./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/condn.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/condn.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY --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 d395fadb914a95d9511046d910130b84077290c26c4e0d02bd3863b898526b50 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:39:04,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:39:04,260 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:39:04,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:39:04,333 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:39:04,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:39:04,343 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:39:04,348 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:39:04,352 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:39:04,361 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:39:04,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:39:04,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:39:04,366 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:39:04,369 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:39:04,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:39:04,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:39:04,383 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:39:04,384 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:39:04,386 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:39:04,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:39:04,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:39:04,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:39:04,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:39:04,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:39:04,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:39:04,402 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:39:04,402 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:39:04,403 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:39:04,404 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:39:04,405 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:39:04,406 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:39:04,407 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:39:04,408 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:39:04,409 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:39:04,411 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:39:04,411 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:39:04,412 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:39:04,413 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:39:04,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:39:04,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:39:04,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:39:04,417 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:39:04,449 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:39:04,449 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:39:04,450 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:39:04,450 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:39:04,451 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:39:04,452 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:39:04,452 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:39:04,452 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:39:04,453 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:39:04,453 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:39:04,453 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:39:04,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:39:04,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:39:04,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:39:04,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:39:04,455 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:39:04,455 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:39:04,455 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:39:04,455 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:39:04,456 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:39:04,456 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:39:04,456 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:39:04,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:39:04,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:39:04,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:39:04,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:39:04,458 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:39:04,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:39:04,458 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:39:04,459 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:39:04,459 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:39:04,459 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:39:04,460 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_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d395fadb914a95d9511046d910130b84077290c26c4e0d02bd3863b898526b50 [2021-11-07 07:39:04,775 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:39:04,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:39:04,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:39:04,824 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:39:04,825 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:39:04,825 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/array-fpi/condn.c [2021-11-07 07:39:04,918 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/data/5aec078d5/ff9e1ec3f1b94ab7bc162b640e1d8998/FLAGd504041e6 [2021-11-07 07:39:05,475 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:39:05,476 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/sv-benchmarks/c/array-fpi/condn.c [2021-11-07 07:39:05,490 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/data/5aec078d5/ff9e1ec3f1b94ab7bc162b640e1d8998/FLAGd504041e6 [2021-11-07 07:39:05,811 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/data/5aec078d5/ff9e1ec3f1b94ab7bc162b640e1d8998 [2021-11-07 07:39:05,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:39:05,816 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:39:05,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:39:05,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:39:05,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:39:05,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:39:05" (1/1) ... [2021-11-07 07:39:05,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c4e6e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:05, skipping insertion in model container [2021-11-07 07:39:05,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:39:05" (1/1) ... [2021-11-07 07:39:05,844 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:39:05,865 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:39:06,107 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_edbcf856-f952-44df-96c0-0e1d52bbf358/sv-benchmarks/c/array-fpi/condn.c[588,601] [2021-11-07 07:39:06,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:39:06,155 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:39:06,181 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_edbcf856-f952-44df-96c0-0e1d52bbf358/sv-benchmarks/c/array-fpi/condn.c[588,601] [2021-11-07 07:39:06,210 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:39:06,231 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:39:06,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:06 WrapperNode [2021-11-07 07:39:06,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:39:06,234 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:39:06,234 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:39:06,235 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:39:06,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:06" (1/1) ... [2021-11-07 07:39:06,265 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:06" (1/1) ... [2021-11-07 07:39:06,298 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:39:06,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:39:06,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:39:06,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:39:06,310 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:06" (1/1) ... [2021-11-07 07:39:06,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:06" (1/1) ... [2021-11-07 07:39:06,315 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:06" (1/1) ... [2021-11-07 07:39:06,316 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:06" (1/1) ... [2021-11-07 07:39:06,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:06" (1/1) ... [2021-11-07 07:39:06,340 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:06" (1/1) ... [2021-11-07 07:39:06,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:06" (1/1) ... [2021-11-07 07:39:06,356 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:39:06,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:39:06,359 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:39:06,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:39:06,362 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:06" (1/1) ... [2021-11-07 07:39:06,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:39:06,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:06,404 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:39:06,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:39:06,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:39:06,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:39:06,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 07:39:06,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 07:39:06,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:39:06,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:39:06,469 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 07:39:06,730 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:39:06,730 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-07 07:39:06,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:39:06 BoogieIcfgContainer [2021-11-07 07:39:06,733 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:39:06,735 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:39:06,735 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:39:06,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:39:06,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:39:05" (1/3) ... [2021-11-07 07:39:06,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b759260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:39:06, skipping insertion in model container [2021-11-07 07:39:06,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:06" (2/3) ... [2021-11-07 07:39:06,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b759260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:39:06, skipping insertion in model container [2021-11-07 07:39:06,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:39:06" (3/3) ... [2021-11-07 07:39:06,743 INFO L111 eAbstractionObserver]: Analyzing ICFG condn.c [2021-11-07 07:39:06,749 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:39:06,750 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 07:39:06,809 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:39:06,818 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 [2021-11-07 07:39:06,819 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 07:39:06,837 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:06,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 07:39:06,844 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:06,845 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:06,846 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:06,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:06,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1828392228, now seen corresponding path program 1 times [2021-11-07 07:39:06,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:06,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397268118] [2021-11-07 07:39:06,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:06,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:07,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:07,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:07,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:07,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397268118] [2021-11-07 07:39:07,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397268118] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:39:07,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:39:07,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:39:07,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494404872] [2021-11-07 07:39:07,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 07:39:07,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:07,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 07:39:07,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 07:39:07,196 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:07,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:07,219 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2021-11-07 07:39:07,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 07:39:07,220 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-07 07:39:07,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:07,233 INFO L225 Difference]: With dead ends: 40 [2021-11-07 07:39:07,233 INFO L226 Difference]: Without dead ends: 18 [2021-11-07 07:39:07,238 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 07:39:07,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-07 07:39:07,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-07 07:39:07,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:07,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-11-07 07:39:07,280 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2021-11-07 07:39:07,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:07,281 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-11-07 07:39:07,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:07,282 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-11-07 07:39:07,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 07:39:07,283 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:07,283 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:07,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:39:07,284 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:07,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:07,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1148333858, now seen corresponding path program 1 times [2021-11-07 07:39:07,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:07,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255927151] [2021-11-07 07:39:07,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:07,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:07,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:07,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:07,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255927151] [2021-11-07 07:39:07,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255927151] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:39:07,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:39:07,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:39:07,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298183579] [2021-11-07 07:39:07,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:39:07,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:07,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:39:07,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:39:07,445 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:07,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:07,545 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2021-11-07 07:39:07,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:39:07,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-07 07:39:07,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:07,555 INFO L225 Difference]: With dead ends: 40 [2021-11-07 07:39:07,556 INFO L226 Difference]: Without dead ends: 29 [2021-11-07 07:39:07,557 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:39:07,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-07 07:39:07,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2021-11-07 07:39:07,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 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) [2021-11-07 07:39:07,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-11-07 07:39:07,567 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-11-07 07:39:07,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:07,568 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-11-07 07:39:07,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:07,570 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-11-07 07:39:07,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 07:39:07,597 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:07,598 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:07,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 07:39:07,599 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:07,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:07,602 INFO L85 PathProgramCache]: Analyzing trace with hash -2142875084, now seen corresponding path program 1 times [2021-11-07 07:39:07,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:07,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187553961] [2021-11-07 07:39:07,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:07,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:08,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:39:08,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:08,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187553961] [2021-11-07 07:39:08,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187553961] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:08,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356845962] [2021-11-07 07:39:08,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:08,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:08,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:08,039 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:08,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:39:08,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:08,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 07:39:08,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:08,245 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 [2021-11-07 07:39:08,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:39:08,559 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 35 treesize of output 27 [2021-11-07 07:39:08,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:08,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356845962] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:08,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:39:08,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-11-07 07:39:08,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228291916] [2021-11-07 07:39:08,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 07:39:08,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:08,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 07:39:08,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:39:08,630 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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) [2021-11-07 07:39:08,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:08,864 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2021-11-07 07:39:08,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 07:39:08,865 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 07:39:08,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:08,866 INFO L225 Difference]: With dead ends: 47 [2021-11-07 07:39:08,867 INFO L226 Difference]: Without dead ends: 45 [2021-11-07 07:39:08,868 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:39:08,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-07 07:39:08,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2021-11-07 07:39:08,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:08,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-11-07 07:39:08,880 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2021-11-07 07:39:08,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:08,880 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-11-07 07:39:08,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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) [2021-11-07 07:39:08,881 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-11-07 07:39:08,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 07:39:08,882 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:08,883 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:08,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-07 07:39:09,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:09,103 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:09,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:09,103 INFO L85 PathProgramCache]: Analyzing trace with hash -367867722, now seen corresponding path program 1 times [2021-11-07 07:39:09,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:09,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645437029] [2021-11-07 07:39:09,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:09,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:09,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:39:09,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:09,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645437029] [2021-11-07 07:39:09,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645437029] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:09,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094448885] [2021-11-07 07:39:09,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:09,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:09,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:09,380 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:09,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 07:39:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:09,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 07:39:09,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:09,526 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 [2021-11-07 07:39:09,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:39:09,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094448885] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:09,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:39:09,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-07 07:39:09,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477624529] [2021-11-07 07:39:09,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 07:39:09,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:09,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 07:39:09,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:39:09,610 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:09,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:09,755 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-11-07 07:39:09,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 07:39:09,756 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 07:39:09,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:09,761 INFO L225 Difference]: With dead ends: 53 [2021-11-07 07:39:09,762 INFO L226 Difference]: Without dead ends: 51 [2021-11-07 07:39:09,763 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:39:09,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-07 07:39:09,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2021-11-07 07:39:09,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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) [2021-11-07 07:39:09,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-11-07 07:39:09,784 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2021-11-07 07:39:09,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:09,784 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-11-07 07:39:09,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:09,785 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-11-07 07:39:09,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 07:39:09,786 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:09,786 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:09,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:10,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:10,011 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:10,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:10,011 INFO L85 PathProgramCache]: Analyzing trace with hash -203188002, now seen corresponding path program 1 times [2021-11-07 07:39:10,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:10,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953073313] [2021-11-07 07:39:10,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:10,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:10,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:10,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:10,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953073313] [2021-11-07 07:39:10,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953073313] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:10,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947352673] [2021-11-07 07:39:10,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:10,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:10,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:10,148 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:10,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 07:39:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:10,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 07:39:10,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:10,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947352673] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:10,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:39:10,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-11-07 07:39:10,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634705351] [2021-11-07 07:39:10,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 07:39:10,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:10,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 07:39:10,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:39:10,406 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:10,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:10,549 INFO L93 Difference]: Finished difference Result 87 states and 109 transitions. [2021-11-07 07:39:10,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 07:39:10,549 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-07 07:39:10,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:10,559 INFO L225 Difference]: With dead ends: 87 [2021-11-07 07:39:10,559 INFO L226 Difference]: Without dead ends: 54 [2021-11-07 07:39:10,560 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:39:10,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-07 07:39:10,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 36. [2021-11-07 07:39:10,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 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) [2021-11-07 07:39:10,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2021-11-07 07:39:10,567 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 20 [2021-11-07 07:39:10,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:10,567 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2021-11-07 07:39:10,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:10,568 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2021-11-07 07:39:10,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 07:39:10,569 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:10,569 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:10,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:10,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:10,770 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:10,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:10,771 INFO L85 PathProgramCache]: Analyzing trace with hash -15377572, now seen corresponding path program 2 times [2021-11-07 07:39:10,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:10,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708842666] [2021-11-07 07:39:10,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:10,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:10,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 07:39:11,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:11,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708842666] [2021-11-07 07:39:11,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708842666] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:11,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505014494] [2021-11-07 07:39:11,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:39:11,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:11,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:11,046 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:11,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 07:39:11,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:39:11,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:39:11,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 07:39:11,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:11,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-07 07:39:11,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:39:11,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 07:39:11,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 07:39:11,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 27 [2021-11-07 07:39:11,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:39:11,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505014494] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:11,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:39:11,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-11-07 07:39:11,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106126908] [2021-11-07 07:39:11,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 07:39:11,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:11,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 07:39:11,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-11-07 07:39:11,550 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 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) [2021-11-07 07:39:12,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:12,087 INFO L93 Difference]: Finished difference Result 109 states and 128 transitions. [2021-11-07 07:39:12,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 07:39:12,088 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-07 07:39:12,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:12,091 INFO L225 Difference]: With dead ends: 109 [2021-11-07 07:39:12,091 INFO L226 Difference]: Without dead ends: 107 [2021-11-07 07:39:12,092 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2021-11-07 07:39:12,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-07 07:39:12,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 51. [2021-11-07 07:39:12,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.32) internal successors, (66), 50 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) [2021-11-07 07:39:12,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2021-11-07 07:39:12,103 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 22 [2021-11-07 07:39:12,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:12,103 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2021-11-07 07:39:12,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 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) [2021-11-07 07:39:12,104 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2021-11-07 07:39:12,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 07:39:12,105 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:12,105 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:12,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:12,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:12,330 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:12,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:12,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1394926352, now seen corresponding path program 1 times [2021-11-07 07:39:12,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:12,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127179181] [2021-11-07 07:39:12,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:12,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:12,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:12,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:12,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127179181] [2021-11-07 07:39:12,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127179181] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:12,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312699089] [2021-11-07 07:39:12,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:12,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:12,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:12,698 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:12,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 07:39:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:12,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 07:39:12,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:12,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:39:12,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-07 07:39:13,093 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 39 treesize of output 27 [2021-11-07 07:39:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:39:13,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312699089] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:13,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:39:13,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 18 [2021-11-07 07:39:13,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314909133] [2021-11-07 07:39:13,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 