./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/add-2-n-u.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_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/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_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-multidimensional/add-2-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/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_4b48a607-522d-46e1-bfab-22c7e7f905a3/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 7202e877c1332442c2c226005d8bd7e5f4094e339ca214931497ee0f3766da6a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:31:20,275 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:31:20,279 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:31:20,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:31:20,345 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:31:20,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:31:20,349 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:31:20,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:31:20,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:31:20,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:31:20,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:31:20,360 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:31:20,360 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:31:20,362 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:31:20,364 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:31:20,366 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:31:20,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:31:20,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:31:20,373 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:31:20,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:31:20,379 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:31:20,381 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:31:20,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:31:20,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:31:20,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:31:20,390 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:31:20,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:31:20,392 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:31:20,393 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:31:20,394 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:31:20,395 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:31:20,396 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:31:20,397 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:31:20,399 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:31:20,401 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:31:20,401 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:31:20,402 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:31:20,410 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:31:20,410 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:31:20,412 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:31:20,413 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:31:20,415 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:31:20,459 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:31:20,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:31:20,464 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:31:20,464 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:31:20,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:31:20,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:31:20,475 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:31:20,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:31:20,476 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:31:20,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:31:20,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:31:20,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:31:20,476 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:31:20,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:31:20,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:31:20,477 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:31:20,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:31:20,477 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:31:20,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:31:20,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:31:20,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:31:20,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:31:20,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:31:20,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:31:20,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:31:20,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:31:20,480 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:31:20,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:31:20,480 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:31:20,481 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:31:20,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:31:20,481 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:31:20,481 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_4b48a607-522d-46e1-bfab-22c7e7f905a3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7202e877c1332442c2c226005d8bd7e5f4094e339ca214931497ee0f3766da6a [2021-11-07 08:31:20,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:31:20,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:31:20,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:31:20,804 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:31:20,805 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:31:20,806 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/array-multidimensional/add-2-n-u.c [2021-11-07 08:31:20,930 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/data/db7c1116f/815038be79184527a187f30cbeb020b6/FLAG9e6c8626c [2021-11-07 08:31:21,487 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:31:21,488 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/sv-benchmarks/c/array-multidimensional/add-2-n-u.c [2021-11-07 08:31:21,495 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/data/db7c1116f/815038be79184527a187f30cbeb020b6/FLAG9e6c8626c [2021-11-07 08:31:21,835 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/data/db7c1116f/815038be79184527a187f30cbeb020b6 [2021-11-07 08:31:21,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:31:21,841 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:31:21,851 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:31:21,851 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:31:21,855 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:31:21,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:31:21" (1/1) ... [2021-11-07 08:31:21,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e170523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:21, skipping insertion in model container [2021-11-07 08:31:21,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:31:21" (1/1) ... [2021-11-07 08:31:21,866 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:31:21,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:31:22,063 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_4b48a607-522d-46e1-bfab-22c7e7f905a3/sv-benchmarks/c/array-multidimensional/add-2-n-u.c[321,334] [2021-11-07 08:31:22,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:31:22,089 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:31:22,100 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_4b48a607-522d-46e1-bfab-22c7e7f905a3/sv-benchmarks/c/array-multidimensional/add-2-n-u.c[321,334] [2021-11-07 08:31:22,111 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:31:22,124 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:31:22,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:22 WrapperNode [2021-11-07 08:31:22,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:31:22,126 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:31:22,126 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:31:22,126 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:31:22,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:22" (1/1) ... [2021-11-07 08:31:22,140 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:22" (1/1) ... [2021-11-07 08:31:22,160 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:31:22,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:31:22,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:31:22,162 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:31:22,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:22" (1/1) ... [2021-11-07 08:31:22,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:22" (1/1) ... [2021-11-07 08:31:22,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:22" (1/1) ... [2021-11-07 08:31:22,172 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:22" (1/1) ... [2021-11-07 08:31:22,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:22" (1/1) ... [2021-11-07 08:31:22,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:22" (1/1) ... [2021-11-07 08:31:22,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:22" (1/1) ... [2021-11-07 