./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label59.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_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/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_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label59.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/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_26071464-fb02-4734-867d-d0a6864c5ce8/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 2d68e7262b60a12a6597b15e2848fbc8314c4945758acd933fd69212a55e4a41 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:13:35,372 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:13:35,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:13:35,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:13:35,430 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:13:35,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:13:35,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:13:35,438 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:13:35,440 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:13:35,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:13:35,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:13:35,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:13:35,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:13:35,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:13:35,446 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:13:35,448 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:13:35,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:13:35,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:13:35,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:13:35,454 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:13:35,456 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:13:35,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:13:35,459 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:13:35,460 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:13:35,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:13:35,469 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:13:35,470 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:13:35,471 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:13:35,472 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:13:35,474 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:13:35,475 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:13:35,476 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:13:35,477 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:13:35,478 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:13:35,480 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:13:35,481 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:13:35,481 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:13:35,482 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:13:35,482 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:13:35,483 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:13:35,484 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:13:35,485 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:13:35,529 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:13:35,530 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:13:35,531 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:13:35,531 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:13:35,539 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:13:35,539 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:13:35,540 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:13:35,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:13:35,540 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:13:35,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:13:35,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:13:35,542 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:13:35,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:13:35,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:13:35,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:13:35,543 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:13:35,543 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:13:35,543 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:13:35,543 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:13:35,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:13:35,544 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:13:35,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:13:35,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:13:35,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:13:35,545 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:13:35,545 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:13:35,545 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:13:35,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:13:35,546 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:13:35,546 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:13:35,546 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:13:35,546 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:13:35,547 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_26071464-fb02-4734-867d-d0a6864c5ce8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d68e7262b60a12a6597b15e2848fbc8314c4945758acd933fd69212a55e4a41 [2021-11-07 08:13:35,824 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:13:35,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:13:35,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:13:35,848 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:13:35,849 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:13:35,850 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/eca-rers2012/Problem03_label59.c [2021-11-07 08:13:35,918 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/data/6ff4ae871/3b6b834c66c6406090a1c096fde5ae97/FLAG354f3606d [2021-11-07 08:13:36,564 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:13:36,565 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/sv-benchmarks/c/eca-rers2012/Problem03_label59.c [2021-11-07 08:13:36,583 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/data/6ff4ae871/3b6b834c66c6406090a1c096fde5ae97/FLAG354f3606d [2021-11-07 08:13:36,728 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/data/6ff4ae871/3b6b834c66c6406090a1c096fde5ae97 [2021-11-07 08:13:36,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:13:36,732 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:13:36,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:13:36,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:13:36,737 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:13:36,738 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:13:36" (1/1) ... [2021-11-07 08:13:36,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@188872d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:36, skipping insertion in model container [2021-11-07 08:13:36,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:13:36" (1/1) ... [2021-11-07 08:13:36,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:13:36,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:13:37,565 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_26071464-fb02-4734-867d-d0a6864c5ce8/sv-benchmarks/c/eca-rers2012/Problem03_label59.c[57711,57724] [2021-11-07 08:13:37,607 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:13:37,618 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:13:37,917 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_26071464-fb02-4734-867d-d0a6864c5ce8/sv-benchmarks/c/eca-rers2012/Problem03_label59.c[57711,57724] [2021-11-07 08:13:37,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:13:37,949 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:13:37,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:37 WrapperNode [2021-11-07 08:13:37,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:13:37,951 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:13:37,952 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:13:37,952 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:13:37,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:37" (1/1) ... [2021-11-07 08:13:38,010 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:37" (1/1) ... [2021-11-07 08:13:38,105 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:13:38,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:13:38,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:13:38,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:13:38,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:37" (1/1) ... [2021-11-07 08:13:38,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:37" (1/1) ... [2021-11-07 08:13:38,139 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:37" (1/1) ... [2021-11-07 08:13:38,139 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:37" (1/1) ... [2021-11-07 08:13:38,237 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:37" (1/1) ... [2021-11-07 08:13:38,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:37" (1/1) ... [2021-11-07 08:13:38,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:37" (1/1) ... [2021-11-07 08:13:38,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:13:38,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:13:38,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:13:38,295 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:13:38,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:37" (1/1) ... [2021-11-07 08:13:38,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:13:38,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:38,325 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:13:38,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:13:38,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:13:38,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:13:38,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:13:38,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:13:40,362 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:13:40,363 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-07 08:13:40,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:13:40 BoogieIcfgContainer [2021-11-07 08:13:40,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:13:40,368 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:13:40,368 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:13:40,371 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:13:40,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:13:36" (1/3) ... [2021-11-07 08:13:40,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab2ca53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:13:40, skipping insertion in model container [2021-11-07 08:13:40,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:37" (2/3) ... [2021-11-07 08:13:40,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab2ca53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:13:40, skipping insertion in model container [2021-11-07 08:13:40,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:13:40" (3/3) ... [2021-11-07 