07:39:13,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:13,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 07:39:13,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:39:13,128 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:13,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:13,652 INFO L93 Difference]: Finished difference Result 93 states and 113 transitions. [2021-11-07 07:39:13,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 07:39:13,653 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-07 07:39:13,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:13,654 INFO L225 Difference]: With dead ends: 93 [2021-11-07 07:39:13,654 INFO L226 Difference]: Without dead ends: 91 [2021-11-07 07:39:13,655 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 07:39:13,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-07 07:39:13,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 54. [2021-11-07 07:39:13,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 53 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) [2021-11-07 07:39:13,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 71 transitions. [2021-11-07 07:39:13,666 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 71 transitions. Word has length 26 [2021-11-07 07:39:13,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:13,667 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 71 transitions. [2021-11-07 07:39:13,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:13,667 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 71 transitions. [2021-11-07 07:39:13,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 07:39:13,668 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:13,669 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:13,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:13,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:13,869 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:13,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:13,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1084873680, now seen corresponding path program 1 times [2021-11-07 07:39:13,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:13,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733825439] [2021-11-07 07:39:13,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:13,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:14,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:14,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:14,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733825439] [2021-11-07 07:39:14,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733825439] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:14,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616005021] [2021-11-07 07:39:14,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:14,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:14,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:14,122 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:14,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 07:39:14,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:14,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 07:39:14,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:14,345 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 [2021-11-07 07:39:14,485 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 07:39:14,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616005021] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:14,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:39:14,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 16 [2021-11-07 07:39:14,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398795181] [2021-11-07 07:39:14,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 07:39:14,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:14,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 07:39:14,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:39:14,490 INFO L87 Difference]: Start difference. First operand 54 states and 71 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:14,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:14,999 INFO L93 Difference]: Finished difference Result 117 states and 141 transitions. [2021-11-07 07:39:15,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 07:39:15,000 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-07 07:39:15,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:15,001 INFO L225 Difference]: With dead ends: 117 [2021-11-07 07:39:15,001 INFO L226 Difference]: Without dead ends: 115 [2021-11-07 07:39:15,003 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=246, Invalid=810, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 07:39:15,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-07 07:39:15,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 67. [2021-11-07 07:39:15,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.393939393939394) internal successors, (92), 66 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:15,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 92 transitions. [2021-11-07 07:39:15,015 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 92 transitions. Word has length 26 [2021-11-07 07:39:15,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:15,015 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 92 transitions. [2021-11-07 07:39:15,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:15,016 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 92 transitions. [2021-11-07 07:39:15,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 07:39:15,017 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:15,017 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:15,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:15,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-07 07:39:15,243 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:15,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:15,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1656064548, now seen corresponding path program 3 times [2021-11-07 07:39:15,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:15,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872864840] [2021-11-07 07:39:15,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:15,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:15,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:15,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872864840] [2021-11-07 07:39:15,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872864840] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:15,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345158884] [2021-11-07 07:39:15,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:39:15,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:15,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:15,365 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:15,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 07:39:15,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 07:39:15,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:39:15,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 07:39:15,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:15,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-07 07:39:15,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:39:15,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-07 07:39:16,326 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-11-07 07:39:16,327 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 93 treesize of output 42 [2021-11-07 07:39:16,387 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 07:39:16,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345158884] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:16,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:39:16,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 24 [2021-11-07 07:39:16,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375679987] [2021-11-07 07:39:16,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 07:39:16,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:16,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 07:39:16,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-11-07 07:39:16,393 INFO L87 Difference]: Start difference. First operand 67 states and 92 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:17,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:17,398 INFO L93 Difference]: Finished difference Result 194 states and 250 transitions. [2021-11-07 07:39:17,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 07:39:17,399 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-07 07:39:17,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:17,402 INFO L225 Difference]: With dead ends: 194 [2021-11-07 07:39:17,402 INFO L226 Difference]: Without dead ends: 102 [2021-11-07 07:39:17,405 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=337, Invalid=1385, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 07:39:17,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-07 07:39:17,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 73. [2021-11-07 07:39:17,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.3333333333333333) internal successors, (96), 72 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:17,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 96 transitions. [2021-11-07 07:39:17,427 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 96 transitions. Word has length 28 [2021-11-07 07:39:17,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:17,427 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 96 transitions. [2021-11-07 07:39:17,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:17,428 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 96 transitions. [2021-11-07 07:39:17,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 07:39:17,437 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:17,437 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:17,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:17,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:17,652 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:17,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:17,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1119298982, now seen corresponding path program 4 times [2021-11-07 07:39:17,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:17,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699519273] [2021-11-07 07:39:17,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:17,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:17,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:17,755 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:17,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:17,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699519273] [2021-11-07 07:39:17,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699519273] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:17,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941001892] [2021-11-07 07:39:17,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:39:17,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:17,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:17,762 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:17,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 07:39:17,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:39:17,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:39:17,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 07:39:17,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:18,120 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:18,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941001892] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:18,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:39:18,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-11-07 07:39:18,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532798329] [2021-11-07 07:39:18,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 07:39:18,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:18,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 07:39:18,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:39:18,123 INFO L87 Difference]: Start difference. First operand 73 states and 96 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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) [2021-11-07 07:39:18,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:18,351 INFO L93 Difference]: Finished difference Result 232 states and 300 transitions. [2021-11-07 07:39:18,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 07:39:18,352 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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) Word has length 30 [2021-11-07 07:39:18,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:18,354 INFO L225 Difference]: With dead ends: 232 [2021-11-07 07:39:18,354 INFO L226 Difference]: Without dead ends: 187 [2021-11-07 07:39:18,356 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-11-07 07:39:18,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-07 07:39:18,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 123. [2021-11-07 07:39:18,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.3114754098360655) internal successors, (160), 122 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) [2021-11-07 07:39:18,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 160 transitions. [2021-11-07 07:39:18,385 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 160 transitions. Word has length 30 [2021-11-07 07:39:18,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:18,385 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 160 transitions. [2021-11-07 07:39:18,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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) [2021-11-07 07:39:18,386 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 160 transitions. [2021-11-07 07:39:18,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 07:39:18,388 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:18,388 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:18,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:18,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 07:39:18,599 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:18,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:18,599 INFO L85 PathProgramCache]: Analyzing trace with hash 161769200, now seen corresponding path program 1 times [2021-11-07 07:39:18,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:18,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133583750] [2021-11-07 07:39:18,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:18,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:19,261 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:19,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:19,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133583750] [2021-11-07 07:39:19,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133583750] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:19,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644042986] [2021-11-07 07:39:19,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:19,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:19,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:19,267 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:19,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 07:39:19,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:19,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 07:39:19,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:19,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:39:19,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-07 07:39:19,699 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-07 07:39:19,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-07 07:39:19,788 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-07 07:39:19,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:39:19,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-07 07:39:19,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975812147] [2021-11-07 07:39:19,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 07:39:19,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:19,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 07:39:19,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-11-07 07:39:19,791 INFO L87 Difference]: Start difference. First operand 123 states and 160 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:20,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:20,942 INFO L93 Difference]: Finished difference Result 155 states and 190 transitions. [2021-11-07 07:39:20,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 07:39:20,943 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-07 07:39:20,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:20,945 INFO L225 Difference]: With dead ends: 155 [2021-11-07 07:39:20,945 INFO L226 Difference]: Without dead ends: 153 [2021-11-07 07:39:20,946 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=308, Invalid=1498, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 07:39:20,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-07 07:39:20,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 111. [2021-11-07 07:39:20,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.3272727272727274) internal successors, (146), 110 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:20,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 146 transitions. [2021-11-07 07:39:20,972 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 146 transitions. Word has length 31 [2021-11-07 07:39:20,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:20,973 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 146 transitions. [2021-11-07 07:39:20,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:20,973 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 146 transitions. [2021-11-07 07:39:20,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 07:39:20,977 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:20,977 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:21,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:21,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-07 07:39:21,195 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:21,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:21,195 INFO L85 PathProgramCache]: Analyzing trace with hash -683665576, now seen corresponding path program 5 times [2021-11-07 07:39:21,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:21,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249385542] [2021-11-07 07:39:21,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:21,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:21,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:21,749 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:21,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:21,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249385542] [2021-11-07 07:39:21,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249385542] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:21,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080377280] [2021-11-07 07:39:21,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:39:21,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:21,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:21,755 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:21,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 07:39:22,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-07 07:39:22,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:39:22,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 07:39:22,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:22,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-07 07:39:22,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:39:22,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 07:39:22,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-11-07 07:39:22,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:39:22,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 07:39:22,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-11-07 07:39:22,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:39:22,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 07:39:22,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 07:39:22,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 27 [2021-11-07 07:39:22,663 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:39:22,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080377280] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:22,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:39:22,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-11-07 07:39:22,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25935851] [2021-11-07 07:39:22,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-07 07:39:22,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:22,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-07 07:39:22,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2021-11-07 07:39:22,666 INFO L87 Difference]: Start difference. First operand 111 states and 146 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 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) [2021-11-07 07:39:24,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:24,243 INFO L93 Difference]: Finished difference Result 261 states and 306 transitions. [2021-11-07 07:39:24,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-07 07:39:24,244 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 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 32 [2021-11-07 07:39:24,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:24,246 INFO L225 Difference]: With dead ends: 261 [2021-11-07 07:39:24,246 INFO L226 Difference]: Without dead ends: 248 [2021-11-07 07:39:24,249 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1280 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=740, Invalid=3420, Unknown=0, NotChecked=0, Total=4160 [2021-11-07 07:39:24,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-11-07 07:39:24,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 119. [2021-11-07 07:39:24,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.2627118644067796) internal successors, (149), 118 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:24,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 149 transitions. [2021-11-07 07:39:24,299 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 149 transitions. Word has length 32 [2021-11-07 07:39:24,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:24,299 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 149 transitions. [2021-11-07 07:39:24,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 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) [2021-11-07 07:39:24,300 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 149 transitions. [2021-11-07 07:39:24,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 07:39:24,301 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:24,301 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:24,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:24,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:24,526 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:24,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:24,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1754360412, now seen corresponding path program 2 times [2021-11-07 07:39:24,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:24,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394245295] [2021-11-07 07:39:24,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:24,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:24,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:24,981 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:24,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:24,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394245295] [2021-11-07 07:39:24,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394245295] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:24,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338920559] [2021-11-07 07:39:24,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:39:24,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:24,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:24,983 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:25,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 07:39:25,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:39:25,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:39:25,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 07:39:25,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:25,372 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 [2021-11-07 07:39:25,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:39:25,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:39:25,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-07 07:39:25,726 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 35 treesize of output 27 [2021-11-07 07:39:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:25,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338920559] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:25,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:39:25,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 22 [2021-11-07 07:39:25,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709648672] [2021-11-07 07:39:25,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 07:39:25,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:25,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 07:39:25,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:39:25,759 INFO L87 Difference]: Start difference. First operand 119 states and 149 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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) [2021-11-07 07:39:26,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:26,428 INFO L93 Difference]: Finished difference Result 182 states and 216 transitions. [2021-11-07 07:39:26,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 07:39:26,429 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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) Word has length 35 [2021-11-07 07:39:26,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:26,431 INFO L225 Difference]: With dead ends: 182 [2021-11-07 07:39:26,431 INFO L226 Difference]: Without dead ends: 167 [2021-11-07 07:39:26,432 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=391, Invalid=1501, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 07:39:26,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-07 07:39:26,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 132. [2021-11-07 07:39:26,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.2442748091603053) internal successors, (163), 131 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) [2021-11-07 07:39:26,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 163 transitions. [2021-11-07 07:39:26,453 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 163 transitions. Word has length 35 [2021-11-07 07:39:26,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:26,453 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 163 transitions. [2021-11-07 07:39:26,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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) [2021-11-07 07:39:26,454 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 163 transitions. [2021-11-07 07:39:26,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 07:39:26,455 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:26,456 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:26,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:26,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-07 07:39:26,675 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:26,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:26,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1260743206, now seen corresponding path program 2 times [2021-11-07 07:39:26,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:26,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973113609] [2021-11-07 07:39:26,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:26,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:27,074 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:27,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:27,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973113609] [2021-11-07 07:39:27,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973113609] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:27,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682937256] [2021-11-07 07:39:27,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:39:27,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:27,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:27,079 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:27,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 07:39:27,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:39:27,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:39:27,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 07:39:27,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:27,528 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 [2021-11-07 07:39:27,748 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 07:39:27,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682937256] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:27,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:39:27,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 20 [2021-11-07 07:39:27,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363583375] [2021-11-07 07:39:27,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 07:39:27,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:27,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 07:39:27,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-11-07 07:39:27,751 INFO L87 Difference]: Start difference. First operand 132 states and 163 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 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) [2021-11-07 07:39:28,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:28,353 INFO L93 Difference]: Finished difference Result 223 states and 264 transitions. [2021-11-07 07:39:28,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 07:39:28,353 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-07 07:39:28,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:28,355 INFO L225 Difference]: With dead ends: 223 [2021-11-07 07:39:28,355 INFO L226 Difference]: Without dead ends: 199 [2021-11-07 07:39:28,356 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=357, Invalid=1283, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 07:39:28,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-07 07:39:28,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 135. [2021-11-07 07:39:28,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.2686567164179106) internal successors, (170), 134 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:28,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 170 transitions. [2021-11-07 07:39:28,377 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 170 transitions. Word has length 35 [2021-11-07 07:39:28,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:28,378 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 170 transitions. [2021-11-07 07:39:28,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 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) [2021-11-07 07:39:28,378 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 170 transitions. [2021-11-07 07:39:28,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 07:39:28,379 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:28,379 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:28,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:28,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:28,594 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:28,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:28,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1994217842, now seen corresponding path program 3 times [2021-11-07 07:39:28,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:28,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349562482] [2021-11-07 07:39:28,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:28,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:28,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:29,355 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:29,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:29,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349562482] [2021-11-07 07:39:29,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349562482] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:29,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054488020] [2021-11-07 07:39:29,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:39:29,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:29,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:29,359 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:29,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 07:39:29,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-07 07:39:29,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:39:29,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 07:39:29,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:29,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-07 07:39:29,923 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-07 07:39:29,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 24 [2021-11-07 07:39:29,991 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-07 07:39:29,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-07 07:39:30,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-07 07:39:30,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:39:30,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-07 07:39:30,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945706554] [2021-11-07 07:39:30,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 07:39:30,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:30,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 