08:31:22,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:31:22,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:31:22,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:31:22,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:31:22,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:22" (1/1) ... [2021-11-07 08:31:22,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:31:22,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:31:22,223 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:31:22,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:31:22,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:31:22,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:31:22,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 08:31:22,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:31:22,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:31:22,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 08:31:22,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 08:31:22,626 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:31:22,627 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-11-07 08:31:22,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:31:22 BoogieIcfgContainer [2021-11-07 08:31:22,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:31:22,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:31:22,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:31:22,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:31:22,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:31:21" (1/3) ... [2021-11-07 08:31:22,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e6408e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:31:22, skipping insertion in model container [2021-11-07 08:31:22,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:22" (2/3) ... [2021-11-07 08:31:22,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e6408e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:31:22, skipping insertion in model container [2021-11-07 08:31:22,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:31:22" (3/3) ... [2021-11-07 08:31:22,644 INFO L111 eAbstractionObserver]: Analyzing ICFG add-2-n-u.c [2021-11-07 08:31:22,649 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:31:22,649 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:31:22,695 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:31:22,703 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 08:31:22,703 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:31:22,718 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 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 08:31:22,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 08:31:22,724 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:22,724 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:22,725 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:22,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:22,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1817636276, now seen corresponding path program 1 times [2021-11-07 08:31:22,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:22,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630445419] [2021-11-07 08:31:22,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:22,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:22,827 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:31:22,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341691788] [2021-11-07 08:31:22,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:22,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:22,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:31:22,846 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:31:22,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:31:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:22,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:31:22,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:31:23,055 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 08:31:23,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:23,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630445419] [2021-11-07 08:31:23,057 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:31:23,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341691788] [2021-11-07 08:31:23,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341691788] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:31:23,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:31:23,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:31:23,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250574756] [2021-11-07 08:31:23,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:31:23,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:23,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:31:23,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:31:23,082 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 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) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states 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 08:31:23,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:23,132 INFO L93 Difference]: Finished difference Result 43 states and 71 transitions. [2021-11-07 08:31:23,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:31:23,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-11-07 08:31:23,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:23,158 INFO L225 Difference]: With dead ends: 43 [2021-11-07 08:31:23,158 INFO L226 Difference]: Without dead ends: 20 [2021-11-07 08:31:23,161 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:31:23,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-07 08:31:23,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-11-07 08:31:23,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 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 08:31:23,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2021-11-07 08:31:23,225 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 10 [2021-11-07 08:31:23,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:23,226 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2021-11-07 08:31:23,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states 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 08:31:23,227 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2021-11-07 08:31:23,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 08:31:23,228 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:23,228 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:23,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:31:23,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-07 08:31:23,429 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:23,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:23,430 INFO L85 PathProgramCache]: Analyzing trace with hash 429030367, now seen corresponding path program 1 times [2021-11-07 08:31:23,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:23,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283779981] [2021-11-07 08:31:23,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:23,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:23,446 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:31:23,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347675300] [2021-11-07 08:31:23,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:23,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:23,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:31:23,448 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:31:23,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:31:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:23,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:31:23,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:31:23,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:23,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:23,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283779981] [2021-11-07 08:31:23,629 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:31:23,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347675300] [2021-11-07 08:31:23,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347675300] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:31:23,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:31:23,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:31:23,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371310538] [2021-11-07 08:31:23,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:31:23,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:23,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:31:23,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:31:23,635 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:23,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:23,690 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2021-11-07 08:31:23,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:31:23,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-07 08:31:23,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:23,692 INFO L225 Difference]: With dead ends: 43 [2021-11-07 08:31:23,693 INFO L226 Difference]: Without dead ends: 28 [2021-11-07 08:31:23,694 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 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 