08:13:40,374 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label59.c [2021-11-07 08:13:40,379 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:13:40,380 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:13:40,427 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:13:40,433 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 08:13:40,433 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:13:40,457 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states 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 08:13:40,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-07 08:13:40,474 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:40,475 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:40,475 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:40,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:40,481 INFO L85 PathProgramCache]: Analyzing trace with hash -825651366, now seen corresponding path program 1 times [2021-11-07 08:13:40,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:40,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775400487] [2021-11-07 08:13:40,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:40,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:40,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:41,088 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 08:13:41,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:41,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775400487] [2021-11-07 08:13:41,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775400487] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:13:41,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:13:41,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:13:41,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979612765] [2021-11-07 08:13:41,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:13:41,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:41,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:13:41,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:13:41,114 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:42,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:42,337 INFO L93 Difference]: Finished difference Result 864 states and 1514 transitions. [2021-11-07 08:13:42,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:13:42,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-11-07 08:13:42,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:42,365 INFO L225 Difference]: With dead ends: 864 [2021-11-07 08:13:42,366 INFO L226 Difference]: Without dead ends: 468 [2021-11-07 08:13:42,374 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 08:13:42,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-11-07 08:13:42,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 454. [2021-11-07 08:13:42,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.6269315673289184) internal successors, (737), 453 states have internal predecessors, (737), 0 states have call successors, (0), 0 states 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 08:13:42,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 737 transitions. [2021-11-07 08:13:42,446 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 737 transitions. Word has length 174 [2021-11-07 08:13:42,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:42,450 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 737 transitions. [2021-11-07 08:13:42,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:42,451 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 737 transitions. [2021-11-07 08:13:42,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-07 08:13:42,461 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:42,461 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:42,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:13:42,462 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:42,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:42,466 INFO L85 PathProgramCache]: Analyzing trace with hash -206951382, now seen corresponding path program 1 times [2021-11-07 08:13:42,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:42,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90012059] [2021-11-07 08:13:42,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:42,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:42,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:42,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:42,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90012059] [2021-11-07 08:13:42,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90012059] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:13:42,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:13:42,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:13:42,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621849469] [2021-11-07 08:13:42,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:13:42,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:42,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:13:42,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:13:42,645 INFO L87 Difference]: Start difference. First operand 454 states and 737 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states 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 08:13:43,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:43,529 INFO L93 Difference]: Finished difference Result 1330 states and 2169 transitions. [2021-11-07 08:13:43,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:13:43,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 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 179 [2021-11-07 08:13:43,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:43,535 INFO L225 Difference]: With dead ends: 1330 [2021-11-07 08:13:43,536 INFO L226 Difference]: Without dead ends: 878 [2021-11-07 08:13:43,537 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 08:13:43,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-11-07 08:13:43,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 874. [2021-11-07 08:13:43,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 1.52233676975945) internal successors, (1329), 873 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states 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 08:13:43,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1329 transitions. [2021-11-07 08:13:43,604 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1329 transitions. Word has length 179 [2021-11-07 08:13:43,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:43,604 INFO L470 AbstractCegarLoop]: Abstraction has 874 states and 1329 transitions. [2021-11-07 08:13:43,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states 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 08:13:43,605 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1329 transitions. [2021-11-07 08:13:43,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-07 08:13:43,616 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:43,617 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:43,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:13:43,618 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:43,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:43,620 INFO L85 PathProgramCache]: Analyzing trace with hash -834312519, now seen corresponding path program 1 times [2021-11-07 08:13:43,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:43,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079979502] [2021-11-07 08:13:43,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:43,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:43,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:43,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:43,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079979502] [2021-11-07 08:13:43,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079979502] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:13:43,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:13:43,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:13:43,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929061701] [2021-11-07 08:13:43,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:13:43,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:43,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:13:43,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:13:43,720 INFO L87 Difference]: Start difference. First operand 874 states and 1329 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states 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 08:13:44,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:44,641 INFO L93 Difference]: Finished difference Result 2575 states and 3935 transitions. [2021-11-07 08:13:44,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:13:44,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2021-11-07 08:13:44,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:44,651 INFO L225 Difference]: With dead ends: 2575 [2021-11-07 08:13:44,652 INFO L226 Difference]: Without dead ends: 1703 [2021-11-07 08:13:44,653 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 08:13:44,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2021-11-07 08:13:44,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1687. [2021-11-07 08:13:44,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 1.4994068801897984) internal successors, (2528), 1686 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states 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 08:13:44,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 2528 transitions. [2021-11-07 08:13:44,707 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 2528 transitions. Word has length 182 [2021-11-07 08:13:44,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:44,708 INFO L470 AbstractCegarLoop]: Abstraction has 1687 states and 2528 transitions. [2021-11-07 08:13:44,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states 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 08:13:44,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 2528 transitions. [2021-11-07 08:13:44,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-07 08:13:44,714 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:44,714 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:44,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 08:13:44,715 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:44,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:44,716 INFO L85 PathProgramCache]: Analyzing trace with hash 994201524, now seen corresponding path program 1 times [2021-11-07 08:13:44,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:44,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187265280] [2021-11-07 08:13:44,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:44,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:44,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:44,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:44,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187265280] [2021-11-07 