07:39:30,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-11-07 07:39:30,105 INFO L87 Difference]: Start difference. First operand 135 states and 170 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:31,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:31,210 INFO L93 Difference]: Finished difference Result 310 states and 377 transitions. [2021-11-07 07:39:31,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-07 07:39:31,210 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-07 07:39:31,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:31,215 INFO L225 Difference]: With dead ends: 310 [2021-11-07 07:39:31,215 INFO L226 Difference]: Without dead ends: 308 [2021-11-07 07:39:31,219 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=483, Invalid=2273, Unknown=0, NotChecked=0, Total=2756 [2021-11-07 07:39:31,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-07 07:39:31,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 157. [2021-11-07 07:39:31,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.3205128205128205) internal successors, (206), 156 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:31,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 206 transitions. [2021-11-07 07:39:31,245 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 206 transitions. Word has length 36 [2021-11-07 07:39:31,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:31,245 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 206 transitions. [2021-11-07 07:39:31,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:31,246 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 206 transitions. [2021-11-07 07:39:31,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 07:39:31,247 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:31,247 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:31,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:31,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 07:39:31,450 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:31,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:31,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1545513668, now seen corresponding path program 4 times [2021-11-07 07:39:31,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:31,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518652538] [2021-11-07 07:39:31,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:31,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:31,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:32,123 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:32,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:32,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518652538] [2021-11-07 07:39:32,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518652538] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:32,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034250641] [2021-11-07 07:39:32,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:39:32,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:32,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:32,127 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:32,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 07:39:32,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:39:32,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:39:32,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 07:39:32,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:32,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:39:32,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-07 07:39:32,721 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-07 07:39:32,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-07 07:39:32,808 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-07 07:39:32,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:39:32,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-07 07:39:32,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609384008] [2021-11-07 07:39:32,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 07:39:32,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:32,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 07:39:32,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-11-07 07:39:32,811 INFO L87 Difference]: Start difference. First operand 157 states and 206 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:33,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:33,895 INFO L93 Difference]: Finished difference Result 277 states and 336 transitions. [2021-11-07 07:39:33,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 07:39:33,896 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-07 07:39:33,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:33,898 INFO L225 Difference]: With dead ends: 277 [2021-11-07 07:39:33,898 INFO L226 Difference]: Without dead ends: 275 [2021-11-07 07:39:33,900 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=450, Invalid=2202, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 07:39:33,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-11-07 07:39:33,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 162. [2021-11-07 07:39:33,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.329192546583851) internal successors, (214), 161 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:33,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 214 transitions. [2021-11-07 07:39:33,938 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 214 transitions. Word has length 40 [2021-11-07 07:39:33,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:33,938 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 214 transitions. [2021-11-07 07:39:33,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:33,939 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 214 transitions. [2021-11-07 07:39:33,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 07:39:33,940 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:33,940 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:33,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:34,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 07:39:34,167 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:34,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:34,167 INFO L85 PathProgramCache]: Analyzing trace with hash -748600886, now seen corresponding path program 5 times [2021-11-07 07:39:34,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:34,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612577222] [2021-11-07 07:39:34,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:34,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:34,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:34,321 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 38 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 07:39:34,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:34,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612577222] [2021-11-07 07:39:34,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612577222] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:34,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919791260] [2021-11-07 07:39:34,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:39:34,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:34,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:34,324 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:34,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 07:39:34,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-07 07:39:34,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:39:34,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 07:39:34,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 48 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 07:39:34,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919791260] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:34,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:39:34,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 20 [2021-11-07 07:39:34,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953021723] [2021-11-07 07:39:34,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 07:39:34,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:34,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 07:39:34,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-11-07 07:39:34,970 INFO L87 Difference]: Start difference. First operand 162 states and 214 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:35,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:35,272 INFO L93 Difference]: Finished difference Result 456 states and 587 transitions. [2021-11-07 07:39:35,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 07:39:35,273 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-07 07:39:35,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:35,276 INFO L225 Difference]: With dead ends: 456 [2021-11-07 07:39:35,276 INFO L226 Difference]: Without dead ends: 325 [2021-11-07 07:39:35,277 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2021-11-07 07:39:35,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-11-07 07:39:35,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 219. [2021-11-07 07:39:35,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.298165137614679) internal successors, (283), 218 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:35,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 283 transitions. [2021-11-07 07:39:35,314 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 283 transitions. Word has length 42 [2021-11-07 07:39:35,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:35,314 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 283 transitions. [2021-11-07 07:39:35,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:35,315 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 283 transitions. [2021-11-07 07:39:35,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 07:39:35,316 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:35,316 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:35,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:35,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 07:39:35,542 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:35,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:35,543 INFO L85 PathProgramCache]: Analyzing trace with hash -249765768, now seen corresponding path program 3 times [2021-11-07 07:39:35,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:35,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999386366] [2021-11-07 07:39:35,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:35,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:36,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:36,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999386366] [2021-11-07 07:39:36,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999386366] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:36,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256606483] [2021-11-07 07:39:36,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:39:36,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:36,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:36,090 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:36,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 07:39:36,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-07 07:39:36,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:39:36,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 07:39:36,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:36,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-07 07:39:36,925 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 47 treesize of output 35 [2021-11-07 07:39:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 07:39:36,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256606483] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:36,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:39:36,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 26 [2021-11-07 07:39:36,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151381388] [2021-11-07 07:39:36,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 07:39:36,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:36,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 07:39:36,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2021-11-07 07:39:36,972 INFO L87 Difference]: Start difference. First operand 219 states and 283 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:37,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:37,816 INFO L93 Difference]: Finished difference Result 326 states and 403 transitions. [2021-11-07 07:39:37,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 07:39:37,816 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 07:39:37,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:37,823 INFO L225 Difference]: With dead ends: 326 [2021-11-07 07:39:37,823 INFO L226 Difference]: Without dead ends: 298 [2021-11-07 07:39:37,825 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=513, Invalid=2243, Unknown=0, NotChecked=0, Total=2756 [2021-11-07 07:39:37,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-11-07 07:39:37,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 230. [2021-11-07 07:39:37,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.3013100436681222) internal successors, (298), 229 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:37,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 298 transitions. [2021-11-07 07:39:37,865 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 298 transitions. Word has length 44 [2021-11-07 07:39:37,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:37,865 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 298 transitions. [2021-11-07 07:39:37,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:37,866 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 298 transitions. [2021-11-07 07:39:37,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 07:39:37,867 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:37,867 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:37,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:38,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 07:39:38,078 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:38,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:38,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1846784696, now seen corresponding path program 6 times [2021-11-07 07:39:38,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:38,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752679953] [2021-11-07 07:39:38,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:38,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:38,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:38,501 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:38,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:38,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752679953] [2021-11-07 07:39:38,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752679953] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:38,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376570144] [2021-11-07 07:39:38,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:39:38,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:38,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:38,503 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:38,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 07:39:38,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-07 07:39:38,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:39:38,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 07:39:38,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:39,048 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 [2021-11-07 07:39:39,652 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-07 07:39:39,653 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 76 treesize of output 39 [2021-11-07 07:39:39,701 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 07:39:39,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376570144] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:39,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:39:39,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 31 [2021-11-07 07:39:39,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397645514] [2021-11-07 07:39:39,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-07 07:39:39,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:39,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-07 07:39:39,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2021-11-07 07:39:39,704 INFO L87 Difference]: Start difference. First operand 230 states and 298 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:41,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:41,503 INFO L93 Difference]: Finished difference Result 396 states and 486 transitions. [2021-11-07 07:39:41,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-07 07:39:41,504 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 07:39:41,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:41,506 INFO L225 Difference]: With dead ends: 396 [2021-11-07 07:39:41,506 INFO L226 Difference]: Without dead ends: 358 [2021-11-07 07:39:41,508 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1699 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=938, Invalid=4914, Unknown=0, NotChecked=0, Total=5852 [2021-11-07 07:39:41,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-11-07 07:39:41,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 163. [2021-11-07 07:39:41,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.3024691358024691) internal successors, (211), 162 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:41,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 211 transitions. [2021-11-07 07:39:41,547 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 211 transitions. Word has length 44 [2021-11-07 07:39:41,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:41,547 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 211 transitions. [2021-11-07 07:39:41,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:41,548 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 211 transitions. [2021-11-07 07:39:41,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 07:39:41,549 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:41,549 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:41,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:41,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:41,762 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:41,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:41,763 INFO L85 PathProgramCache]: Analyzing trace with hash 241103304, now seen corresponding path program 7 times [2021-11-07 07:39:41,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:41,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526838474] [2021-11-07 07:39:41,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:41,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:41,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:41,923 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 38 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 07:39:41,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:41,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526838474] [2021-11-07 07:39:41,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526838474] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:41,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251991304] [2021-11-07 07:39:41,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:39:41,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:41,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:41,930 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:41,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 07:39:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:42,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 07:39:42,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:42,741 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 07:39:42,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251991304] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:42,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:39:42,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-07 07:39:42,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421262107] [2021-11-07 07:39:42,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 07:39:42,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:42,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 07:39:42,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:39:42,745 INFO L87 Difference]: Start difference. First operand 163 states and 211 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 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) [2021-11-07 07:39:43,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:43,061 INFO L93 Difference]: Finished difference Result 524 states and 682 transitions. [2021-11-07 07:39:43,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 07:39:43,061 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 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) Word has length 44 [2021-11-07 07:39:43,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:43,064 INFO L225 Difference]: With dead ends: 524 [2021-11-07 07:39:43,064 INFO L226 Difference]: Without dead ends: 414 [2021-11-07 07:39:43,065 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-11-07 07:39:43,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-11-07 07:39:43,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 259. [2021-11-07 07:39:43,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.310077519379845) internal successors, (338), 258 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:43,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 338 transitions. [2021-11-07 07:39:43,120 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 338 transitions. Word has length 44 [2021-11-07 07:39:43,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:43,121 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 338 transitions. [2021-11-07 07:39:43,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 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) [2021-11-07 07:39:43,121 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 338 transitions. [2021-11-07 07:39:43,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 07:39:43,127 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:43,127 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:43,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-11-07 07:39:43,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-11-07 07:39:43,346 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:43,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:43,347 INFO L85 PathProgramCache]: Analyzing trace with hash -2135909818, now seen corresponding path program 8 times [2021-11-07 07:39:43,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:43,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848499941] [2021-11-07 07:39:43,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:43,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:43,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:43,923 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 9 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:43,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:43,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848499941] [2021-11-07 07:39:43,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848499941] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:43,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287709779] [2021-11-07 07:39:43,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:39:43,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:43,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:43,925 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:43,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 07:39:44,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:39:44,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:39:44,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 07:39:44,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:44,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:39:44,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-07 07:39:44,636 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-07 07:39:44,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 37 [2021-11-07 07:39:44,756 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-07 07:39:44,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 37 [2021-11-07 07:39:44,873 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-07 07:39:44,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-11-07 07:39:45,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-07 07:39:45,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:39:45,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-07 07:39:45,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642280220] [2021-11-07 07:39:45,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 07:39:45,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:45,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 07:39:45,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-11-07 07:39:45,046 INFO L87 Difference]: Start difference. First operand 259 states and 338 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:47,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:47,837 INFO L93 Difference]: Finished difference Result 520 states and 626 transitions. [2021-11-07 07:39:47,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-07 07:39:47,838 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 07:39:47,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:47,841 INFO L225 Difference]: With dead ends: 520 [2021-11-07 07:39:47,841 INFO L226 Difference]: Without dead ends: 518 [2021-11-07 07:39:47,845 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2348 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1033, Invalid=6277, Unknown=0, NotChecked=0, Total=7310 [2021-11-07 07:39:47,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-11-07 07:39:47,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 267. [2021-11-07 07:39:47,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.3233082706766917) internal successors, (352), 266 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:47,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 352 transitions. [2021-11-07 07:39:47,911 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 352 transitions. Word has length 46 [2021-11-07 07:39:47,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:47,911 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 352 transitions. [2021-11-07 07:39:47,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:47,911 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 352 transitions. [2021-11-07 07:39:47,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 07:39:47,913 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:47,913 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:47,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:48,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:48,126 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:48,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:48,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1154284448, now seen corresponding path program 9 times [2021-11-07 07:39:48,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:48,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037448365] [2021-11-07 07:39:48,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:48,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:48,805 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:48,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:48,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037448365] [2021-11-07 07:39:48,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037448365] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:48,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180102211] [2021-11-07 07:39:48,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:39:48,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:48,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:48,807 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:48,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 07:39:49,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-07 07:39:49,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:39:49,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 07:39:49,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:49,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-07 07:39:49,610 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-07 07:39:49,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 32 [2021-11-07 07:39:49,747 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-07 07:39:49,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:39:49,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-07 07:39:49,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95452681] [2021-11-07 07:39:49,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 07:39:49,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:49,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 07:39:49,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-11-07 07:39:49,749 INFO L87 Difference]: Start difference. First operand 267 states and 352 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:50,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:50,799 INFO L93 Difference]: Finished difference Result 360 states and 444 transitions. [2021-11-07 07:39:50,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 07:39:50,800 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 07:39:50,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:50,803 INFO L225 Difference]: With dead ends: 360 [2021-11-07 07:39:50,803 INFO L226 Difference]: Without dead ends: 358 [2021-11-07 07:39:50,805 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=459, Invalid=2193, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 07:39:50,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-11-07 07:39:50,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 181. [2021-11-07 07:39:50,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.2777777777777777) internal successors, (230), 180 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:50,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 230 transitions. [2021-11-07 07:39:50,880 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 230 transitions. Word has length 49 [2021-11-07 07:39:50,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:50,881 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 230 transitions. [2021-11-07 07:39:50,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:50,881 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 230 transitions. [2021-11-07 07:39:50,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 07:39:50,882 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:50,883 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:50,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:51,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:51,106 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:51,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:51,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1481777778, now seen corresponding path program 10 times [2021-11-07 07:39:51,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:51,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668529461] [2021-11-07 07:39:51,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:51,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:51,276 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 54 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 07:39:51,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:51,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668529461] [2021-11-07 07:39:51,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668529461] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:51,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882430476] [2021-11-07 07:39:51,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:39:51,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:51,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:51,283 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:51,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 07:39:51,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:39:51,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:39:51,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 07:39:51,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:52,323 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 70 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 07:39:52,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882430476] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:52,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:39:52,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-11-07 07:39:52,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530308817] [2021-11-07 07:39:52,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 07:39:52,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:52,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 07:39:52,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-11-07 07:39:52,326 INFO L87 Difference]: Start difference. First operand 181 states and 230 transitions. Second operand has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 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) [2021-11-07 07:39:52,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:52,940 INFO L93 Difference]: Finished difference Result 442 states and 564 transitions. [2021-11-07 07:39:52,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 07:39:52,941 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 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 49 [2021-11-07 07:39:52,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:52,944 INFO L225 Difference]: With dead ends: 442 [2021-11-07 07:39:52,944 INFO L226 Difference]: Without dead ends: 366 [2021-11-07 07:39:52,945 