08:31:23,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-07 08:31:23,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2021-11-07 08:31:23,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:23,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-11-07 08:31:23,702 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 13 [2021-11-07 08:31:23,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:23,703 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-11-07 08:31:23,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:23,703 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-11-07 08:31:23,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 08:31:23,704 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:23,705 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:23,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:31:23,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:23,918 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:23,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:23,919 INFO L85 PathProgramCache]: Analyzing trace with hash -270581085, now seen corresponding path program 1 times [2021-11-07 08:31:23,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:23,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582974540] [2021-11-07 08:31:23,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:23,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:23,934 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:31:23,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533604780] [2021-11-07 08:31:23,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:23,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:23,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:31:23,939 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:31:23,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:31:24,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:24,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:31:24,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:31:24,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:24,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:24,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582974540] [2021-11-07 08:31:24,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:31:24,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533604780] [2021-11-07 08:31:24,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533604780] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:31:24,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:31:24,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-07 08:31:24,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091500459] [2021-11-07 08:31:24,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:31:24,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:24,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:31:24,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:31:24,151 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:24,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:24,254 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2021-11-07 08:31:24,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:31:24,255 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-07 08:31:24,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:24,259 INFO L225 Difference]: With dead ends: 53 [2021-11-07 08:31:24,259 INFO L226 Difference]: Without dead ends: 35 [2021-11-07 08:31:24,260 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:31:24,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-07 08:31:24,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2021-11-07 08:31:24,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:24,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-11-07 08:31:24,274 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2021-11-07 08:31:24,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:24,274 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-11-07 08:31:24,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:24,274 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-11-07 08:31:24,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 08:31:24,275 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:24,275 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:24,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:31:24,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:24,477 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:24,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:24,478 INFO L85 PathProgramCache]: Analyzing trace with hash -483699617, now seen corresponding path program 2 times [2021-11-07 08:31:24,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:24,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016375421] [2021-11-07 08:31:24,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:24,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:24,490 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:31:24,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85298832] [2021-11-07 08:31:24,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:31:24,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:24,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:31:24,492 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:31:24,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:31:24,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 08:31:24,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:31:24,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:31:24,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:31:24,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:31:24,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:24,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016375421] [2021-11-07 08:31:24,667 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:31:24,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85298832] [2021-11-07 08:31:24,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85298832] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:31:24,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:31:24,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:31:24,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680907385] [2021-11-07 08:31:24,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:31:24,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:24,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:31:24,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:31:24,671 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:24,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:24,754 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2021-11-07 08:31:24,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:31:24,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-07 08:31:24,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:24,759 INFO L225 Difference]: With dead ends: 58 [2021-11-07 08:31:24,760 INFO L226 Difference]: Without dead ends: 46 [2021-11-07 08:31:24,761 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 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 08:31:24,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-07 08:31:24,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 27. [2021-11-07 08:31:24,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 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 08:31:24,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-11-07 08:31:24,778 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 15 [2021-11-07 08:31:24,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:24,779 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-11-07 08:31:24,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:24,779 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-11-07 08:31:24,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 08:31:24,781 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:24,781 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 08:31:24,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:31:24,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:24,990 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:24,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:24,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1009156328, now seen corresponding path program 1 times [2021-11-07 08:31:24,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:24,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196326255] [2021-11-07 08:31:24,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:24,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:25,015 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:31:25,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [22570870] [2021-11-07 08:31:25,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:25,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:25,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:31:25,021 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:31:25,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:31:25,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:25,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 