08:13:44,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187265280] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:13:44,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:13:44,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:13:44,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318116134] [2021-11-07 08:13:44,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:13:44,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:44,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:13:44,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:13:44,822 INFO L87 Difference]: Start difference. First operand 1687 states and 2528 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 08:13:45,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:45,790 INFO L93 Difference]: Finished difference Result 4194 states and 6266 transitions. [2021-11-07 08:13:45,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:13:45,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 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 184 [2021-11-07 08:13:45,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:45,808 INFO L225 Difference]: With dead ends: 4194 [2021-11-07 08:13:45,808 INFO L226 Difference]: Without dead ends: 2509 [2021-11-07 08:13:45,815 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 08:13:45,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2021-11-07 08:13:45,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 2508. [2021-11-07 08:13:45,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 2507 states have (on average 1.4670921420023932) internal successors, (3678), 2507 states have internal predecessors, (3678), 0 states have call successors, (0), 0 states 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 08:13:45,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 3678 transitions. [2021-11-07 08:13:45,901 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 3678 transitions. Word has length 184 [2021-11-07 08:13:45,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:45,902 INFO L470 AbstractCegarLoop]: Abstraction has 2508 states and 3678 transitions. [2021-11-07 08:13:45,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 08:13:45,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 3678 transitions. [2021-11-07 08:13:45,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-07 08:13:45,909 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:45,909 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:45,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 08:13:45,910 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:45,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:45,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2049388324, now seen corresponding path program 1 times [2021-11-07 08:13:45,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:45,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745855680] [2021-11-07 08:13:45,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:45,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:45,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:46,143 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:46,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:46,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745855680] [2021-11-07 08:13:46,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745855680] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:46,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78531203] [2021-11-07 08:13:46,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:46,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:46,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:46,146 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:13:46,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:13:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:46,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 08:13:46,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:47,037 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:13:47,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78531203] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:13:47,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:13:47,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-07 08:13:47,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253183379] [2021-11-07 08:13:47,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:13:47,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:47,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:13:47,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:13:47,039 INFO L87 Difference]: Start difference. First operand 2508 states and 3678 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 08:13:47,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:47,969 INFO L93 Difference]: Finished difference Result 7453 states and 10941 transitions. [2021-11-07 08:13:47,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:13:47,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 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 189 [2021-11-07 08:13:47,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:47,998 INFO L225 Difference]: With dead ends: 7453 [2021-11-07 08:13:47,998 INFO L226 Difference]: Without dead ends: 4947 [2021-11-07 08:13:48,002 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:13:48,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4947 states. [2021-11-07 08:13:48,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4947 to 4133. [2021-11-07 08:13:48,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4133 states, 4132 states have (on average 1.334220716360116) internal successors, (5513), 4132 states have internal predecessors, (5513), 0 states have call successors, (0), 0 states 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 08:13:48,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4133 states to 4133 states and 5513 transitions. [2021-11-07 08:13:48,121 INFO L78 Accepts]: Start accepts. Automaton has 4133 states and 5513 transitions. Word has length 189 [2021-11-07 08:13:48,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:48,122 INFO L470 AbstractCegarLoop]: Abstraction has 4133 states and 5513 transitions. [2021-11-07 08:13:48,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 08:13:48,122 INFO L276 IsEmpty]: Start isEmpty. Operand 4133 states and 5513 transitions. [2021-11-07 08:13:48,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-07 08:13:48,132 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:48,132 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:48,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:13:48,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:48,349 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:48,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:48,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1197556103, now seen corresponding path program 1 times [2021-11-07 08:13:48,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:48,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798809959] [2021-11-07 08:13:48,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:48,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:48,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:48,426 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:48,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:48,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798809959] [2021-11-07 08:13:48,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798809959] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:13:48,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:13:48,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:13:48,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718721951] [2021-11-07 08:13:48,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:13:48,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:48,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:13:48,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:13:48,429 INFO L87 Difference]: Start difference. First operand 4133 states and 5513 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states 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 08:13:49,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:49,445 INFO L93 Difference]: Finished difference Result 10702 states and 14610 transitions. [2021-11-07 08:13:49,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:13:49,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 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 193 [2021-11-07 08:13:49,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:49,481 INFO L225 Difference]: With dead ends: 10702 [2021-11-07 08:13:49,481 INFO L226 Difference]: Without dead ends: 6571 [2021-11-07 08:13:49,486 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 08:13:49,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6571 states. [2021-11-07 08:13:49,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6571 to 6569. [2021-11-07 08:13:49,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6569 states, 6568 states have (on average 1.2742082825822167) internal successors, (8369), 6568 states have internal predecessors, (8369), 0 states have call successors, (0), 0 states 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 08:13:49,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6569 states to 6569 states and 8369 transitions. [2021-11-07 08:13:49,653 INFO L78 Accepts]: Start accepts. Automaton has 6569 states and 8369 transitions. Word has length 193 [2021-11-07 08:13:49,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:49,654 INFO L470 AbstractCegarLoop]: Abstraction has 6569 states and 8369 transitions. [2021-11-07 08:13:49,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states 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 08:13:49,654 INFO L276 IsEmpty]: Start isEmpty. Operand 6569 states and 8369 transitions. [2021-11-07 08:13:49,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-07 08:13:49,667 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:49,667 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:49,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 08:13:49,668 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:49,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:49,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1745267993, now seen corresponding path program 1 times [2021-11-07 08:13:49,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:49,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675899841] [2021-11-07 08:13:49,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:49,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:49,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:49,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:49,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675899841] [2021-11-07 08:13:49,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675899841] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:13:49,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:13:49,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:13:49,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500990870] [2021-11-07 