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=355, Invalid=1127, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 07:39:52,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-11-07 07:39:53,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 265. [2021-11-07 07:39:53,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.2916666666666667) internal successors, (341), 264 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:53,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 341 transitions. [2021-11-07 07:39:53,039 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 341 transitions. Word has length 49 [2021-11-07 07:39:53,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:53,039 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 341 transitions. [2021-11-07 07:39:53,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 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) [2021-11-07 07:39:53,039 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 341 transitions. [2021-11-07 07:39:53,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 07:39:53,040 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:53,040 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:53,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:53,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-07 07:39:53,254 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:53,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:53,255 INFO L85 PathProgramCache]: Analyzing trace with hash 798753404, now seen corresponding path program 11 times [2021-11-07 07:39:53,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:53,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34303493] [2021-11-07 07:39:53,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:53,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:54,247 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 2 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:54,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:54,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34303493] [2021-11-07 07:39:54,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34303493] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:54,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151469928] [2021-11-07 07:39:54,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:39:54,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:54,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:54,251 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:54,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 07:39:54,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-07 07:39:54,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:39:54,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-07 07:39:54,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:55,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-07 07:39:55,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:39:55,239 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 07:39:55,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-11-07 07:39:55,340 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-07 07:39:55,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-11-07 07:39:55,507 INFO L354 Elim1Store]: treesize reduction 125, result has 16.1 percent of original size [2021-11-07 07:39:55,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 47 [2021-11-07 07:39:55,612 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-07 07:39:55,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:39:55,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-07 07:39:55,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966279267] [2021-11-07 07:39:55,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 07:39:55,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:55,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 07:39:55,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2021-11-07 07:39:55,615 INFO L87 Difference]: Start difference. First operand 265 states and 341 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:57,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:57,659 INFO L93 Difference]: Finished difference Result 386 states and 461 transitions. [2021-11-07 07:39:57,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-07 07:39:57,659 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-07 07:39:57,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:57,662 INFO L225 Difference]: With dead ends: 386 [2021-11-07 07:39:57,662 INFO L226 Difference]: Without dead ends: 365 [2021-11-07 07:39:57,665 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1792 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=749, Invalid=5103, Unknown=0, NotChecked=0, Total=5852 [2021-11-07 07:39:57,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-11-07 07:39:57,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 199. [2021-11-07 07:39:57,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.2424242424242424) internal successors, (246), 198 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) [2021-11-07 07:39:57,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 246 transitions. [2021-11-07 07:39:57,736 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 246 transitions. Word has length 50 [2021-11-07 07:39:57,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:57,737 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 246 transitions. [2021-11-07 07:39:57,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:57,737 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 246 transitions. [2021-11-07 07:39:57,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 07:39:57,738 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:57,739 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:57,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:57,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:57,954 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:57,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:57,955 INFO L85 PathProgramCache]: Analyzing trace with hash 902568116, now seen corresponding path program 12 times [2021-11-07 07:39:57,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:57,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992369816] [2021-11-07 07:39:57,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:57,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:57,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 16 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:58,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:58,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992369816] [2021-11-07 07:39:58,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992369816] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:58,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892445164] [2021-11-07 07:39:58,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:39:58,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:58,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:58,866 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:58,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 07:39:59,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-07 07:39:59,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:39:59,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-07 07:39:59,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:59,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:39:59,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-07 07:39:59,780 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-07 07:39:59,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 37 [2021-11-07 07:39:59,905 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-07 07:39:59,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 37 [2021-11-07 07:40:00,082 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-07 07:40:00,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 40 [2021-11-07 07:40:00,222 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-11-07 07:40:00,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 45 [2021-11-07 07:40:00,812 INFO L354 Elim1Store]: treesize reduction 120, result has 16.1 percent of original size [2021-11-07 07:40:00,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 70 treesize of output 64 [2021-11-07 07:40:01,692 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-07 07:40:01,693 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 95 treesize of output 44 [2021-11-07 07:40:01,738 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 7 proven. 78 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-07 07:40:01,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892445164] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:40:01,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:40:01,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18] total 38 [2021-11-07 07:40:01,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957905324] [2021-11-07 07:40:01,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-07 07:40:01,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:40:01,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-07 07:40:01,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1204, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 07:40:01,743 INFO L87 Difference]: Start difference. First operand 199 states and 246 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:29,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:40:29,546 INFO L93 Difference]: Finished difference Result 546 states and 612 transitions. [2021-11-07 07:40:29,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-11-07 07:40:29,546 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 07:40:29,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:40:29,550 INFO L225 Difference]: With dead ends: 546 [2021-11-07 07:40:29,550 INFO L226 Difference]: Without dead ends: 544 [2021-11-07 07:40:29,554 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10161 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=4227, Invalid=25527, Unknown=2, NotChecked=0, Total=29756 [2021-11-07 07:40:29,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-07 07:40:29,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 155. [2021-11-07 07:40:29,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.2012987012987013) internal successors, (185), 154 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:29,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 185 transitions. [2021-11-07 07:40:29,627 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 185 transitions. Word has length 51 [2021-11-07 07:40:29,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:40:29,627 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 185 transitions. [2021-11-07 07:40:29,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:29,628 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 185 transitions. [2021-11-07 07:40:29,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 07:40:29,629 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:40:29,629 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:40:29,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-07 07:40:29,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-07 07:40:29,842 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:40:29,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:40:29,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1679516396, now seen corresponding path program 4 times [2021-11-07 07:40:29,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:40:29,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721224334] [2021-11-07 07:40:29,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:40:29,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:40:29,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:40:30,336 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:40:30,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:40:30,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721224334] [2021-11-07 07:40:30,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721224334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:40:30,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446018181] [2021-11-07 07:40:30,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:40:30,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:40:30,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:40:30,338 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:40:30,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-07 07:40:30,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:40:30,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:40:30,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 07:40:30,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:40:31,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:40:31,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:40:31,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:40:31,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-07 07:40:31,464 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 39 treesize of output 27 [2021-11-07 07:40:31,495 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 07:40:31,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446018181] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:40:31,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:40:31,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 15] total 30 [2021-11-07 07:40:31,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437253760] [2021-11-07 07:40:31,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-07 07:40:31,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:40:31,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-07 07:40:31,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-11-07 07:40:31,498 INFO L87 Difference]: Start difference. First operand 155 states and 185 transitions. Second operand has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 30 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:32,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:40:32,801 INFO L93 Difference]: Finished difference Result 258 states and 296 transitions. [2021-11-07 07:40:32,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-07 07:40:32,801 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 30 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 07:40:32,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:40:32,802 INFO L225 Difference]: With dead ends: 258 [2021-11-07 07:40:32,803 INFO L226 Difference]: Without dead ends: 235 [2021-11-07 07:40:32,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=516, Invalid=3024, Unknown=0, NotChecked=0, Total=3540 [2021-11-07 07:40:32,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-07 07:40:32,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 178. [2021-11-07 07:40:32,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.1977401129943503) internal successors, (212), 177 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:32,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 212 transitions. [2021-11-07 07:40:32,889 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 212 transitions. Word has length 53 [2021-11-07 07:40:32,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:40:32,889 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 212 transitions. [2021-11-07 07:40:32,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 30 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:32,890 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 212 transitions. [2021-11-07 07:40:32,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 07:40:32,891 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:40:32,891 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:40:32,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-07 07:40:33,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-07 07:40:33,114 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:40:33,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:40:33,115 INFO L85 PathProgramCache]: Analyzing trace with hash 810012566, now seen corresponding path program 13 times [2021-11-07 07:40:33,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:40:33,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69740923] [2021-11-07 07:40:33,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:40:33,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:40:33,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:40:33,621 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:40:33,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:40:33,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69740923] [2021-11-07 07:40:33,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69740923] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:40:33,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128435426] [2021-11-07 07:40:33,622 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:40:33,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:40:33,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:40:33,627 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:40:33,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-07 07:40:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:40:34,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 07:40:34,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:40:34,437 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 [2021-11-07 07:40:34,726 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 07:40:34,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128435426] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:40:34,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:40:34,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 14] total 28 [2021-11-07 07:40:34,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933575047] [2021-11-07 07:40:34,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-07 07:40:34,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:40:34,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-07 07:40:34,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-11-07 07:40:34,729 INFO L87 Difference]: Start difference. First operand 178 states and 212 transitions. Second operand has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 28 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:36,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:40:36,161 INFO L93 Difference]: Finished difference Result 294 states and 332 transitions. [2021-11-07 07:40:36,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-07 07:40:36,162 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 28 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 07:40:36,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:40:36,163 INFO L225 Difference]: With dead ends: 294 [2021-11-07 07:40:36,163 INFO L226 Difference]: Without dead ends: 252 [2021-11-07 07:40:36,164 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=558, Invalid=3348, Unknown=0, NotChecked=0, Total=3906 [2021-11-07 07:40:36,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-07 07:40:36,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 149. [2021-11-07 07:40:36,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.1824324324324325) internal successors, (175), 148 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:36,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 175 transitions. [2021-11-07 07:40:36,232 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 175 transitions. Word has length 53 [2021-11-07 07:40:36,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:40:36,232 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 175 transitions. [2021-11-07 07:40:36,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 28 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:36,233 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 175 transitions. [2021-11-07 07:40:36,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 07:40:36,233 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:40:36,233 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:40:36,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-07 07:40:36,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-07 07:40:36,434 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:40:36,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:40:36,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1706016300, now seen corresponding path program 14 times [2021-11-07 07:40:36,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:40:36,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301790371] [2021-11-07 07:40:36,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:40:36,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:40:36,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:40:37,062 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:40:37,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:40:37,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301790371] [2021-11-07 07:40:37,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301790371] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:40:37,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57458620] [2021-11-07 07:40:37,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:40:37,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:40:37,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:40:37,067 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:40:37,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 07:40:37,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:40:37,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:40:37,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-07 07:40:37,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:40:38,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:40:38,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:40:38,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:40:38,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:40:38,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-07 07:40:38,316 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-07 07:40:38,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-11-07 07:40:38,487 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-07 07:40:38,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:40:38,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-11-07 07:40:38,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186849148] [2021-11-07 07:40:38,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 07:40:38,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:40:38,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 07:40:38,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-11-07 07:40:38,491 INFO L87 Difference]: Start difference. First operand 149 states and 175 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:40,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:40:40,525 INFO L93 Difference]: Finished difference Result 232 states and 258 transitions. [2021-11-07 07:40:40,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-07 07:40:40,526 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 07:40:40,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:40:40,528 INFO L225 Difference]: With dead ends: 232 [2021-11-07 07:40:40,528 INFO L226 Difference]: Without dead ends: 230 [2021-11-07 07:40:40,529 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=596, Invalid=4096, Unknown=0, NotChecked=0, Total=4692 [2021-11-07 07:40:40,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-07 07:40:40,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 111. [2021-11-07 07:40:40,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1636363636363636) internal successors, (128), 110 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) [2021-11-07 07:40:40,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 128 transitions. [2021-11-07 07:40:40,573 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 128 transitions. Word has length 58 [2021-11-07 07:40:40,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:40:40,574 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 128 transitions. [2021-11-07 07:40:40,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:40,574 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 128 transitions. [2021-11-07 07:40:40,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 07:40:40,575 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:40:40,575 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:40:40,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-07 07:40:40,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:40:40,798 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:40:40,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:40:40,799 INFO L85 PathProgramCache]: Analyzing trace with hash 72917472, now seen corresponding path program 5 times [2021-11-07 07:40:40,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:40:40,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198630048] [2021-11-07 07:40:40,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:40:40,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:40:40,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:40:41,404 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:40:41,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:40:41,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198630048] [2021-11-07 07:40:41,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198630048] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:40:41,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127537334] [2021-11-07 07:40:41,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:40:41,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:40:41,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:40:41,407 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:40:41,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-07 07:40:42,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-07 07:40:42,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:40:42,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-07 07:40:42,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:40:42,264 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 [2021-11-07 07:40:42,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:40:42,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:40:42,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:40:42,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:40:42,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:40:42,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-07 07:40:42,843 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 39 treesize of output 27 [2021-11-07 07:40:42,918 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:40:42,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127537334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:40:42,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:40:42,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 17] total 34 [2021-11-07 07:40:42,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963424261] [2021-11-07 07:40:42,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-07 07:40:42,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:40:42,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-07 07:40:42,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 07:40:42,922 INFO L87 Difference]: Start difference. First operand 111 states and 128 transitions. Second operand has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 34 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:44,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:40:44,533 INFO L93 Difference]: Finished difference Result 183 states and 203 transitions. [2021-11-07 07:40:44,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-07 07:40:44,533 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 34 states have internal predecessors, (104), 0 states have call successors, (0), 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 62 [2021-11-07 07:40:44,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:40:44,535 INFO L225 Difference]: With dead ends: 183 [2021-11-07 07:40:44,535 INFO L226 Difference]: Without dead ends: 156 [2021-11-07 07:40:44,536 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=620, Invalid=4072, Unknown=0, NotChecked=0, Total=4692 [2021-11-07 07:40:44,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-07 07:40:44,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 121. [2021-11-07 07:40:44,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.1583333333333334) internal successors, (139), 120 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:44,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 139 transitions. [2021-11-07 07:40:44,606 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 139 transitions. Word has length 62 [2021-11-07 07:40:44,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:40:44,606 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 139 transitions. [2021-11-07 07:40:44,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 34 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:44,607 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 139 transitions. [2021-11-07 07:40:44,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 07:40:44,608 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:40:44,608 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:40:44,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-07 07:40:44,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-07 07:40:44,818 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:40:44,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:40:44,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1996145506, now seen corresponding path program 15 times [2021-11-07 07:40:44,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:40:44,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277498211] [2021-11-07 07:40:44,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:40:44,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:40:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:40:45,361 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:40:45,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:40:45,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277498211] [2021-11-07 07:40:45,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277498211] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:40:45,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870548560] [2021-11-07 07:40:45,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:40:45,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:40:45,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:40:45,364 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:40:45,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-07 07:40:46,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-07 07:40:46,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:40:46,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 07:40:46,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:40:46,435 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 [2021-11-07 07:40:47,290 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-07 07:40:47,291 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 76 treesize of output 39 [2021-11-07 07:40:47,353 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 45 proven. 