08:31:25,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:31:25,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:31:25,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:25,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196326255] [2021-11-07 08:31:25,251 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:31:25,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22570870] [2021-11-07 08:31:25,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22570870] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:31:25,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:31:25,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-07 08:31:25,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058103447] [2021-11-07 08:31:25,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:31:25,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:25,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:31:25,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:31:25,256 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:25,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:25,344 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2021-11-07 08:31:25,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:31:25,345 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-07 08:31:25,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:25,346 INFO L225 Difference]: With dead ends: 65 [2021-11-07 08:31:25,346 INFO L226 Difference]: Without dead ends: 41 [2021-11-07 08:31:25,347 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:31:25,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-07 08:31:25,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2021-11-07 08:31:25,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:25,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-11-07 08:31:25,361 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 20 [2021-11-07 08:31:25,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:25,362 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-11-07 08:31:25,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:25,362 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-11-07 08:31:25,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 08:31:25,364 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:25,364 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:25,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:31:25,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:25,590 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:25,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:25,591 INFO L85 PathProgramCache]: Analyzing trace with hash 923115154, now seen corresponding path program 2 times [2021-11-07 08:31:25,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:25,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938079863] [2021-11-07 08:31:25,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:25,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:25,602 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:31:25,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920123127] [2021-11-07 08:31:25,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:31:25,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:25,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:31:25,618 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:31:25,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 08:31:25,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:31:25,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:31:25,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:31:25,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:31:25,847 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 08:31:25,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:25,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938079863] [2021-11-07 08:31:25,847 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:31:25,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920123127] [2021-11-07 08:31:25,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920123127] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:31:25,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:31:25,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-07 08:31:25,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706784728] [2021-11-07 08:31:25,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:31:25,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:25,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:31:25,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:31:25,850 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:25,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:25,918 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2021-11-07 08:31:25,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:31:25,919 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-07 08:31:25,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:25,920 INFO L225 Difference]: With dead ends: 77 [2021-11-07 08:31:25,920 INFO L226 Difference]: Without dead ends: 48 [2021-11-07 08:31:25,921 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:31:25,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-07 08:31:25,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2021-11-07 08:31:25,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:25,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2021-11-07 08:31:25,928 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 22 [2021-11-07 08:31:25,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:25,928 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2021-11-07 08:31:25,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:25,929 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2021-11-07 08:31:25,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 08:31:25,930 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:25,930 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:25,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 08:31:26,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:26,154 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:26,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:26,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1541106392, now seen corresponding path program 3 times [2021-11-07 08:31:26,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:26,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729468737] [2021-11-07 08:31:26,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:26,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:26,167 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:31:26,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605109812] [2021-11-07 08:31:26,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:31:26,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:26,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:31:26,169 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:31:26,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 08:31:26,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 08:31:26,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:31:26,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:31:26,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:31:26,389 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 08:31:26,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:26,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729468737] [2021-11-07 08:31:26,390 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:31:26,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605109812] [2021-11-07 08:31:26,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605109812] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:31:26,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:31:26,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-07 08:31:26,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327735715] [2021-11-07 08:31:26,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:31:26,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:26,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:31:26,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:31:26,392 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:26,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:26,458 INFO L93 Difference]: Finished difference Result 124 states and 152 transitions. [2021-11-07 08:31:26,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:31:26,458 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 08:31:26,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:26,461 INFO L225 Difference]: With dead ends: 124 [2021-11-07 08:31:26,461 INFO L226 Difference]: Without dead ends: 97 [2021-11-07 08:31:26,463 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:31:26,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-07 08:31:26,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 51. [2021-11-07 08:31:26,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:26,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2021-11-07 08:31:26,478 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 24 [2021-11-07 08:31:26,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:26,479 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2021-11-07 08:31:26,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:26,479 