08:13:49,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:13:49,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:49,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:13:49,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:13:49,763 INFO L87 Difference]: Start difference. First operand 6569 states and 8369 transitions. Second operand has 4 states, 4 states have (on average 50.25) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states 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 08:13:51,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:51,202 INFO L93 Difference]: Finished difference Result 25389 states and 32264 transitions. [2021-11-07 08:13:51,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:13:51,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.25) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 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 201 [2021-11-07 08:13:51,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:51,292 INFO L225 Difference]: With dead ends: 25389 [2021-11-07 08:13:51,292 INFO L226 Difference]: Without dead ends: 18822 [2021-11-07 08:13:51,303 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 08:13:51,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18822 states. [2021-11-07 08:13:51,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18822 to 18409. [2021-11-07 08:13:51,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18409 states, 18408 states have (on average 1.255812690134724) internal successors, (23117), 18408 states have internal predecessors, (23117), 0 states have call successors, (0), 0 states 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 08:13:51,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18409 states to 18409 states and 23117 transitions. [2021-11-07 08:13:51,770 INFO L78 Accepts]: Start accepts. Automaton has 18409 states and 23117 transitions. Word has length 201 [2021-11-07 08:13:51,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:51,771 INFO L470 AbstractCegarLoop]: Abstraction has 18409 states and 23117 transitions. [2021-11-07 08:13:51,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.25) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states 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 08:13:51,773 INFO L276 IsEmpty]: Start isEmpty. Operand 18409 states and 23117 transitions. [2021-11-07 08:13:51,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-07 08:13:51,803 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:51,804 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:51,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 08:13:51,804 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:51,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:51,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1060550128, now seen corresponding path program 1 times [2021-11-07 08:13:51,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:51,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551752500] [2021-11-07 08:13:51,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:51,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:51,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:51,899 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 08:13:51,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:51,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551752500] [2021-11-07 08:13:51,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551752500] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:13:51,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:13:51,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:13:51,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761252430] [2021-11-07 08:13:51,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:13:51,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:51,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:13:51,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:13:51,904 INFO L87 Difference]: Start difference. First operand 18409 states and 23117 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:53,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:53,060 INFO L93 Difference]: Finished difference Result 54159 states and 68090 transitions. [2021-11-07 08:13:53,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:13:53,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 216 [2021-11-07 08:13:53,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:53,134 INFO L225 Difference]: With dead ends: 54159 [2021-11-07 08:13:53,135 INFO L226 Difference]: Without dead ends: 35752 [2021-11-07 08:13:53,156 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 08:13:53,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35752 states. [2021-11-07 08:13:53,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35752 to 35331. [2021-11-07 08:13:53,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35331 states, 35330 states have (on average 1.252136994056043) internal successors, (44238), 35330 states have internal predecessors, (44238), 0 states have call successors, (0), 0 states 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 08:13:53,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35331 states to 35331 states and 44238 transitions. [2021-11-07 08:13:53,928 INFO L78 Accepts]: Start accepts. Automaton has 35331 states and 44238 transitions. Word has length 216 [2021-11-07 08:13:53,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:53,929 INFO L470 AbstractCegarLoop]: Abstraction has 35331 states and 44238 transitions. [2021-11-07 08:13:53,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:53,929 INFO L276 IsEmpty]: Start isEmpty. Operand 35331 states and 44238 transitions. [2021-11-07 08:13:53,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-07 08:13:53,978 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:53,978 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:53,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 08:13:53,979 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:53,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:53,979 INFO L85 PathProgramCache]: Analyzing trace with hash -752667059, now seen corresponding path program 1 times [2021-11-07 08:13:53,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:53,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563259365] [2021-11-07 08:13:53,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:53,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:54,094 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 58 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 08:13:54,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:54,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563259365] [2021-11-07 08:13:54,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563259365] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:54,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636367202] [2021-11-07 08:13:54,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:54,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:54,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:54,106 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:13:54,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:13:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:54,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 08:13:54,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:55,099 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-07 08:13:55,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636367202] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:13:55,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:13:55,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-11-07 08:13:55,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334763306] [2021-11-07 08:13:55,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:13:55,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:55,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:13:55,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:13:55,103 INFO L87 Difference]: Start difference. First operand 35331 states and 44238 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states 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 08:13:56,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:56,487 INFO L93 Difference]: Finished difference Result 102814 states and 128746 transitions. [2021-11-07 08:13:56,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:13:56,487 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 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 229 [2021-11-07 08:13:56,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:56,628 INFO L225 Difference]: With dead ends: 102814 [2021-11-07 08:13:56,628 INFO L226 Difference]: Without dead ends: 67485 [2021-11-07 08:13:56,668 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:13:56,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67485 states. [2021-11-07 08:13:57,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67485 to 66463. [2021-11-07 08:13:57,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66463 states, 66462 states have (on average 1.2254069994884296) internal successors, (81443), 66462 states have internal predecessors, (81443), 0 states have call successors, (0), 0 states 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 08:13:58,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66463 states to 66463 states and 81443 transitions. [2021-11-07 08:13:58,191 INFO L78 Accepts]: Start accepts. Automaton has 66463 states and 81443 transitions. Word has length 229 [2021-11-07 08:13:58,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:58,192 INFO L470 AbstractCegarLoop]: Abstraction has 66463 states and 81443 transitions. [2021-11-07 08:13:58,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states 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 08:13:58,192 INFO L276 IsEmpty]: Start isEmpty. Operand 66463 states and 81443 transitions. [2021-11-07 08:13:58,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-07 08:13:58,340 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:58,340 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:58,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:13:58,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:58,566 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:58,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:58,567 INFO L85 PathProgramCache]: Analyzing trace with hash -2047108928, now seen corresponding path program 1 times [2021-11-07 08:13:58,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:58,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122267826] [2021-11-07 08:13:58,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:58,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 61 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 08:13:58,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:58,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122267826] [2021-11-07 