56 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-07 07:40:47,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870548560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:40:47,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:40:47,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18] total 42 [2021-11-07 07:40:47,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613124659] [2021-11-07 07:40:47,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-07 07:40:47,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:40:47,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-07 07:40:47,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1528, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 07:40:47,357 INFO L87 Difference]: Start difference. First operand 121 states and 139 transitions. Second operand has 42 states, 42 states have (on average 2.5952380952380953) internal successors, (109), 42 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:50,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:40:50,964 INFO L93 Difference]: Finished difference Result 233 states and 263 transitions. [2021-11-07 07:40:50,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-07 07:40:50,965 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.5952380952380953) internal successors, (109), 42 states have internal predecessors, (109), 0 states have call successors, (0), 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 62 [2021-11-07 07:40:50,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:40:50,966 INFO L225 Difference]: With dead ends: 233 [2021-11-07 07:40:50,966 INFO L226 Difference]: Without dead ends: 169 [2021-11-07 07:40:50,968 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2734 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1435, Invalid=9277, Unknown=0, NotChecked=0, Total=10712 [2021-11-07 07:40:50,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-07 07:40:51,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 81. [2021-11-07 07:40:51,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.175) internal successors, (94), 80 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:51,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2021-11-07 07:40:51,016 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 62 [2021-11-07 07:40:51,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:40:51,016 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2021-11-07 07:40:51,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.5952380952380953) internal successors, (109), 42 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:51,017 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2021-11-07 07:40:51,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 07:40:51,017 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:40:51,018 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:40:51,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-07 07:40:51,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:40:51,231 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:40:51,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:40:51,231 INFO L85 PathProgramCache]: Analyzing trace with hash -631790128, now seen corresponding path program 16 times [2021-11-07 07:40:51,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:40:51,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403046134] [2021-11-07 07:40:51,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:40:51,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:40:51,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:40:51,951 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:40:51,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:40:51,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403046134] [2021-11-07 07:40:51,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403046134] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:40:51,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553030033] [2021-11-07 07:40:51,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:40:51,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:40:51,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:40:51,953 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:40:51,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 07:40:52,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:40:52,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:40:52,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-07 07:40:52,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:40:52,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:40:52,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:40:52,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:40:52,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:40:53,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-07 07:40:53,207 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-07 07:40:53,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-11-07 07:40:53,371 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-07 07:40:53,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:40:53,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-11-07 07:40:53,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688722260] [2021-11-07 07:40:53,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-07 07:40:53,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:40:53,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-07 07:40:53,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=979, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 07:40:53,374 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:55,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:40:55,533 INFO L93 Difference]: Finished difference Result 170 states and 186 transitions. [2021-11-07 07:40:55,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-07 07:40:55,534 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 07:40:55,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:40:55,535 INFO L225 Difference]: With dead ends: 170 [2021-11-07 07:40:55,535 INFO L226 Difference]: Without dead ends: 168 [2021-11-07 07:40:55,536 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=651, Invalid=4751, Unknown=0, NotChecked=0, Total=5402 [2021-11-07 07:40:55,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-07 07:40:55,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 84. [2021-11-07 07:40:55,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1927710843373494) internal successors, (99), 83 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:55,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 99 transitions. [2021-11-07 07:40:55,568 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 99 transitions. Word has length 67 [2021-11-07 07:40:55,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:40:55,568 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 99 transitions. [2021-11-07 07:40:55,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:55,568 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 99 transitions. [2021-11-07 07:40:55,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 07:40:55,569 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:40:55,569 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:40:55,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-07 07:40:55,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:40:55,774 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:40:55,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:40:55,775 INFO L85 PathProgramCache]: Analyzing trace with hash -36679072, now seen corresponding path program 17 times [2021-11-07 07:40:55,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:40:55,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315170660] [2021-11-07 07:40:55,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:40:55,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:40:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:40:55,986 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 73 proven. 68 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-07 07:40:55,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:40:55,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315170660] [2021-11-07 07:40:55,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315170660] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:40:55,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634070329] [2021-11-07 07:40:55,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:40:55,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:40:55,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:40:55,991 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:40:56,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-07 07:40:57,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-07 07:40:57,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:40:57,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 07:40:57,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:40:57,604 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 92 proven. 49 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-07 07:40:57,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634070329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:40:57,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:40:57,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2021-11-07 07:40:57,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682533385] [2021-11-07 07:40:57,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-07 07:40:57,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:40:57,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-07 07:40:57,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-11-07 07:40:57,608 INFO L87 Difference]: Start difference. First operand 84 states and 99 transitions. Second operand has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 28 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:58,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:40:58,024 INFO L93 Difference]: Finished difference Result 238 states and 277 transitions. [2021-11-07 07:40:58,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 07:40:58,025 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 28 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 07:40:58,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:40:58,026 INFO L225 Difference]: With dead ends: 238 [2021-11-07 07:40:58,026 INFO L226 Difference]: Without dead ends: 196 [2021-11-07 07:40:58,027 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=951, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 07:40:58,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-07 07:40:58,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 141. [2021-11-07 07:40:58,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.1928571428571428) internal successors, (167), 140 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:58,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 167 transitions. [2021-11-07 07:40:58,104 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 167 transitions. Word has length 70 [2021-11-07 07:40:58,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:40:58,104 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 167 transitions. [2021-11-07 07:40:58,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 28 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:58,105 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 167 transitions. [2021-11-07 07:40:58,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 07:40:58,106 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:40:58,106 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:40:58,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-07 07:40:58,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-07 07:40:58,310 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:40:58,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:40:58,311 INFO L85 PathProgramCache]: Analyzing trace with hash -695424892, now seen corresponding path program 6 times [2021-11-07 07:40:58,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:40:58,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056041316] [2021-11-07 07:40:58,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:40:58,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:40:58,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:40:59,076 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:40:59,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:40:59,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056041316] [2021-11-07 07:40:59,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056041316] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:40:59,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963447452] [2021-11-07 07:40:59,076 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:40:59,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:40:59,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:40:59,082 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:40:59,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-07 07:41:00,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-07 07:41:00,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:41:00,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-07 07:41:00,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:41:00,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-07 07:41:01,518 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-11-07 07:41:01,518 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 53 treesize of output 42 [2021-11-07 07:41:01,569 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 13 proven. 142 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-07 07:41:01,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963447452] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:01,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:41:01,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 23] total 44 [2021-11-07 07:41:01,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505608524] [2021-11-07 07:41:01,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-07 07:41:01,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:41:01,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-07 07:41:01,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1606, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 07:41:01,572 INFO L87 Difference]: Start difference. First operand 141 states and 167 transitions. Second operand has 44 states, 44 states have (on average 2.8863636363636362) internal successors, (127), 44 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) [2021-11-07 07:41:04,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:41:04,596 INFO L93 Difference]: Finished difference Result 254 states and 285 transitions. [2021-11-07 07:41:04,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-07 07:41:04,597 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.8863636363636362) internal successors, (127), 44 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 71 [2021-11-07 07:41:04,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:41:04,599 INFO L225 Difference]: With dead ends: 254 [2021-11-07 07:41:04,599 INFO L226 Difference]: Without dead ends: 223 [2021-11-07 07:41:04,600 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2845 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1475, Invalid=9031, Unknown=0, NotChecked=0, Total=10506 [2021-11-07 07:41:04,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-07 07:41:04,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 151. [2021-11-07 07:41:04,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.18) internal successors, (177), 150 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) [2021-11-07 07:41:04,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 177 transitions. [2021-11-07 07:41:04,680 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 177 transitions. Word has length 71 [2021-11-07 07:41:04,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:41:04,680 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 177 transitions. [2021-11-07 07:41:04,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.8863636363636362) internal successors, (127), 44 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) [2021-11-07 07:41:04,680 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 177 transitions. [2021-11-07 07:41:04,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 07:41:04,681 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:41:04,681 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:41:04,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-07 07:41:04,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-07 07:41:04,886 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:41:04,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:41:04,887 INFO L85 PathProgramCache]: Analyzing trace with hash 6174982, now seen corresponding path program 18 times [2021-11-07 07:41:04,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:41:04,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966886911] [2021-11-07 07:41:04,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:41:04,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:41:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:41:05,531 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:41:05,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:41:05,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966886911] [2021-11-07 07:41:05,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966886911] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:05,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811134192] [2021-11-07 07:41:05,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:41:05,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:05,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:41:05,533 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:41:05,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 07:41:06,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-07 07:41:06,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:41:06,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 07:41:06,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:41:07,062 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 [2021-11-07 07:41:08,125 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-07 07:41:08,126 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 95 treesize of output 42 [2021-11-07 07:41:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 85 proven. 55 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-07 07:41:08,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811134192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:08,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:41:08,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23] total 50 [2021-11-07 07:41:08,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246023231] [2021-11-07 07:41:08,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-07 07:41:08,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:41:08,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-07 07:41:08,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=2176, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 07:41:08,180 INFO L87 Difference]: Start difference. First operand 151 states and 177 transitions. Second operand has 50 states, 50 states have (on average 2.44) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:13,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:41:13,674 INFO L93 Difference]: Finished difference Result 330 states and 369 transitions. [2021-11-07 07:41:13,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-07 07:41:13,674 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.44) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 07:41:13,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:41:13,676 INFO L225 Difference]: With dead ends: 330 [2021-11-07 07:41:13,676 INFO L226 Difference]: Without dead ends: 255 [2021-11-07 07:41:13,677 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5523 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2482, Invalid=17258, Unknown=0, NotChecked=0, Total=19740 [2021-11-07 07:41:13,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-11-07 07:41:13,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 130. [2021-11-07 07:41:13,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.178294573643411) internal successors, (152), 129 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:13,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 152 transitions. [2021-11-07 07:41:13,757 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 152 transitions. Word has length 71 [2021-11-07 07:41:13,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:41:13,758 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 152 transitions. [2021-11-07 07:41:13,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.44) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:13,758 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 152 transitions. [2021-11-07 07:41:13,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 07:41:13,760 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:41:13,760 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:41:13,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-07 07:41:13,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:13,986 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:41:13,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:41:13,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1513735842, now seen corresponding path program 19 times [2021-11-07 07:41:13,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:41:13,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033544285] [2021-11-07 07:41:13,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:41:13,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:41:14,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:41:15,016 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 1 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:41:15,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:41:15,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033544285] [2021-11-07 07:41:15,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033544285] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:15,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252874361] [2021-11-07 07:41:15,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:41:15,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:15,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:41:15,022 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:41:15,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-07 07:41:16,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:41:16,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-07 07:41:16,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:41:16,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:41:16,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:41:16,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:41:16,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:41:16,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:41:16,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-07 07:41:16,578 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-07 07:41:16,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 37 [2021-11-07 07:41:16,680 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-07 07:41:16,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-11-07 07:41:16,816 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-07 07:41:16,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:41:16,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-11-07 07:41:16,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614124322] [2021-11-07 07:41:16,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-07 07:41:16,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:41:16,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-07 07:41:16,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 07:41:16,818 INFO L87 Difference]: Start difference. First operand 130 states and 152 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:19,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:41:19,175 INFO L93 Difference]: Finished difference Result 283 states and 311 transitions. [2021-11-07 07:41:19,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-07 07:41:19,176 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-11-07 07:41:19,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:41:19,177 INFO L225 Difference]: With dead ends: 283 [2021-11-07 07:41:19,177 INFO L226 Difference]: Without dead ends: 281 [2021-11-07 07:41:19,178 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1691 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=806, Invalid=6166, Unknown=0, NotChecked=0, Total=6972 [2021-11-07 07:41:19,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-07 07:41:19,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 136. [2021-11-07 07:41:19,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.2) internal successors, (162), 135 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:19,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 162 transitions. [2021-11-07 07:41:19,243 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 162 transitions. Word has length 72 [2021-11-07 07:41:19,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:41:19,243 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 162 transitions. [2021-11-07 07:41:19,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:19,243 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 162 transitions. [2021-11-07 07:41:19,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 07:41:19,244 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:41:19,244 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:41:19,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-07 07:41:19,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-07 07:41:19,446 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:41:19,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:41:19,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1766495214, now seen corresponding path program 20 times [2021-11-07 07:41:19,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:41:19,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750939930] [2021-11-07 07:41:19,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:41:19,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:41:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:41:19,731 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 95 proven. 86 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-07 07:41:19,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:41:19,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750939930] [2021-11-07 07:41:19,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750939930] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:19,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498720136] [2021-11-07 07:41:19,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:41:19,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:19,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:41:19,739 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:41:19,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-07 07:41:20,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:41:20,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:41:20,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 07:41:20,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:41:21,316 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 117 proven. 64 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-07 07:41:21,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498720136] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:21,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:41:21,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2021-11-07 07:41:21,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196857212] [2021-11-07 07:41:21,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-07 07:41:21,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:41:21,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-07 07:41:21,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=705, Unknown=0, NotChecked=0, Total=930 [2021-11-07 07:41:21,318 INFO L87 Difference]: Start difference. First operand 136 states and 162 transitions. Second operand has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 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) [2021-11-07 07:41:21,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:41:21,918 INFO L93 Difference]: Finished difference Result 418 states and 488 transitions. [2021-11-07 07:41:21,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 07:41:21,919 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 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) Word has length 75 [2021-11-07 07:41:21,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:41:21,921 INFO L225 Difference]: With dead ends: 418 [2021-11-07 07:41:21,921 INFO L226 Difference]: Without dead ends: 339 [2021-11-07 07:41:21,921 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=1182, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 07:41:21,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-11-07 07:41:22,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 237. [2021-11-07 07:41:22,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.1864406779661016) internal successors, (280), 236 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:22,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 280 transitions. [2021-11-07 07:41:22,075 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 280 transitions. Word has length 75 [2021-11-07 07:41:22,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:41:22,075 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 280 transitions. [2021-11-07 07:41:22,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 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) [2021-11-07 07:41:22,075 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 280 transitions. [2021-11-07 07:41:22,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 07:41:22,076 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:41:22,077 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:41:22,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-07 07:41:22,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:22,277 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:41:22,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:41:22,278 INFO L85 PathProgramCache]: Analyzing trace with hash -2078517868, now seen corresponding path program 21 times [2021-11-07 07:41:22,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:41:22,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339262966] [2021-11-07 07:41:22,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:41:22,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:41:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:41:23,071 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:41:23,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:41:23,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339262966] [2021-11-07 07:41:23,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339262966] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:23,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323047763] [2021-11-07 07:41:23,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:41:23,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:23,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:41:23,073 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:41:23,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-07 07:41:24,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-07 07:41:24,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:41:24,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-07 07:41:24,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:41:24,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-07 07:41:24,940 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-07 07:41:24,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-07 07:41:26,327 INFO L354 Elim1Store]: treesize reduction 44, result has 6.4 percent of original size [2021-11-07 07:41:26,327 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 110 treesize of output 42 [2021-11-07 07:41:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 38 proven. 139 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-07 07:41:26,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323047763] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:26,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:41:26,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 28] total 52 [2021-11-07 07:41:26,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273836352] [2021-11-07 07:41:26,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-07 07:41:26,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:41:26,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-07 07:41:26,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=2323, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 07:41:26,379 INFO L87 Difference]: Start difference. First operand 237 states and 280 transitions. Second operand has 52 states, 52 states have (on average 2.269230769230769) internal successors, (118), 52 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:35,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:41:35,344 INFO L93 Difference]: Finished difference Result 496 states and 555 transitions. [2021-11-07 07:41:35,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-11-07 07:41:35,344 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.269230769230769) internal successors, (118), 52 states have internal predecessors, (118), 0 states have call successors, (0), 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 [2021-11-07 07:41:35,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:41:35,346 INFO L225 Difference]: With dead ends: 496 [2021-11-07 07:41:35,346 INFO L226 Difference]: Without dead ends: 461 [2021-11-07 07:41:35,349 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18465 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=3673, Invalid=47177, Unknown=0, NotChecked=0, Total=50850 [2021-11-07 07:41:35,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-11-07 07:41:35,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 188. [2021-11-07 07:41:35,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.1711229946524064) internal successors, (219), 187 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:35,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 219 transitions. [2021-11-07 07:41:35,449 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 219 transitions. Word has length 76 [2021-11-07 07:41:35,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:41:35,449 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 219 transitions. [2021-11-07 07:41:35,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.269230769230769) internal successors, (118), 52 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:35,449 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 219 transitions. [2021-11-07 07:41:35,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 07:41:35,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:41:35,450 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:41:35,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-07 07:41:35,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-07 07:41:35,655 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:41:35,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:41:35,655 INFO L85 PathProgramCache]: Analyzing trace with hash -873581612, now seen corresponding path program 22 times [2021-11-07 07:41:35,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:41:35,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311056238] [2021-11-07 07:41:35,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:41:35,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:41:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:41:36,894 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 4 proven. 