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2021-11-07 08:31:26,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 08:31:26,480 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:26,481 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:26,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 08:31:26,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:26,706 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:26,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:26,707 INFO L85 PathProgramCache]: Analyzing trace with hash -57445772, now seen corresponding path program 4 times [2021-11-07 08:31:26,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:26,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723255941] [2021-11-07 08:31:26,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:26,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:26,717 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:31:26,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [165853145] [2021-11-07 08:31:26,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:31:26,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:26,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:31:26,719 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:31:26,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 08:31:28,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:31:28,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:31:28,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 08:31:28,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:31:28,570 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-07 08:31:28,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:28,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723255941] [2021-11-07 08:31:28,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:31:28,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165853145] [2021-11-07 08:31:28,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165853145] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:31:28,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:31:28,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-07 08:31:28,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663419803] [2021-11-07 08:31:28,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:31:28,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:28,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:31:28,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:31:28,576 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:28,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:28,656 INFO L93 Difference]: Finished difference Result 114 states and 135 transitions. [2021-11-07 08:31:28,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:31:28,657 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-07 08:31:28,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:28,659 INFO L225 Difference]: With dead ends: 114 [2021-11-07 08:31:28,659 INFO L226 Difference]: Without dead ends: 71 [2021-11-07 08:31:28,660 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:31:28,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-07 08:31:28,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2021-11-07 08:31:28,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 57 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:28,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2021-11-07 08:31:28,684 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 38 [2021-11-07 08:31:28,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:28,685 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2021-11-07 08:31:28,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:28,685 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2021-11-07 08:31:28,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 08:31:28,688 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:28,688 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:28,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 08:31:28,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:28,889 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:28,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:28,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1601697520, now seen corresponding path program 5 times [2021-11-07 08:31:28,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:28,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407195392] [2021-11-07 08:31:28,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:28,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:28,896 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:31:28,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241501957] [2021-11-07 08:31:28,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:31:28,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:28,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:31:28,901 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:31:28,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 08:44:22,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-07 08:44:22,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:44:22,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:44:22,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:44:22,871 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 38 proven. 15 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-07 08:44:22,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:44:22,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407195392] [2021-11-07 08:44:22,872 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:44:22,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241501957] [2021-11-07 08:44:22,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241501957] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:44:22,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:44:22,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-07 08:44:22,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336033104] [2021-11-07 08:44:22,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:44:22,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:44:22,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:44:22,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:44:22,879 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:22,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:44:22,976 INFO L93 Difference]: Finished difference Result 129 states and 151 transitions. [2021-11-07 08:44:22,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:44:22,977 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-07 08:44:22,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:44:22,978 INFO L225 Difference]: With dead ends: 129 [2021-11-07 08:44:22,978 INFO L226 Difference]: Without dead ends: 80 [2021-11-07 08:44:22,979 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:44:22,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-07 08:44:22,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 65. [2021-11-07 08:44:22,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.203125) internal successors, (77), 64 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 08:44:22,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2021-11-07 08:44:23,002 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 42 [2021-11-07 08:44:23,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:44:23,004 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2021-11-07 08:44:23,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:23,004 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2021-11-07 08:44:23,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 08:44:23,006 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:44:23,006 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:44:23,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 08:44:23,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:44:23,207 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:44:23,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:44:23,208 INFO L85 PathProgramCache]: Analyzing trace with hash -588516108, now seen corresponding path program 6 times [2021-11-07 08:44:23,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:44:23,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351365149] [2021-11-07 08:44:23,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:44:23,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:44:23,222 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:44:23,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788510986] [2021-11-07 08:44:23,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:44:23,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:44:23,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:44:23,233 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:44:23,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 08:44:23,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-07 08:44:23,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:44:23,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 08:44:23,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:44:23,551 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-11-07 