08:13:58,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122267826] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:58,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906242460] [2021-11-07 08:13:58,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:58,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:58,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:58,742 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:13:58,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:13:59,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:59,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 08:13:59,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-07 08:13:59,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906242460] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:13:59,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:13:59,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-07 08:13:59,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751430687] [2021-11-07 08:13:59,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:13:59,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:59,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:13:59,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:13:59,938 INFO L87 Difference]: Start difference. First operand 66463 states and 81443 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:01,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:01,072 INFO L93 Difference]: Finished difference Result 132933 states and 162900 transitions. [2021-11-07 08:14:01,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:14:01,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 232 [2021-11-07 08:14:01,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:01,187 INFO L225 Difference]: With dead ends: 132933 [2021-11-07 08:14:01,187 INFO L226 Difference]: Without dead ends: 66472 [2021-11-07 08:14:01,215 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:14:01,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66472 states. [2021-11-07 08:14:02,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66472 to 64636. [2021-11-07 08:14:02,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64636 states, 64635 states have (on average 1.2009128181325908) internal successors, (77621), 64635 states have internal predecessors, (77621), 0 states have call successors, (0), 0 states 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 08:14:02,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64636 states to 64636 states and 77621 transitions. [2021-11-07 08:14:02,286 INFO L78 Accepts]: Start accepts. Automaton has 64636 states and 77621 transitions. Word has length 232 [2021-11-07 08:14:02,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:02,287 INFO L470 AbstractCegarLoop]: Abstraction has 64636 states and 77621 transitions. [2021-11-07 08:14:02,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:02,287 INFO L276 IsEmpty]: Start isEmpty. Operand 64636 states and 77621 transitions. [2021-11-07 08:14:02,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-11-07 08:14:02,324 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:02,324 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:02,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:02,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:02,550 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:02,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:02,551 INFO L85 PathProgramCache]: Analyzing trace with hash 88987123, now seen corresponding path program 1 times [2021-11-07 08:14:02,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:02,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434352997] [2021-11-07 08:14:02,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:02,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:02,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:02,739 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:02,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:02,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434352997] [2021-11-07 08:14:02,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434352997] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:02,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555984445] [2021-11-07 08:14:02,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:02,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:02,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:02,741 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:02,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:14:03,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:03,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:14:03,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:03,964 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 08:14:03,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555984445] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:03,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:14:03,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-07 08:14:03,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481089189] [2021-11-07 08:14:03,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:14:03,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:03,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:14:03,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:14:03,966 INFO L87 Difference]: Start difference. First operand 64636 states and 77621 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states 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 08:14:05,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:05,258 INFO L93 Difference]: Finished difference Result 157133 states and 188824 transitions. [2021-11-07 08:14:05,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:14:05,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 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 234 [2021-11-07 08:14:05,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:05,406 INFO L225 Difference]: With dead ends: 157133 [2021-11-07 08:14:05,406 INFO L226 Difference]: Without dead ends: 92499 [2021-11-07 08:14:05,450 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:14:05,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92499 states. [2021-11-07 08:14:06,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92499 to 90243. [2021-11-07 08:14:06,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90243 states, 90242 states have (on average 1.1807805678065646) internal successors, (106556), 90242 states have internal predecessors, (106556), 0 states have call successors, (0), 0 states 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 08:14:07,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90243 states to 90243 states and 106556 transitions. [2021-11-07 08:14:07,009 INFO L78 Accepts]: Start accepts. Automaton has 90243 states and 106556 transitions. Word has length 234 [2021-11-07 08:14:07,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:07,010 INFO L470 AbstractCegarLoop]: Abstraction has 90243 states and 106556 transitions. [2021-11-07 08:14:07,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states 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 08:14:07,010 INFO L276 IsEmpty]: Start isEmpty. Operand 90243 states and 106556 transitions. [2021-11-07 08:14:07,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-11-07 08:14:07,058 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:07,058 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:07,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:07,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:07,286 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:07,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:07,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1247796774, now seen corresponding path program 1 times [2021-11-07 08:14:07,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:07,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285640760] [2021-11-07 08:14:07,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:07,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:07,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:07,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:07,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285640760] [2021-11-07 08:14:07,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285640760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:07,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:07,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:14:07,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401239749] [2021-11-07 08:14:07,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:14:07,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:07,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:14:07,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:14:07,442 INFO L87 Difference]: Start difference. First operand 90243 states and 106556 transitions. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 2 states have internal predecessors, (248), 0 states have call successors, (0), 0 states 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 08:14:08,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:08,984 INFO L93 Difference]: Finished difference Result 183346 states and 216336 transitions. [2021-11-07 08:14:08,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:14:08,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 2 states have internal predecessors, (248), 0 states have call successors, (0), 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 248 [2021-11-07 08:14:08,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:09,097 INFO L225 Difference]: With dead ends: 183346 [2021-11-07 08:14:09,097 INFO L226 Difference]: Without dead ends: 93308 [2021-11-07 08:14:09,152 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 08:14:09,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93308 states. [2021-11-07 08:14:10,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93308 to 93292. [2021-11-07 08:14:10,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93292 states, 93291 states have (on average 1.1783023014009926) internal successors, (109925), 93291 states have internal predecessors, (109925), 0 states have call successors, (0), 0 states 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 08:14:10,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93292 states to 93292 states and 109925 transitions. [2021-11-07 08:14:10,616 INFO L78 Accepts]: Start accepts. Automaton has 93292 states and 109925 transitions. Word has length 248 [2021-11-07 08:14:10,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:10,616 INFO L470 AbstractCegarLoop]: Abstraction has 93292 states and 109925 transitions. [2021-11-07 08:14:10,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 2 states have internal predecessors, (248), 0 states have call successors, (0), 0 states 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 08:14:10,616 INFO