244 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:41:36,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:41:36,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311056238] [2021-11-07 07:41:36,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311056238] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:36,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582902729] [2021-11-07 07:41:36,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:41:36,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:36,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:41:36,899 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:41:36,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-07 07:41:38,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:41:38,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:41:38,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-07 07:41:38,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:41:38,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:41:38,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:41:38,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:41:38,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:41:38,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-07 07:41:38,681 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-07 07:41:38,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 37 [2021-11-07 07:41:38,787 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-07 07:41:38,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 37 [2021-11-07 07:41:38,894 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-07 07:41:38,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-11-07 07:41:39,036 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-07 07:41:39,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:41:39,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-11-07 07:41:39,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118495321] [2021-11-07 07:41:39,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-07 07:41:39,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:41:39,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-07 07:41:39,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1363, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 07:41:39,039 INFO L87 Difference]: Start difference. First operand 188 states and 219 transitions. Second operand has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:42,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:41:42,736 INFO L93 Difference]: Finished difference Result 307 states and 340 transitions. [2021-11-07 07:41:42,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-07 07:41:42,736 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 07:41:42,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:41:42,738 INFO L225 Difference]: With dead ends: 307 [2021-11-07 07:41:42,738 INFO L226 Difference]: Without dead ends: 305 [2021-11-07 07:41:42,739 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3131 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1094, Invalid=10248, Unknown=0, NotChecked=0, Total=11342 [2021-11-07 07:41:42,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-11-07 07:41:42,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 192. [2021-11-07 07:41:42,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.1832460732984293) internal successors, (226), 191 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:42,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 226 transitions. [2021-11-07 07:41:42,840 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 226 transitions. Word has length 77 [2021-11-07 07:41:42,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:41:42,841 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 226 transitions. [2021-11-07 07:41:42,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:42,841 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 226 transitions. [2021-11-07 07:41:42,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 07:41:42,842 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:41:42,842 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:41:42,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-07 07:41:43,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-07 07:41:43,042 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:41:43,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:41:43,043 INFO L85 PathProgramCache]: Analyzing trace with hash 122414920, now seen corresponding path program 7 times [2021-11-07 07:41:43,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:41:43,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754565798] [2021-11-07 07:41:43,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:41:43,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:41:43,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:41:43,808 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:41:43,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:41:43,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754565798] [2021-11-07 07:41:43,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754565798] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:43,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254221694] [2021-11-07 07:41:43,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:41:43,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:43,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:41:43,810 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:41:43,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-07 07:41:45,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:41:45,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-07 07:41:45,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:41:45,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:41:45,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:41:45,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:41:45,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:41:45,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:41:45,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:41:45,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:41:45,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-07 07:41:45,915 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 39 treesize of output 27 [2021-11-07 07:41:45,955 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:41:45,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254221694] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:45,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:41:45,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 21] total 42 [2021-11-07 07:41:45,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512108115] [2021-11-07 07:41:45,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-07 07:41:45,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:41:45,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-07 07:41:45,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1545, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 07:41:45,957 INFO L87 Difference]: Start difference. First operand 192 states and 226 transitions. Second operand has 42 states, 42 states have (on average 3.261904761904762) internal successors, (137), 42 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:48,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:41:48,355 INFO L93 Difference]: Finished difference Result 315 states and 356 transitions. [2021-11-07 07:41:48,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-07 07:41:48,362 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.261904761904762) internal successors, (137), 42 states have internal predecessors, (137), 0 states have call successors, (0), 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 [2021-11-07 07:41:48,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:41:48,364 INFO L225 Difference]: With dead ends: 315 [2021-11-07 07:41:48,364 INFO L226 Difference]: Without dead ends: 277 [2021-11-07 07:41:48,366 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1809 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=843, Invalid=6639, Unknown=0, NotChecked=0, Total=7482 [2021-11-07 07:41:48,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-11-07 07:41:48,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 230. [2021-11-07 07:41:48,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.1703056768558953) internal successors, (268), 229 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:48,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 268 transitions. [2021-11-07 07:41:48,518 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 268 transitions. Word has length 80 [2021-11-07 07:41:48,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:41:48,518 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 268 transitions. [2021-11-07 07:41:48,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.261904761904762) internal successors, (137), 42 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:48,518 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 268 transitions. [2021-11-07 07:41:48,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 07:41:48,519 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:41:48,519 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:41:48,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-07 07:41:48,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-07 07:41:48,720 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:41:48,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:41:48,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1750949880, now seen corresponding path program 23 times [2021-11-07 07:41:48,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:41:48,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785921951] [2021-11-07 07:41:48,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:41:48,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:41:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:41:49,624 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:41:49,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:41:49,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785921951] [2021-11-07 07:41:49,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785921951] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:49,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276375164] [2021-11-07 07:41:49,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:41:49,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:49,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:41:49,625 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:41:49,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-07 07:41:51,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-07 07:41:51,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:41:51,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-07 07:41:51,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:41:51,495 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 [2021-11-07 07:41:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-07 07:41:51,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276375164] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:51,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:41:51,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 20] total 40 [2021-11-07 07:41:51,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747574399] [2021-11-07 07:41:51,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-07 07:41:51,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:41:51,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-07 07:41:51,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1397, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 07:41:52,000 INFO L87 Difference]: Start difference. First operand 230 states and 268 transitions. Second operand has 40 states, 40 states have (on average 3.425) internal successors, (137), 40 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:54,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:41:54,750 INFO L93 Difference]: Finished difference Result 358 states and 400 transitions. [2021-11-07 07:41:54,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-07 07:41:54,750 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.425) internal successors, (137), 40 states have internal predecessors, (137), 0 states have call successors, (0), 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 [2021-11-07 07:41:54,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:41:54,752 INFO L225 Difference]: With dead ends: 358 [2021-11-07 07:41:54,752 INFO L226 Difference]: Without dead ends: 293 [2021-11-07 07:41:54,753 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2143 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=924, Invalid=7632, Unknown=0, NotChecked=0, Total=8556 [2021-11-07 07:41:54,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-07 07:41:54,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 181. [2021-11-07 07:41:54,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.1944444444444444) internal successors, (215), 180 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:54,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 215 transitions. [2021-11-07 07:41:54,856 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 215 transitions. Word has length 80 [2021-11-07 07:41:54,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:41:54,856 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 215 transitions. [2021-11-07 07:41:54,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.425) internal successors, (137), 40 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:54,856 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 215 transitions. [2021-11-07 07:41:54,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 07:41:54,857 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:41:54,857 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:41:54,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-07 07:41:55,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-07 07:41:55,058 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:41:55,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:41:55,059 INFO L85 PathProgramCache]: Analyzing trace with hash -586623524, now seen corresponding path program 24 times [2021-11-07 07:41:55,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:41:55,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891839064] [2021-11-07 07:41:55,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:41:55,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:41:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:41:55,349 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 120 proven. 106 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-07 07:41:55,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:41:55,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891839064] [2021-11-07 07:41:55,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891839064] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:55,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539020927] [2021-11-07 07:41:55,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:41:55,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:55,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:41:55,351 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:41:55,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-07 07:41:56,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-07 07:41:56,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:41:56,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 07:41:56,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:41:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 145 proven. 81 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-07 07:41:57,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539020927] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:57,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:41:57,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 34 [2021-11-07 07:41:57,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612244874] [2021-11-07 07:41:57,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-07 07:41:57,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:41:57,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-07 07:41:57,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=853, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 07:41:57,375 INFO L87 Difference]: Start difference. First operand 181 states and 215 transitions. Second operand has 34 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 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) [2021-11-07 07:41:58,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:41:58,051 INFO L93 Difference]: Finished difference Result 498 states and 584 transitions. [2021-11-07 07:41:58,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 07:41:58,052 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 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 80 [2021-11-07 07:41:58,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:41:58,054 INFO L225 Difference]: With dead ends: 498 [2021-11-07 07:41:58,054 INFO L226 Difference]: Without dead ends: 390 [2021-11-07 07:41:58,054 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=454, Invalid=1438, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 07:41:58,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-07 07:41:58,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 293. [2021-11-07 07:41:58,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.1815068493150684) internal successors, (345), 292 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:58,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 345 transitions. [2021-11-07 07:41:58,307 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 345 transitions. Word has length 80 [2021-11-07 07:41:58,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:41:58,308 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 345 transitions. [2021-11-07 07:41:58,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 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) [2021-11-07 07:41:58,308 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 345 transitions. [2021-11-07 07:41:58,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 07:41:58,310 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:41:58,310 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:41:58,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-07 07:41:58,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:58,527 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:41:58,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:41:58,527 INFO L85 PathProgramCache]: Analyzing trace with hash 172005210, now seen corresponding path program 25 times [2021-11-07 07:41:58,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:41:58,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780285951] [2021-11-07 07:41:58,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:41:58,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:41:58,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:41:59,741 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 9 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:41:59,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:41:59,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780285951] [2021-11-07 07:41:59,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780285951] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:59,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998814688] [2021-11-07 07:41:59,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:41:59,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:59,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:41:59,744 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:41:59,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-07 07:42:01,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:01,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-07 07:42:01,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:42:01,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:42:01,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:42:01,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:42:01,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:42:01,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:42:01,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-07 07:42:01,597 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-07 07:42:01,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 37 [2021-11-07 07:42:01,729 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-07 07:42:01,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 37 [2021-11-07 07:42:01,840 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-07 07:42:01,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 37 [2021-11-07 07:42:02,002 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-07 07:42:02,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-11-07 07:42:02,268 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-07 07:42:02,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:42:02,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-11-07 07:42:02,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492252546] [2021-11-07 07:42:02,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-07 07:42:02,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:02,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-07 07:42:02,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1576, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 07:42:02,271 INFO L87 Difference]: Start difference. First operand 293 states and 345 transitions. Second operand has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:07,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:07,051 INFO L93 Difference]: Finished difference Result 525 states and 584 transitions. [2021-11-07 07:42:07,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-07 07:42:07,052 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 07:42:07,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:07,054 INFO L225 Difference]: With dead ends: 525 [2021-11-07 07:42:07,054 INFO L226 Difference]: Without dead ends: 523 [2021-11-07 07:42:07,055 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3937 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1322, Invalid=12484, Unknown=0, NotChecked=0, Total=13806 [2021-11-07 07:42:07,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-11-07 07:42:07,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 303. [2021-11-07 07:42:07,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.1986754966887416) internal successors, (362), 302 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:07,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 362 transitions. [2021-11-07 07:42:07,253 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 362 transitions. Word has length 82 [2021-11-07 07:42:07,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:07,254 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 362 transitions. [2021-11-07 07:42:07,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:07,254 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 362 transitions. [2021-11-07 07:42:07,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 07:42:07,255 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:07,255 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:42:07,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-07 07:42:07,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:42:07,470 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:07,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:07,471 INFO L85 PathProgramCache]: Analyzing trace with hash 269912896, now seen corresponding path program 26 times [2021-11-07 07:42:07,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:07,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53220897] [2021-11-07 07:42:07,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:07,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:08,560 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:08,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:08,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53220897] [2021-11-07 07:42:08,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53220897] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:08,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064609989] [2021-11-07 07:42:08,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:42:08,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:42:08,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:42:08,562 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:42:08,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-07 07:42:10,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:42:10,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:42:10,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-07 07:42:10,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:42:10,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:42:10,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:42:10,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:42:10,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:42:10,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:42:10,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:42:10,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:42:10,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-07 07:42:10,537 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-07 07:42:10,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-11-07 07:42:10,720 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-07 07:42:10,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:42:10,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-11-07 07:42:10,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548108243] [2021-11-07 07:42:10,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-07 07:42:10,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:10,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-07 07:42:10,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1382, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 07:42:10,722 INFO L87 Difference]: Start difference. First operand 303 states and 362 transitions. Second operand has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 36 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:13,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:13,745 INFO L93 Difference]: Finished difference Result 381 states and 437 transitions. [2021-11-07 07:42:13,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-07 07:42:13,746 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 36 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-07 07:42:13,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:13,748 INFO L225 Difference]: With dead ends: 381 [2021-11-07 07:42:13,748 INFO L226 Difference]: Without dead ends: 379 [2021-11-07 07:42:13,749 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1716 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=839, Invalid=6993, Unknown=0, NotChecked=0, Total=7832 [2021-11-07 07:42:13,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-11-07 07:42:13,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 267. [2021-11-07 07:42:13,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.218045112781955) internal successors, (324), 266 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:13,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 324 transitions. [2021-11-07 07:42:13,941 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 324 transitions. Word has length 85 [2021-11-07 07:42:13,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:13,942 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 324 transitions. [2021-11-07 07:42:13,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 36 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:13,942 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 324 transitions. [2021-11-07 07:42:13,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 07:42:13,943 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:13,944 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:42:13,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-07 07:42:14,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:42:14,145 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:14,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:14,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1387560086, now seen corresponding path program 27 times [2021-11-07 07:42:14,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:14,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849243043] [2021-11-07 07:42:14,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:14,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:14,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:14,475 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 148 proven. 128 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-07 07:42:14,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:14,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849243043] [2021-11-07 07:42:14,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849243043] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:14,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590699956] [2021-11-07 07:42:14,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:42:14,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:42:14,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:42:14,477 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:42:14,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-07 07:42:16,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-07 07:42:16,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:42:16,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-07 07:42:16,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:42:16,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-07 07:42:16,786 INFO L354 Elim1Store]: treesize reduction 57, result has 17.4 percent of original size [2021-11-07 07:42:16,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 27 [2021-11-07 07:42:16,864 INFO L354 Elim1Store]: treesize reduction 57, result has 17.4 percent of original size [2021-11-07 07:42:16,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 27 [2021-11-07 07:42:16,943 INFO L354 Elim1Store]: treesize reduction 57, result has 17.4 percent of original size [2021-11-07 07:42:16,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 27 [2021-11-07 07:42:17,065 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-07 07:42:17,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-07 07:42:18,261 INFO L354 Elim1Store]: treesize reduction 44, result has 6.4 percent of original size [2021-11-07 07:42:18,262 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 110 treesize of output 42 [2021-11-07 07:42:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 95 proven. 