08:44:23,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:44:23,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351365149] [2021-11-07 08:44:23,552 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:44:23,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788510986] [2021-11-07 08:44:23,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788510986] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:44:23,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:44:23,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-07 08:44:23,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225328833] [2021-11-07 08:44:23,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:44:23,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:44:23,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:44:23,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:44:23,555 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:23,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:44:23,595 INFO L93 Difference]: Finished difference Result 126 states and 150 transitions. [2021-11-07 08:44:23,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:44:23,595 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 08:44:23,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:44:23,596 INFO L225 Difference]: With dead ends: 126 [2021-11-07 08:44:23,596 INFO L226 Difference]: Without dead ends: 82 [2021-11-07 08:44:23,599 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:44:23,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-07 08:44:23,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2021-11-07 08:44:23,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.1917808219178083) internal successors, (87), 73 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 08:44:23,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2021-11-07 08:44:23,614 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 46 [2021-11-07 08:44:23,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:44:23,614 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2021-11-07 08:44:23,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:23,615 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2021-11-07 08:44:23,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 08:44:23,616 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:44:23,616 INFO L513 BasicCegarLoop]: trace histogram [18, 12, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:44:23,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 08:44:23,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 08:44:23,842 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:44:23,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:44:23,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1741189919, now seen corresponding path program 7 times [2021-11-07 08:44:23,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:44:23,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326524621] [2021-11-07 08:44:23,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:44:23,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:44:23,877 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:44:23,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1571525319] [2021-11-07 08:44:23,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:44:23,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:44:23,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:44:23,882 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:44:23,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 08:44:24,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:44:24,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 08:44:24,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:44:24,246 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 101 proven. 21 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-11-07 08:44:24,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:44:24,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326524621] [2021-11-07 08:44:24,247 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:44:24,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571525319] [2021-11-07 08:44:24,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571525319] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:44:24,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:44:24,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-07 08:44:24,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243077317] [2021-11-07 08:44:24,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:44:24,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:44:24,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:44:24,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:44:24,250 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:24,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:44:24,336 INFO L93 Difference]: Finished difference Result 163 states and 189 transitions. [2021-11-07 08:44:24,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:44:24,337 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 08:44:24,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:44:24,338 INFO L225 Difference]: With dead ends: 163 [2021-11-07 08:44:24,338 INFO L226 Difference]: Without dead ends: 99 [2021-11-07 08:44:24,338 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:44:24,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-07 08:44:24,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 82. [2021-11-07 08:44:24,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1851851851851851) internal successors, (96), 81 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 08:44:24,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2021-11-07 08:44:24,348 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 55 [2021-11-07 08:44:24,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:44:24,348 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2021-11-07 08:44:24,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:24,349 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2021-11-07 08:44:24,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 08:44:24,350 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:44:24,350 INFO L513 BasicCegarLoop]: trace histogram [21, 14, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:44:24,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 08:44:24,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:44:24,567 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:44:24,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:44:24,567 INFO L85 PathProgramCache]: Analyzing trace with hash -814142497, now seen corresponding path program 8 times [2021-11-07 08:44:24,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:44:24,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042365950] [2021-11-07 08:44:24,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:44:24,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:44:24,577 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:44:24,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771331590] [2021-11-07 08:44:24,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:44:24,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:44:24,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:44:24,580 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:44:24,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 08:44:24,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:44:24,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:44:24,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 08:44:24,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:44:25,032 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 131 proven. 28 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2021-11-07 08:44:25,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:44:25,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042365950] [2021-11-07 08:44:25,032 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:44:25,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771331590] [2021-11-07 08:44:25,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771331590] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:44:25,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:44:25,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-07 08:44:25,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744027130] [2021-11-07 08:44:25,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:44:25,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:44:25,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:44:25,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:44:25,034 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:25,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:44:25,147 INFO L93 Difference]: Finished difference Result 180 states and 207 transitions. [2021-11-07 08:44:25,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 08:44:25,148 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 08:44:25,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:44:25,149 INFO L225 Difference]: With dead ends: 180 [2021-11-07 08:44:25,149 INFO L226 Difference]: Without dead ends: 109 [2021-11-07 08:44:25,150 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:44:25,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-07 08:44:25,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 90. [2021-11-07 08:44:25,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 89 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:25,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 105 transitions. [2021-11-07 08:44:25,159 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 105 transitions. Word has length 60 [2021-11-07 08:44:25,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:44:25,159 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 105 transitions. [2021-11-07 08:44:25,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:44:25,160 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 105 transitions. [2021-11-07 08:44:25,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 08:44:25,161 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:44:25,161 INFO L513 BasicCegarLoop]: trace histogram [24, 16, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:44:25,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 08:44:25,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-07 08:44:25,375 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:44:25,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:44:25,375 INFO L85 PathProgramCache]: Analyzing trace with hash -2100743393, now seen corresponding path program 9 times [2021-11-07 08:44:25,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:44:25,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203302147] [2021-11-07 08:44:25,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:44:25,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:44:25,393 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:44:25,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598682770] [2021-11-07 08:44:25,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:44:25,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:44:25,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:44:25,397 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:44:25,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b48a607-522d-46e1-bfab-22c7e7f905a3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 08:44:35,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-07 08:44:35,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:44:35,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-07 08:44:35,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:44:35,950 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 08:44:35,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-07 08:44:37,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 42 [2021-11-07 08:44:37,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 89 [2021-11-07 08:44:37,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 136 [2021-11-07 08:44:37,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 183 [2021-11-07 08:44:37,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:37,996 INFO L354 Elim1Store]: treesize reduction 415, result has 11.9 percent of original size [2021-11-07 08:44:37,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 12 case distinctions, treesize of input 206 treesize of output 244 [2021-11-07 08:44:38,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,438 INFO L354 Elim1Store]: treesize reduction 815, result has 8.1 percent of original size [2021-11-07 08:44:38,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 17 select indices, 17 select index equivalence classes, 21 disjoint index pairs (out of 136 index pairs), introduced 17 new quantified variables, introduced 27 case distinctions, treesize of input 255 treesize of output 302 [2021-11-07 08:44:38,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:38,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:39,013 INFO L354 Elim1Store]: treesize reduction 1293, result has 6.4 percent of original size [2021-11-07 08:44:39,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 20 select indices, 20 select index equivalence classes, 21 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 45 case distinctions, treesize of input 304 treesize of output 360 [2021-11-07 08:44:39,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:39,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:39,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:39,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:39,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:39,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:39,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:39,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:39,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:39,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:39,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:39,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:39,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:39,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:39,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:39,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:39,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:39,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:39,771 INFO L354 Elim1Store]: treesize reduction 1070, result has 6.0 percent of original size [2021-11-07 08:44:39,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 23 select indices, 23 select index equivalence classes, 21 disjoint index pairs (out of 253 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 225 treesize of output 290 [2021-11-07 08:44:41,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:41,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:41,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:41,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:41,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:41,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:41,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:41,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:41,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:41,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:41,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:41,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:41,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:41,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:41,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:41,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:41,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:41,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:41,719 INFO L354 Elim1Store]: treesize reduction 1606, result has 4.7 percent of original size [2021-11-07 08:44:41,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 26 select indices, 26 select index equivalence classes, 21 disjoint index pairs (out of 325 index pairs), introduced 26 new quantified variables, introduced 90 case distinctions, treesize of input 274 treesize of output 348 [2021-11-07 08:44:43,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:43,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:43,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:43,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:43,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:43,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:43,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:43,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:43,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:43,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:43,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:43,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:43,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:43,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:43,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:43,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:43,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:43,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:45,008 INFO L354 Elim1Store]: treesize reduction 2195, result has 4.1 percent of original size [2021-11-07 08:44:45,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 29 select indices, 29 select index equivalence classes, 21 disjoint index pairs (out of 406 index pairs), introduced 29 new quantified variables, introduced 117 case distinctions, treesize of input 323 treesize of output 406 [2021-11-07 08:44:45,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:45,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:45,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:45,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:45,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:45,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:45,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:45,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:45,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:45,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:45,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:45,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:45,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:45,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:45,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:45,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:45,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:45,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:47,072 