180 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-07 07:42:18,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590699956] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:18,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:42:18,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 32] total 54 [2021-11-07 07:42:18,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677476410] [2021-11-07 07:42:18,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-07 07:42:18,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:18,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-07 07:42:18,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=2450, Unknown=0, NotChecked=0, Total=2862 [2021-11-07 07:42:18,316 INFO L87 Difference]: Start difference. First operand 267 states and 324 transitions. Second operand has 54 states, 54 states have (on average 2.425925925925926) internal successors, (131), 54 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:48,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:48,081 INFO L93 Difference]: Finished difference Result 1281 states and 1575 transitions. [2021-11-07 07:42:48,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 564 states. [2021-11-07 07:42:48,082 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.425925925925926) internal successors, (131), 54 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-07 07:42:48,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:48,090 INFO L225 Difference]: With dead ends: 1281 [2021-11-07 07:42:48,090 INFO L226 Difference]: Without dead ends: 1131 [2021-11-07 07:42:48,107 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 594 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156536 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=15755, Invalid=338865, Unknown=0, NotChecked=0, Total=354620 [2021-11-07 07:42:48,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-11-07 07:42:48,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 413. [2021-11-07 07:42:48,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 1.2135922330097086) internal successors, (500), 412 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:48,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 500 transitions. [2021-11-07 07:42:48,442 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 500 transitions. Word has length 85 [2021-11-07 07:42:48,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:48,442 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 500 transitions. [2021-11-07 07:42:48,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.425925925925926) internal successors, (131), 54 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:48,443 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 500 transitions. [2021-11-07 07:42:48,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 07:42:48,444 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:48,445 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:42:48,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-07 07:42:48,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:42:48,661 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:48,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:48,662 INFO L85 PathProgramCache]: Analyzing trace with hash -30410280, now seen corresponding path program 28 times [2021-11-07 07:42:48,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:48,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27279972] [2021-11-07 07:42:48,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:48,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:50,186 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 16 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:50,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:50,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27279972] [2021-11-07 07:42:50,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27279972] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:50,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390942451] [2021-11-07 07:42:50,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:42:50,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:42:50,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:42:50,189 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:42:50,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-07 07:42:51,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:42:51,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:42:51,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-07 07:42:51,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:42:51,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:42:51,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:42:51,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:42:52,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:42:52,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-07 07:42:52,230 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-07 07:42:52,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 37 [2021-11-07 07:42:52,345 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-07 07:42:52,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 37 [2021-11-07 07:42:52,463 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-07 07:42:52,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 37 [2021-11-07 07:42:52,688 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-07 07:42:52,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 37 [2021-11-07 07:42:52,806 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-07 07:42:52,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-11-07 07:42:52,957 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-07 07:42:52,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:42:52,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2021-11-07 07:42:52,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835845512] [2021-11-07 07:42:52,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-07 07:42:52,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:52,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-07 07:42:52,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1803, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 07:42:52,959 INFO L87 Difference]: Start difference. First operand 413 states and 500 transitions. Second operand has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 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) [2021-11-07 07:42:58,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:58,836 INFO L93 Difference]: Finished difference Result 770 states and 865 transitions. [2021-11-07 07:42:58,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-07 07:42:58,836 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 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) Word has length 87 [2021-11-07 07:42:58,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:58,840 INFO L225 Difference]: With dead ends: 770 [2021-11-07 07:42:58,840 INFO L226 Difference]: Without dead ends: 733 [2021-11-07 07:42:58,841 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4824 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1584, Invalid=14928, Unknown=0, NotChecked=0, Total=16512 [2021-11-07 07:42:58,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-11-07 07:42:59,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 423. [2021-11-07 07:42:59,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 1.2156398104265402) internal successors, (513), 422 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:59,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 513 transitions. [2021-11-07 07:42:59,136 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 513 transitions. Word has length 87 [2021-11-07 07:42:59,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:59,136 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 513 transitions. [2021-11-07 07:42:59,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 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) [2021-11-07 07:42:59,137 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 513 transitions. [2021-11-07 07:42:59,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 07:42:59,138 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:59,138 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:42:59,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-07 07:42:59,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-07 07:42:59,339 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:59,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:59,339 INFO L85 PathProgramCache]: Analyzing trace with hash 910882804, now seen corresponding path program 8 times [2021-11-07 07:42:59,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:59,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094511450] [2021-11-07 07:42:59,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:59,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:59,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:00,414 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:00,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:00,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094511450] [2021-11-07 07:43:00,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094511450] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:00,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487836876] [2021-11-07 07:43:00,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:43:00,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:00,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:00,417 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:00,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-07 07:43:02,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:43:02,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:43:02,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-07 07:43:02,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:02,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:43:02,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:43:02,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:43:02,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:43:02,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:43:02,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:43:02,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:43:02,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:43:02,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-07 07:43:03,196 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 39 treesize of output 27 [2021-11-07 07:43:03,242 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:43:03,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487836876] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:03,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:43:03,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 23] total 46 [2021-11-07 07:43:03,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062147902] [2021-11-07 07:43:03,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-07 07:43:03,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:03,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-07 07:43:03,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1870, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 07:43:03,244 INFO L87 Difference]: Start difference. First operand 423 states and 513 transitions. Second operand has 46 states, 46 states have (on average 3.3260869565217392) internal successors, (153), 46 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:06,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:06,483 INFO L93 Difference]: Finished difference Result 674 states and 778 transitions. [2021-11-07 07:43:06,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-07 07:43:06,484 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.3260869565217392) internal successors, (153), 46 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-07 07:43:06,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:06,487 INFO L225 Difference]: With dead ends: 674 [2021-11-07 07:43:06,487 INFO L226 Difference]: Without dead ends: 635 [2021-11-07 07:43:06,488 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2206 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=962, Invalid=8158, Unknown=0, NotChecked=0, Total=9120 [2021-11-07 07:43:06,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-07 07:43:06,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 483. [2021-11-07 07:43:06,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 1.2116182572614107) internal successors, (584), 482 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:06,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 584 transitions. [2021-11-07 07:43:06,824 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 584 transitions. Word has length 89 [2021-11-07 07:43:06,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:06,824 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 584 transitions. [2021-11-07 07:43:06,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.3260869565217392) internal successors, (153), 46 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:06,825 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 584 transitions. [2021-11-07 07:43:06,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 07:43:06,826 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:06,827 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:06,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-07 07:43:07,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:07,047 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:07,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:07,047 INFO L85 PathProgramCache]: Analyzing trace with hash -934484362, now seen corresponding path program 29 times [2021-11-07 07:43:07,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:07,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289907550] [2021-11-07 07:43:07,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:07,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:07,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:07,944 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:07,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:07,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289907550] [2021-11-07 07:43:07,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289907550] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:07,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759392717] [2021-11-07 07:43:07,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:43:07,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:07,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:07,946 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:07,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-07 07:43:09,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-07 07:43:09,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:43:09,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-07 07:43:09,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:10,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-07 07:43:10,739 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-07 07:43:10,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759392717] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:10,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:43:10,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 22] total 44 [2021-11-07 07:43:10,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596182835] [2021-11-07 07:43:10,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-07 07:43:10,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:10,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-07 07:43:10,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1707, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 07:43:10,741 INFO L87 Difference]: Start difference. First operand 483 states and 584 transitions. Second operand has 44 states, 44 states have (on average 3.477272727272727) internal successors, (153), 44 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:14,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:14,636 INFO L93 Difference]: Finished difference Result 956 states and 1077 transitions. [2021-11-07 07:43:14,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-07 07:43:14,637 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.477272727272727) internal successors, (153), 44 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-07 07:43:14,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:14,641 INFO L225 Difference]: With dead ends: 956 [2021-11-07 07:43:14,641 INFO L226 Difference]: Without dead ends: 881 [2021-11-07 07:43:14,642 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2643 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1058, Invalid=9448, Unknown=0, NotChecked=0, Total=10506 [2021-11-07 07:43:14,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2021-11-07 07:43:15,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 550. [2021-11-07 07:43:15,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 1.1967213114754098) internal successors, (657), 549 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:15,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 657 transitions. [2021-11-07 07:43:15,051 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 657 transitions. Word has length 89 [2021-11-07 07:43:15,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:15,051 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 657 transitions. [2021-11-07 07:43:15,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.477272727272727) internal successors, (153), 44 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:15,052 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 657 transitions. [2021-11-07 07:43:15,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 07:43:15,053 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:15,053 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:15,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-07 07:43:15,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-07 07:43:15,254 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:15,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:15,254 INFO L85 PathProgramCache]: Analyzing trace with hash -282588986, now seen corresponding path program 30 times [2021-11-07 07:43:15,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:15,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502310242] [2021-11-07 07:43:15,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:15,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:15,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:16,498 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 1 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:16,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:16,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502310242] [2021-11-07 07:43:16,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502310242] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:16,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492328714] [2021-11-07 07:43:16,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:43:16,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:16,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:16,502 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:16,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-07 07:43:18,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-07 07:43:18,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:43:18,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-07 07:43:18,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:19,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-07 07:43:19,211 INFO L354 Elim1Store]: treesize reduction 57, result has 17.4 percent of original size [2021-11-07 07:43:19,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 27 [2021-11-07 07:43:19,355 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-07 07:43:19,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-07 07:43:21,085 INFO L354 Elim1Store]: treesize reduction 44, result has 6.4 percent of original size [2021-11-07 07:43:21,085 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 110 treesize of output 42 [2021-11-07 07:43:21,143 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 66 proven. 207 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-07 07:43:21,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492328714] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:21,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:43:21,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 32] total 60 [2021-11-07 07:43:21,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599125582] [2021-11-07 07:43:21,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-07 07:43:21,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:21,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-07 07:43:21,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=3125, Unknown=0, NotChecked=0, Total=3540 [2021-11-07 07:43:21,145 INFO L87 Difference]: Start difference. First operand 550 states and 657 transitions. Second operand has 60 states, 60 states have (on average 2.35) internal successors, (141), 60 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:39,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:39,872 INFO L93 Difference]: Finished difference Result 1043 states and 1189 transitions. [2021-11-07 07:43:39,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2021-11-07 07:43:39,872 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.35) internal successors, (141), 60 states have internal predecessors, (141), 0 states have call successors, (0), 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 90 [2021-11-07 07:43:39,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:39,877 INFO L225 Difference]: With dead ends: 1043 [2021-11-07 07:43:39,877 INFO L226 Difference]: Without dead ends: 967 [2021-11-07 07:43:39,886 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37568 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=6008, Invalid=92902, Unknown=0, NotChecked=0, Total=98910 [2021-11-07 07:43:39,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-11-07 07:43:40,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 460. [2021-11-07 07:43:40,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 1.2178649237472767) internal successors, (559), 459 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:40,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 559 transitions. [2021-11-07 07:43:40,281 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 559 transitions. Word has length 90 [2021-11-07 07:43:40,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:40,281 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 559 transitions. [2021-11-07 07:43:40,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.35) internal successors, (141), 60 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:40,281 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 559 transitions. [2021-11-07 07:43:40,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 07:43:40,283 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:40,283 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:40,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-07 07:43:40,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-07 07:43:40,498 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:40,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:40,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1361781080, now seen corresponding path program 31 times [2021-11-07 07:43:40,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:40,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392220310] [2021-11-07 07:43:40,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:40,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:40,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:40,895 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 179 proven. 152 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-07 07:43:40,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:40,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392220310] [2021-11-07 07:43:40,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392220310] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:40,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254766772] [2021-11-07 07:43:40,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:43:40,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:40,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:40,898 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:40,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-07 07:43:43,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:43,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 07:43:43,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:43,787 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 210 proven. 121 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-07 07:43:43,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254766772] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:43,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:43:43,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2021-11-07 07:43:43,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630023039] [2021-11-07 07:43:43,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-07 07:43:43,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:43,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-07 07:43:43,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 07:43:43,789 INFO L87 Difference]: Start difference. First operand 460 states and 559 transitions. Second operand has 40 states, 40 states have (on average 2.775) internal successors, (111), 40 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:45,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:45,421 INFO L93 Difference]: Finished difference Result 1139 states and 1358 transitions. [2021-11-07 07:43:45,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-07 07:43:45,422 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.775) internal successors, (111), 40 states have internal predecessors, (111), 0 states have call successors, (0), 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 90 [2021-11-07 07:43:45,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:45,427 INFO L225 Difference]: With dead ends: 1139 [2021-11-07 07:43:45,427 INFO L226 Difference]: Without dead ends: 953 [2021-11-07 07:43:45,428 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=900, Invalid=3132, Unknown=0, NotChecked=0, Total=4032 [2021-11-07 07:43:45,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-11-07 07:43:46,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 652. [2021-11-07 07:43:46,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 651 states have (on average 1.2196620583717357) internal successors, (794), 651 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:46,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 794 transitions. [2021-11-07 07:43:46,005 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 794 transitions. Word has length 90 [2021-11-07 07:43:46,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:46,006 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 794 transitions. [2021-11-07 07:43:46,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.775) internal successors, (111), 40 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:46,006 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 794 transitions. [2021-11-07 07:43:46,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 07:43:46,008 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:46,009 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:46,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-07 07:43:46,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-07 07:43:46,223 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:46,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:46,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1492491606, now seen corresponding path program 32 times [2021-11-07 07:43:46,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:46,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545254028] [2021-11-07 07:43:46,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:46,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:48,252 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 25 proven. 379 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:48,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:48,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545254028] [2021-11-07 07:43:48,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545254028] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:48,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127916174] [2021-11-07 07:43:48,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:43:48,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:48,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:48,254 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:48,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-07 07:43:50,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:43:50,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:43:50,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-07 07:43:50,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:50,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:43:50,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:43:50,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:43:50,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:43:50,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:43:50,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-07 07:43:50,816 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-07 07:43:50,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 37 [2021-11-07 07:43:50,927 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-07 07:43:50,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 37 [2021-11-07 07:43:51,037 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-07 07:43:51,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 37 [2021-11-07 07:43:51,150 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-07 07:43:51,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 37 [2021-11-07 07:43:51,261 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-07 07:43:51,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 37 [2021-11-07 07:43:51,372 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-07 07:43:51,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-11-07 07:43:51,528 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-07 07:43:51,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:43:51,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2021-11-07 07:43:51,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170297915] [2021-11-07 07:43:51,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-07 07:43:51,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:51,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-07 07:43:51,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=2044, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 07:43:51,530 INFO L87 Difference]: Start difference. First operand 652 states and 794 transitions. Second operand has 40 states, 40 states have (on average 2.3) internal successors, (92), 40 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:58,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:58,003 INFO L93 Difference]: Finished difference Result 1335 states and 1498 transitions. [2021-11-07 07:43:58,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-11-07 07:43:58,004 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.3) internal successors, (92), 40 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-07 07:43:58,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:58,009 INFO L225 Difference]: With dead ends: 1335 [2021-11-07 07:43:58,010 INFO L226 Difference]: Without dead ends: 1259 [2021-11-07 07:43:58,011 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5795 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1880, Invalid=17580, Unknown=0, NotChecked=0, Total=19460 [2021-11-07 07:43:58,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2021-11-07 07:43:58,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 671. [2021-11-07 07:43:58,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 1.2223880597014924) internal successors, (819), 670 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:58,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 819 transitions. [2021-11-07 07:43:58,519 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 819 transitions. Word has length 92 [2021-11-07 07:43:58,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:58,520 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 819 transitions. [2021-11-07 07:43:58,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.3) internal successors, (92), 40 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:58,520 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 819 transitions. [2021-11-07 07:43:58,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 07:43:58,522 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:58,522 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:58,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-07 07:43:58,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-07 07:43:58,738 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:58,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:58,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1615318788, now seen corresponding path program 33 times [2021-11-07 07:43:58,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:58,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420868420] [2021-11-07 07:43:58,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:58,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:58,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:00,073 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:00,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:00,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420868420] [2021-11-07 07:44:00,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420868420] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:00,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435045802] [2021-11-07 07:44:00,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:44:00,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:00,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:00,075 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:00,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-07 07:44:02,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-07 07:44:02,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:02,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-07 07:44:02,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:02,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-07 07:44:02,761 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-07 07:44:02,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-07 07:44:04,355 INFO L354 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2021-11-07 07:44:04,355 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 96 treesize of output 65 [2021-11-07 07:44:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 120 proven. 153 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-07 07:44:04,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435045802] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:04,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:04,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 27] total 64 [2021-11-07 07:44:04,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297182807] [2021-11-07 07:44:04,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-07 07:44:04,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:04,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-07 07:44:04,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=3663, Unknown=0, NotChecked=0, Total=4032 [2021-11-07 07:44:04,495 INFO L87 Difference]: Start difference. First operand 671 states and 819 transitions. Second operand has 64 states, 64 states have (on average 2.578125) internal successors, (165), 64 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) [2021-11-07 07:44:16,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:16,120 INFO L93 Difference]: Finished difference Result 1202 states and 1393 transitions. [2021-11-07 07:44:16,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-11-07 07:44:16,120 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.578125) internal successors, (165), 64 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 94 [2021-11-07 07:44:16,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:16,125 INFO L225 Difference]: With dead ends: 1202 [2021-11-07 07:44:16,126 INFO L226 Difference]: Without dead ends: 1122 [2021-11-07 07:44:16,128 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13777 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=3623, Invalid=41533, Unknown=0, NotChecked=0, Total=45156 [2021-11-07 07:44:16,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-11-07 07:44:16,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 502. [2021-11-07 07:44:16,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 1.2075848303393213) internal successors, (605), 501 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:16,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 605 transitions. [2021-11-07 07:44:16,496 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 605 transitions. Word has length 94 [2021-11-07 07:44:16,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:16,496 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 605 transitions. [2021-11-07 07:44:16,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.578125) internal successors, (165), 64 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) [2021-11-07 07:44:16,496 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 605 transitions. [2021-11-07 07:44:16,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 07:44:16,497 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:16,497 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:16,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:16,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-11-07 07:44:16,698 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:16,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:16,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1337717436, now seen corresponding path program 34 times [2021-11-07 07:44:16,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:16,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070646387] [2021-11-07 07:44:16,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:16,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:16,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 4 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:17,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:17,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070646387] [2021-11-07 07:44:17,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070646387] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:17,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551332809] [2021-11-07 07:44:17,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:44:17,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:17,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:17,918 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:17,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-07 07:44:19,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:44:19,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:19,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-07 07:44:19,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:19,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:44:19,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:44:20,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:44:20,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:44:20,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:44:20,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:44:20,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-07 07:44:20,300 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-07 07:44:20,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 37 [2021-11-07 07:44:20,411 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-07 07:44:20,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 37 [2021-11-07 07:44:20,527 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-07 07:44:20,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-11-07 07:44:20,677 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-07 07:44:20,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:44:20,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2021-11-07 07:44:20,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929731506] [2021-11-07 07:44:20,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-07 07:44:20,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:20,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-07 07:44:20,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1834, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 07:44:20,679 INFO L87 Difference]: Start difference. First operand 502 states and 605 transitions. Second operand has 40 states, 40 states have (on average 2.375) internal successors, (95), 40 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) [2021-11-07 07:44:26,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:26,263 INFO L93 Difference]: Finished difference Result 613 states and 711 transitions. [2021-11-07 07:44:26,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-11-07 07:44:26,264 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 40 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 95 [2021-11-07 07:44:26,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:26,268 INFO L225 Difference]: With dead ends: 613 [2021-11-07 07:44:26,268 INFO L226 Difference]: Without dead ends: 611 [2021-11-07 07:44:26,270 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4290 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1320, Invalid=14430, Unknown=0, NotChecked=0, Total=15750 [2021-11-07 07:44:26,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-11-07 07:44:26,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 452. [2021-11-07 07:44:26,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 1.212860310421286) internal successors, (547), 451 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:26,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 547 transitions. [2021-11-07 07:44:26,732 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 547 transitions. Word has length 95 [2021-11-07 07:44:26,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:26,732 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 547 transitions. [2021-11-07 07:44:26,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 40 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) [2021-11-07 07:44:26,733 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 547 transitions. [2021-11-07 07:44:26,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 07:44:26,734 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:26,734 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:26,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:26,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:26,962 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:26,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:26,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1902648038, now seen corresponding path program 35 times [2021-11-07 07:44:26,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:26,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477852100] [2021-11-07 07:44:26,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:26,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:27,345 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 213 proven. 178 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-07 07:44:27,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:27,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477852100] [2021-11-07 07:44:27,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477852100] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:27,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129071131] [2021-11-07 07:44:27,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:44:27,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:27,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:27,347 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:27,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-07 07:44:29,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-11-07 07:44:29,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:29,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 07:44:29,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 247 proven. 144 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-07 07:44:30,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129071131] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:30,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:30,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 43 [2021-11-07 07:44:30,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435042765] [2021-11-07 07:44:30,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-07 07:44:30,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:30,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-07 07:44:30,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1381, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 07:44:30,373 INFO L87 Difference]: Start difference. First operand 452 states and 547 transitions. Second operand has 43 states, 43 states have (on average 2.7674418604651163) internal successors, (119), 43 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:32,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:32,206 INFO L93 Difference]: Finished difference Result 884 states and 1061 transitions. [2021-11-07 07:44:32,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-07 07:44:32,207 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.7674418604651163) internal successors, (119), 43 states have internal predecessors, (119), 0 states have call successors, (0), 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 95 [2021-11-07 07:44:32,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:32,210 INFO L225 Difference]: With dead ends: 884 [2021-11-07 07:44:32,210 INFO L226 Difference]: Without dead ends: 742 [2021-11-07 07:44:32,211 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1349, Invalid=5131, Unknown=0, NotChecked=0, Total=6480 [2021-11-07 07:44:32,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-11-07 07:44:32,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 626. [2021-11-07 07:44:32,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 1.2224) internal successors, (764), 625 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:32,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 764 transitions. [2021-11-07 07:44:32,671 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 764 transitions. Word has length 95 [2021-11-07 07:44:32,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:32,672 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 764 transitions. [2021-11-07 07:44:32,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.7674418604651163) internal successors, (119), 43 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:32,672 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 764 transitions. [2021-11-07 07:44:32,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 07:44:32,673 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:32,673 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:32,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:32,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:32,874 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:32,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:32,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1787901916, now seen corresponding path program 36 times [2021-11-07 07:44:32,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:32,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7367210] [2021-11-07 07:44:32,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:32,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:35,198 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 36 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:35,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:35,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7367210] [2021-11-07 07:44:35,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7367210] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:35,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055027948] [2021-11-07 07:44:35,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:44:35,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:35,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:35,200 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:35,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-07 07:44:37,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-11-07 07:44:37,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:37,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-07 07:44:37,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:38,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-07 07:44:38,280 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-07 07:44:38,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 24 [2021-11-07 07:44:38,303 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-07 07:44:38,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 24 [2021-11-07 07:44:38,326 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-07 07:44:38,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 24 [2021-11-07 07:44:38,349 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-07 07:44:38,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 24 [2021-11-07 07:44:38,372 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-07 07:44:38,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 24 [2021-11-07 07:44:38,395 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-07 07:44:38,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 24 [2021-11-07 07:44:38,419 INFO L354 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2021-11-07 07:44:38,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2021-11-07 07:44:38,537 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-07 07:44:38,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:44:38,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2021-11-07 07:44:38,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084573206] [2021-11-07 07:44:38,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-07 07:44:38,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:38,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-07 07:44:38,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=2274, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 07:44:38,539 INFO L87 Difference]: Start difference. First operand 626 states and 764 transitions. Second operand has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:46,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:46,088 INFO L93 Difference]: Finished difference Result 1005 states and 1152 transitions. [2021-11-07 07:44:46,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-11-07 07:44:46,088 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-07 07:44:46,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:46,092 INFO L225 Difference]: With dead ends: 1005 [2021-11-07 07:44:46,092 INFO L226 Difference]: Without dead ends: 925 [2021-11-07 07:44:46,094 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5968 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2102, Invalid=20248, Unknown=0, NotChecked=0, Total=22350 [2021-11-07 07:44:46,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-11-07 07:44:46,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 629. [2021-11-07 07:44:46,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 1.2197452229299364) internal successors, (766), 628 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:46,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 766 transitions. [2021-11-07 07:44:46,588 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 766 transitions. Word has length 97 [2021-11-07 07:44:46,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:46,589 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 766 transitions. [2021-11-07 07:44:46,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:46,589 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 766 transitions. [2021-11-07 07:44:46,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 07:44:46,590 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:46,590 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:46,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-11-07 07:44:46,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-11-07 07:44:46,791 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:46,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:46,791 INFO L85 PathProgramCache]: Analyzing trace with hash -194350928, now seen corresponding path program 9 times [2021-11-07 07:44:46,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:46,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60805821] [2021-11-07 07:44:46,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:46,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:47,981 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:47,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:47,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60805821] [2021-11-07 07:44:47,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60805821] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:47,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913708609] [2021-11-07 07:44:47,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:44:47,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:47,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:47,984 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:47,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-07 07:44:50,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-07 07:44:50,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:50,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-07 07:44:50,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:50,422 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 [2021-11-07 07:44:50,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:44:50,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:44:50,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:44:50,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:44:50,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:44:50,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:44:50,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:44:50,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:44:50,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:44:50,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-07 07:44:52,711 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-11-07 07:44:52,711 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 53 treesize of output 42 [2021-11-07 07:44:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 19 proven. 307 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-07 07:44:52,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913708609] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:52,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:52,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 29] total 56 [2021-11-07 07:44:52,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377789622] [2021-11-07 07:44:52,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-07 07:44:52,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:52,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-07 07:44:52,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=2785, Unknown=0, NotChecked=0, Total=3080 [2021-11-07 07:44:52,767 INFO L87 Difference]: Start difference. First operand 629 states and 766 transitions. Second operand has 56 states, 56 states have (on average 3.125) internal successors, (175), 56 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:58,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:58,787 INFO L93 Difference]: Finished difference Result 1024 states and 1201 transitions. [2021-11-07 07:44:58,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-07 07:44:58,788 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.125) internal successors, (175), 56 states have internal predecessors, (175), 0 states have call successors, (0), 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 [2021-11-07 07:44:58,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:58,792 INFO L225 Difference]: With dead ends: 1024 [2021-11-07 07:44:58,792 INFO L226 Difference]: Without dead ends: 969 [2021-11-07 07:44:58,794 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5929 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2258, Invalid=19204, Unknown=0, NotChecked=0, Total=21462 [2021-11-07 07:44:58,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-11-07 07:44:59,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 803. [2021-11-07 07:44:59,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 1.2057356608478802) internal successors, (967), 802 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:59,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 967 transitions. [2021-11-07 07:44:59,445 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 967 transitions. Word has length 98 [2021-11-07 07:44:59,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:59,446 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 967 transitions. [2021-11-07 07:44:59,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.125) internal successors, (175), 56 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:59,446 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 967 transitions. [2021-11-07 07:44:59,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 07:44:59,447 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:59,448 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:59,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:59,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-11-07 07:44:59,649 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:59,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:59,650 INFO L85 PathProgramCache]: Analyzing trace with hash -2087172108, now seen corresponding path program 37 times [2021-11-07 07:44:59,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:59,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220775897] [2021-11-07 07:44:59,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:59,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:00,788 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:00,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:00,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220775897] [2021-11-07 07:45:00,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220775897] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:00,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274923233] [2021-11-07 07:45:00,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:45:00,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:00,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:00,790 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:00,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-07 07:45:03,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:03,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-07 07:45:03,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:03,441 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 [2021-11-07 07:45:04,135 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-07 07:45:04,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274923233] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:04,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:04,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 24] total 48 [2021-11-07 07:45:04,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971132808] [2021-11-07 07:45:04,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-07 07:45:04,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:04,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-07 07:45:04,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2048, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 07:45:04,138 INFO L87 Difference]: Start difference. First operand 803 states and 967 transitions. Second operand has 48 states, 48 states have (on average 3.5208333333333335) internal successors, (169), 48 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:08,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:08,994 INFO L93 Difference]: Finished difference Result 1289 states and 1483 transitions. [2021-11-07 07:45:08,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-11-07 07:45:08,994 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.5208333333333335) internal successors, (169), 48 states have internal predecessors, (169), 0 states have call successors, (0), 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 [2021-11-07 07:45:08,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:09,000 INFO L225 Difference]: With dead ends: 1289 [2021-11-07 07:45:09,000 INFO L226 Difference]: Without dead ends: 1210 [2021-11-07 07:45:09,001 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3196 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1198, Invalid=11458, Unknown=0, NotChecked=0, Total=12656 [2021-11-07 07:45:09,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-11-07 07:45:09,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 787. [2021-11-07 07:45:09,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 1.2213740458015268) internal successors, (960), 786 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:09,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 960 transitions. [2021-11-07 07:45:09,650 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 960 transitions. Word has length 98 [2021-11-07 07:45:09,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:09,650 INFO L470 AbstractCegarLoop]: Abstraction has 787 states and 960 transitions. [2021-11-07 07:45:09,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.5208333333333335) internal successors, (169), 48 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:09,651 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 960 transitions. [2021-11-07 07:45:09,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 07:45:09,652 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:09,652 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:09,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:09,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-07 07:45:09,853 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:09,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:09,853 INFO L85 PathProgramCache]: Analyzing trace with hash 40194754, now seen corresponding path program 38 times [2021-11-07 07:45:09,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:09,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984019261] [2021-11-07 07:45:09,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:09,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:11,537 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 9 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:11,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:11,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984019261] [2021-11-07 07:45:11,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984019261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:11,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357784042] [2021-11-07 07:45:11,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:45:11,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:11,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:11,539 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:11,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-07 07:45:13,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:45:13,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:13,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-07 07:45:13,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:13,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:45:13,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:45:13,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:45:14,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:45:14,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:45:14,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:45:14,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:45:14,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-07 07:45:14,306 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-07 07:45:14,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 37 [2021-11-07 07:45:14,418 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-07 07:45:14,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 37 [2021-11-07 07:45:14,532 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-07 07:45:14,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 37 [2021-11-07 07:45:14,704 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-07 07:45:14,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-11-07 07:45:14,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-07 07:45:14,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:45:14,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2021-11-07 07:45:14,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061329699] [2021-11-07 07:45:14,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-07 07:45:14,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:14,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-07 07:45:14,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=2081, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 07:45:14,887 INFO L87 Difference]: Start difference. First operand 787 states and 960 transitions. Second operand has 42 states, 42 states have (on average 2.380952380952381) internal successors, (100), 42 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:21,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:21,372 INFO L93 Difference]: Finished difference Result 1036 states and 1205 transitions. [2021-11-07 07:45:21,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-11-07 07:45:21,372 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.380952380952381) internal successors, (100), 42 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-07 07:45:21,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:21,377 INFO L225 Difference]: With dead ends: 1036 [2021-11-07 07:45:21,377 INFO L226 Difference]: Without dead ends: 1034 [2021-11-07 07:45:21,378 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5238 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1553, Invalid=17079, Unknown=0, NotChecked=0, Total=18632 [2021-11-07 07:45:21,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-11-07 07:45:21,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 691. [2021-11-07 07:45:21,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 690 states have (on average 1.228985507246377) internal successors, (848), 690 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:21,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 848 transitions. [2021-11-07 07:45:21,897 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 848 transitions. Word has length 100 [2021-11-07 07:45:21,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:21,897 INFO L470 AbstractCegarLoop]: Abstraction has 691 states and 848 transitions. [2021-11-07 07:45:21,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.380952380952381) internal successors, (100), 42 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:21,898 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 848 transitions. [2021-11-07 07:45:21,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 07:45:21,899 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:21,899 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:21,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:22,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-07 07:45:22,100 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:22,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:22,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1722092332, now seen corresponding path program 39 times [2021-11-07 07:45:22,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:22,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023225814] [2021-11-07 07:45:22,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:22,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:22,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:22,666 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 250 proven. 206 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-07 07:45:22,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:22,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023225814] [2021-11-07 07:45:22,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023225814] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:22,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136663042] [2021-11-07 07:45:22,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:45:22,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:22,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:22,669 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:22,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbcf856-f952-44df-96c0-0e1d52bbf358/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-07 07:45:25,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-11-07 07:45:25,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:25,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-07 07:45:25,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:26,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-07 07:45:26,301 INFO L354 Elim1Store]: treesize reduction 57, result has 17.4 percent of original size [2021-11-07 07:45:26,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 27 [2021-11-07 07:45:26,383 INFO L354 Elim1Store]: treesize reduction 57, result has 17.4 percent of original size [2021-11-07 07:45:26,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 27 [2021-11-07 07:45:26,466 INFO L354 Elim1Store]: treesize reduction 57, result has 17.4 percent of original size [2021-11-07 07:45:26,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 27 [2021-11-07 07:45:26,549 INFO L354 Elim1Store]: treesize reduction 57, result has 17.4 percent of original size [2021-11-07 07:45:26,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 27 [2021-11-07 07:45:26,632 INFO L354 Elim1Store]: treesize reduction 57, result has 17.4 percent of original size [2021-11-07 07:45:26,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 27 [2021-11-07 07:45:26,719 INFO L354 Elim1Store]: treesize reduction 57, result has 17.4 percent of original size [2021-11-07 07:45:26,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 27 [2021-11-07 07:45:26,863 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-07 07:45:26,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-07 07:45:28,169 INFO L354 Elim1Store]: treesize reduction 44, result has 6.4 percent of original size [2021-11-07 07:45:28,169 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 110 treesize of output 42 [2021-11-07 07:45:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 152 proven. 303 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-07 07:45:28,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136663042] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:28,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:28,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 38] total 66 [2021-11-07 07:45:28,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981387875] [2021-11-07 07:45:28,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-07 07:45:28,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:28,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-07 07:45:28,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=568, Invalid=3722, Unknown=0, NotChecked=0, Total=4290 [2021-11-07 07:45:28,222 INFO L87 Difference]: Start difference. First operand 691 states and 848 transitions. Second operand has 66 states, 66 states have (on average 2.4393939393939394) internal successors, (161), 66 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)