INFO L354 Elim1Store]: treesize reduction 2195, result has 4.1 percent of original size [2021-11-07 08:44:47,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 29 select indices, 29 select index equivalence classes, 21 disjoint index pairs (out of 406 index pairs), introduced 29 new quantified variables, introduced 117 case distinctions, treesize of input 323 treesize of output 406 [2021-11-07 08:44:47,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:47,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:47,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:47,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:47,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:47,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:47,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:47,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:47,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:47,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:47,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:47,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:47,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:47,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:47,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:47,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:47,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:47,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:49,300 INFO L354 Elim1Store]: treesize reduction 2195, result has 4.1 percent of original size [2021-11-07 08:44:49,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 29 select indices, 29 select index equivalence classes, 21 disjoint index pairs (out of 406 index pairs), introduced 29 new quantified variables, introduced 117 case distinctions, treesize of input 323 treesize of output 406 [2021-11-07 08:44:49,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:49,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:49,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:49,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:49,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:49,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:49,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:49,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:49,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:49,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:49,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:49,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:49,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:49,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:49,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:49,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:49,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:49,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:50,531 INFO L354 Elim1Store]: treesize reduction 2195, result has 4.1 percent of original size [2021-11-07 08:44:50,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 29 select indices, 29 select index equivalence classes, 21 disjoint index pairs (out of 406 index pairs), introduced 29 new quantified variables, introduced 117 case distinctions, treesize of input 323 treesize of output 406 [2021-11-07 08:44:51,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:51,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:51,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:51,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:51,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:51,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:51,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:51,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:51,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:51,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:51,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:51,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:51,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:51,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:51,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:51,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:51,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:51,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:53,037 INFO L354 Elim1Store]: treesize reduction 2195, result has 4.1 percent of original size [2021-11-07 08:44:53,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 29 select indices, 29 select index equivalence classes, 21 disjoint index pairs (out of 406 index pairs), introduced 29 new quantified variables, introduced 117 case distinctions, treesize of input 323 treesize of output 406 [2021-11-07 08:44:53,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:53,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:53,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:53,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:53,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:53,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:53,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:53,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:53,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:53,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:53,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:53,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:53,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:53,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:53,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:53,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:53,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:53,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:55,666 INFO L354 Elim1Store]: treesize reduction 2195, result has 4.1 percent of original size [2021-11-07 08:44:55,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 29 select indices, 29 select index equivalence classes, 21 disjoint index pairs (out of 406 index pairs), introduced 29 new quantified variables, introduced 117 case distinctions, treesize of input 323 treesize of output 406 [2021-11-07 08:44:56,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:56,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:56,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:56,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:56,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:56,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:56,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:56,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:56,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:56,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:56,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:56,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:56,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:56,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:56,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:56,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:56,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:56,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:44:57,899 INFO L354 Elim1Store]: treesize reduction 2195, result has 4.1 percent of original size [2021-11-07 08:44:57,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 29 select indices, 29 select index equivalence classes, 21 disjoint index pairs (out of 406 index pairs), introduced 29 new quantified variables, introduced 117 case distinctions, treesize of input 323 treesize of output 406 [2021-11-07 08:45:10,006 INFO L354 Elim1Store]: treesize reduction 3976, result has 3.1 percent of original size [2021-11-07 08:45:10,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 27 select indices, 27 select index equivalence classes, 6 disjoint index pairs (out of 351 index pairs), introduced 27 new quantified variables, introduced 351 case distinctions, treesize of input 287 treesize of output 241 [2021-11-07 08:45:10,129 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 24 proven. 202 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2021-11-07 08:45:10,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:45:10,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203302147] [2021-11-07 08:45:10,129 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:45:10,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598682770] [2021-11-07 08:45:10,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598682770] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:45:10,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:45:10,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-07 08:45:10,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273486866] [2021-11-07 08:45:10,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 08:45:10,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:45:10,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 08:45:10,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=463, Unknown=2, NotChecked=0, Total=552 [2021-11-07 08:45:10,132 INFO L87 Difference]: Start difference. First operand 90 states and 105 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)