L276 IsEmpty]: Start isEmpty. Operand 93292 states and 109925 transitions. [2021-11-07 08:14:10,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-11-07 08:14:10,933 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:10,934 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:10,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 08:14:10,935 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:10,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:10,935 INFO L85 PathProgramCache]: Analyzing trace with hash 166986337, now seen corresponding path program 1 times [2021-11-07 08:14:10,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:10,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187170073] [2021-11-07 08:14:10,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:10,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:10,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 86 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-07 08:14:11,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:11,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187170073] [2021-11-07 08:14:11,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187170073] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:11,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601749685] [2021-11-07 08:14:11,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:11,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:11,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:11,070 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:11,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:14:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:11,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 08:14:11,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:12,212 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-07 08:14:12,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601749685] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:12,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:14:12,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-07 08:14:12,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307183772] [2021-11-07 08:14:12,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:14:12,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:12,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:14:12,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:14:12,214 INFO L87 Difference]: Start difference. First operand 93292 states and 109925 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:13,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:13,717 INFO L93 Difference]: Finished difference Result 179348 states and 211216 transitions. [2021-11-07 08:14:13,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:14:13,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 251 [2021-11-07 08:14:13,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:13,810 INFO L225 Difference]: With dead ends: 179348 [2021-11-07 08:14:13,811 INFO L226 Difference]: Without dead ends: 86870 [2021-11-07 08:14:13,842 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:14:13,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86870 states. [2021-11-07 08:14:14,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86870 to 86796. [2021-11-07 08:14:15,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86796 states, 86795 states have (on average 1.1671524857422662) internal successors, (101303), 86795 states have internal predecessors, (101303), 0 states have call successors, (0), 0 states 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 08:14:15,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86796 states to 86796 states and 101303 transitions. [2021-11-07 08:14:15,103 INFO L78 Accepts]: Start accepts. Automaton has 86796 states and 101303 transitions. Word has length 251 [2021-11-07 08:14:15,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:15,103 INFO L470 AbstractCegarLoop]: Abstraction has 86796 states and 101303 transitions. [2021-11-07 08:14:15,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:15,104 INFO L276 IsEmpty]: Start isEmpty. Operand 86796 states and 101303 transitions. [2021-11-07 08:14:15,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-11-07 08:14:15,151 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:15,152 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:15,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:15,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-07 08:14:15,354 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:15,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:15,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1658340997, now seen corresponding path program 1 times [2021-11-07 08:14:15,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:15,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595451541] [2021-11-07 08:14:15,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:15,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:15,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:15,470 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 98 proven. 6 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-07 08:14:15,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:15,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595451541] [2021-11-07 08:14:15,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595451541] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:15,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106872811] [2021-11-07 08:14:15,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:15,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:15,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:15,472 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:15,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 08:14:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:15,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:14:15,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-07 08:14:16,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106872811] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:16,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:14:16,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-11-07 08:14:16,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734961438] [2021-11-07 08:14:16,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:14:16,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:16,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:14:16,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:14:16,466 INFO L87 Difference]: Start difference. First operand 86796 states and 101303 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 2 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:17,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:17,648 INFO L93 Difference]: Finished difference Result 158675 states and 185877 transitions. [2021-11-07 08:14:17,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:14:17,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 2 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 274 [2021-11-07 08:14:17,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:17,727 INFO L225 Difference]: With dead ends: 158675 [2021-11-07 08:14:17,727 INFO L226 Difference]: Without dead ends: 73505 [2021-11-07 08:14:17,762 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:14:17,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73505 states. [2021-11-07 08:14:18,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73505 to 72693. [2021-11-07 08:14:18,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72693 states, 72692 states have (on average 1.1651350905189017) internal successors, (84696), 72692 states have internal predecessors, (84696), 0 states have call successors, (0), 0 states 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 08:14:18,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72693 states to 72693 states and 84696 transitions. [2021-11-07 08:14:18,840 INFO L78 Accepts]: Start accepts. Automaton has 72693 states and 84696 transitions. Word has length 274 [2021-11-07 08:14:18,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:18,840 INFO L470 AbstractCegarLoop]: Abstraction has 72693 states and 84696 transitions. [2021-11-07 08:14:18,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 2 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:18,841 INFO L276 IsEmpty]: Start isEmpty. Operand 72693 states and 84696 transitions. [2021-11-07 08:14:18,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-11-07 08:14:18,870 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:18,871 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:18,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:19,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:19,072 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:19,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:19,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1175073356, now seen corresponding path program 1 times [2021-11-07 08:14:19,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:19,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503712576] [2021-11-07 08:14:19,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:19,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:19,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:19,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:19,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503712576] [2021-11-07 08:14:19,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503712576] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:19,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:19,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:14:19,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45067541] [2021-11-07 08:14:19,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:14:19,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:19,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:14:19,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:14:19,247 INFO L87 Difference]: Start difference. First operand 72693 states and 84696 transitions. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 2 states have internal predecessors, (304), 0 states have call successors, (0), 0 states 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 08:14:20,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:20,786 INFO L93 Difference]: Finished difference Result 150911 states and 175832 transitions. [2021-11-07 08:14:20,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:14:20,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 2 states have internal predecessors, (304), 0 states have call successors, (0), 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 304 [2021-11-07 08:14:20,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:20,870 INFO L225 Difference]: With dead ends: 150911 [2021-11-07 08:14:20,871 INFO L226 Difference]: Without dead ends: 80859 [2021-11-07 08:14:20,904 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 08:14:20,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80859 states. [2021-11-07 08:14:21,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80859 to 80813. [2021-11-07 08:14:22,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80813 states, 80812 states have (on average 1.141748750185616) internal successors, (92267), 80812 states have internal predecessors, (92267), 0 states have call successors, (0), 0 states 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 08:14:22,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80813 states to 80813 states and 92267 transitions. [2021-11-07 08:14:22,112 INFO L78 Accepts]: Start accepts. Automaton has 80813 states and 92267 transitions. Word has length 304 [2021-11-07 08:14:22,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:22,113 INFO L470 AbstractCegarLoop]: Abstraction has 80813 states and 92267 transitions. [2021-11-07 08:14:22,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 2 states have internal predecessors, (304), 0 states have call successors, (0), 0 states 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 08:14:22,113 INFO L276 IsEmpty]: Start isEmpty. Operand 80813 states and 92267 transitions. [2021-11-07 08:14:22,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-11-07 08:14:22,144 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:22,145 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:22,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 08:14:22,145 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:22,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:22,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1218688759, now seen corresponding path program 1 times [2021-11-07 08:14:22,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:22,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530834643] [2021-11-07 08:14:22,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:22,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:22,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:22,494 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 136 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:22,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:22,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530834643] [2021-11-07 08:14:22,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530834643] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:22,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530004079] [2021-11-07 08:14:22,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:22,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:22,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:22,496 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:22,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 08:14:23,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:23,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:14:23,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:24,569 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:24,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530004079] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:24,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:14:24,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-07 08:14:24,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977340409] [2021-11-07 08:14:24,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:14:24,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:24,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:14:24,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:14:24,572 INFO L87 Difference]: Start difference. First operand 80813 states and 92267 transitions. Second operand has 4 states, 4 states have (on average 77.75) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states 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 08:14:25,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:25,869 INFO L93 Difference]: Finished difference Result 178109 states and 204119 transitions. [2021-11-07 08:14:25,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:14:25,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 77.75) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 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 311 [2021-11-07 08:14:25,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:25,976 INFO L225 Difference]: With dead ends: 178109 [2021-11-07 08:14:25,976 INFO L226 Difference]: Without dead ends: 98922 [2021-11-07 08:14:26,010 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:14:26,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98922 states. [2021-11-07 08:14:27,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98922 to 87893. [2021-11-07 08:14:27,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87893 states, 87892 states have (on average 1.1149706457925637) internal successors, (97997), 87892 states have internal predecessors, (97997), 0 states have call successors, (0), 0 states 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 08:14:27,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87893 states to 87893 states and 97997 transitions. [2021-11-07 08:14:27,691 INFO L78 Accepts]: Start accepts. Automaton has 87893 states and 97997 transitions. Word has length 311 [2021-11-07 08:14:27,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:27,691 INFO L470 AbstractCegarLoop]: Abstraction has 87893 states and 97997 transitions. [2021-11-07 08:14:27,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.75) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states 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 08:14:27,691 INFO L276 IsEmpty]: Start isEmpty. Operand 87893 states and 97997 transitions. [2021-11-07 08:14:27,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2021-11-07 08:14:27,736 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:27,736 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:27,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:27,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 08:14:27,938 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:27,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:27,939 INFO L85 PathProgramCache]: Analyzing trace with hash 56649622, now seen corresponding path program 1 times [2021-11-07 08:14:27,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:27,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407416419] [2021-11-07 08:14:27,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:27,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:28,161 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:14:28,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:28,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407416419] [2021-11-07 08:14:28,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407416419] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:28,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:28,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:14:28,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295774863] [2021-11-07 08:14:28,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:14:28,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:28,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:14:28,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:14:28,164 INFO L87 Difference]: Start difference. First operand 87893 states and 97997 transitions. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states 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 08:14:29,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:29,362 INFO L93 Difference]: Finished difference Result 163376 states and 181610 transitions. [2021-11-07 08:14:29,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:14:29,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 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 319 [2021-11-07 08:14:29,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:29,446 INFO L225 Difference]: With dead ends: 163376 [2021-11-07 08:14:29,446 INFO L226 Difference]: Without dead ends: 76297 [2021-11-07 08:14:29,482 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:14:29,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76297 states. [2021-11-07 08:14:30,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76297 to 60637. [2021-11-07 08:14:30,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60637 states, 60636 states have (on average 1.0921729665545221) internal successors, (66225), 60636 states have internal predecessors, (66225), 0 states have call successors, (0), 0 states 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 08:14:30,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60637 states to 60637 states and 66225 transitions. [2021-11-07 08:14:30,615 INFO L78 Accepts]: Start accepts. Automaton has 60637 states and 66225 transitions. Word has length 319 [2021-11-07 08:14:30,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:30,615 INFO L470 AbstractCegarLoop]: Abstraction has 60637 states and 66225 transitions. [2021-11-07 08:14:30,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states 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 08:14:30,615 INFO L276 IsEmpty]: Start isEmpty. Operand 60637 states and 66225 transitions. [2021-11-07 08:14:30,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2021-11-07 08:14:30,655 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:30,655 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:30,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 08:14:30,656 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:30,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:30,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1092561797, now seen corresponding path program 1 times [2021-11-07 08:14:30,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:30,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173584751] [2021-11-07 08:14:30,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:30,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:30,774 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 118 proven. 6 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-11-07 08:14:30,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:30,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173584751] [2021-11-07 08:14:30,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173584751] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:30,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278020545] [2021-11-07 08:14:30,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:30,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:30,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:30,778 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:30,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 08:14:31,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:31,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:14:31,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:32,236 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-07 08:14:32,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278020545] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:32,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:14:32,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-11-07 08:14:32,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943824042] [2021-11-07 08:14:32,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:14:32,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:32,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:14:32,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:14:32,238 INFO L87 Difference]: Start difference. First operand 60637 states and 66225 transitions. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 2 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 08:14:33,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:33,180 INFO L93 Difference]: Finished difference Result 119239 states and 130233 transitions. [2021-11-07 08:14:33,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:14:33,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 2 states have internal predecessors, (254), 0 states have call successors, (0), 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 333 [2021-11-07 08:14:33,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:33,235 INFO L225 Difference]: With dead ends: 119239 [2021-11-07 08:14:33,235 INFO L226 Difference]: Without dead ends: 60228 [2021-11-07 08:14:33,256 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:14:33,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60228 states. [2021-11-07 08:14:33,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60228 to 60227. [2021-11-07 08:14:33,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60227 states, 60226 states have (on average 1.0913392886793079) internal successors, (65727), 60226 states have internal predecessors, (65727), 0 states have call successors, (0), 0 states 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 08:14:34,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60227 states to 60227 states and 65727 transitions. [2021-11-07 08:14:34,218 INFO L78 Accepts]: Start accepts. Automaton has 60227 states and 65727 transitions. Word has length 333 [2021-11-07 08:14:34,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:34,218 INFO L470 AbstractCegarLoop]: Abstraction has 60227 states and 65727 transitions. [2021-11-07 08:14:34,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 2 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 08:14:34,219 INFO L276 IsEmpty]: Start isEmpty. Operand 60227 states and 65727 transitions. [2021-11-07 08:14:34,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2021-11-07 08:14:34,286 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:34,287 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:34,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:34,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 08:14:34,506 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:34,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:34,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1963074404, now seen corresponding path program 1 times [2021-11-07 08:14:34,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:34,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730109913] [2021-11-07 08:14:34,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:34,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:34,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:34,620 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 132 proven. 6 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-07 08:14:34,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:34,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730109913] [2021-11-07 08:14:34,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730109913] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:34,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774676656] [2021-11-07 08:14:34,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:34,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:34,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:34,638 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:34,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 08:14:35,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:35,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:14:35,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 260 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-07 08:14:36,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774676656] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:36,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:14:36,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-07 08:14:36,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977840009] [2021-11-07 08:14:36,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:14:36,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:36,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:14:36,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:14:36,097 INFO L87 Difference]: Start difference. First operand 60227 states and 65727 transitions. Second operand has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states 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 08:14:37,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:37,043 INFO L93 Difference]: Finished difference Result 106599 states and 116244 transitions. [2021-11-07 08:14:37,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:14:37,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 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 342 [2021-11-07 08:14:37,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:37,087 INFO L225 Difference]: With dead ends: 106599 [2021-11-07 08:14:37,087 INFO L226 Difference]: Without dead ends: 47998 [2021-11-07 08:14:37,109 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:14:37,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47998 states. [2021-11-07 08:14:37,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47998 to 44747. [2021-11-07 08:14:37,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44747 states, 44746 states have (on average 1.071090153309793) internal successors, (47927), 44746 states have internal predecessors, (47927), 0 states have call successors, (0), 0 states 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 08:14:37,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44747 states to 44747 states and 47927 transitions. [2021-11-07 08:14:37,912 INFO L78 Accepts]: Start accepts. Automaton has 44747 states and 47927 transitions. Word has length 342 [2021-11-07 08:14:37,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:37,913 INFO L470 AbstractCegarLoop]: Abstraction has 44747 states and 47927 transitions. [2021-11-07 08:14:37,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states 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 08:14:37,913 INFO L276 IsEmpty]: Start isEmpty. Operand 44747 states and 47927 transitions. [2021-11-07 08:14:37,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2021-11-07 08:14:37,944 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:37,945 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:37,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-07 08:14:38,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:38,146 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:38,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:38,146 INFO L85 PathProgramCache]: Analyzing trace with hash -264511008, now seen corresponding path program 1 times [2021-11-07 08:14:38,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:38,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172059907] [2021-11-07 08:14:38,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:38,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2021-11-07 08:14:38,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:38,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172059907] [2021-11-07 08:14:38,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172059907] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:38,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:38,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:14:38,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622582810] [2021-11-07 08:14:38,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:14:38,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:38,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:14:38,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:14:38,291 INFO L87 Difference]: Start difference. First operand 44747 states and 47927 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 0 states 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 08:14:39,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:39,125 INFO L93 Difference]: Finished difference Result 92753 states and 99267 transitions. [2021-11-07 08:14:39,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:14:39,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 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 370 [2021-11-07 08:14:39,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:39,186 INFO L225 Difference]: With dead ends: 92753 [2021-11-07 08:14:39,186 INFO L226 Difference]: Without dead ends: 49429 [2021-11-07 08:14:39,207 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 08:14:39,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49429 states. [2021-11-07 08:14:40,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49429 to 49426. [2021-11-07 08:14:40,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49426 states, 49425 states have (on average 1.0686090035407183) internal successors, (52816), 49425 states have internal predecessors, (52816), 0 states have call successors, (0), 0 states 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 08:14:40,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49426 states to 49426 states and 52816 transitions. [2021-11-07 08:14:40,147 INFO L78 Accepts]: Start accepts. Automaton has 49426 states and 52816 transitions. Word has length 370 [2021-11-07 08:14:40,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:40,147 INFO L470 AbstractCegarLoop]: Abstraction has 49426 states and 52816 transitions. [2021-11-07 08:14:40,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 0 states 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 08:14:40,148 INFO L276 IsEmpty]: Start isEmpty. Operand 49426 states and 52816 transitions. [2021-11-07 08:14:40,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2021-11-07 08:14:40,175 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:40,175 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:40,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 08:14:40,176 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:40,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:40,176 INFO L85 PathProgramCache]: Analyzing trace with hash 43010546, now seen corresponding path program 1 times [2021-11-07 08:14:40,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:40,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533025527] [2021-11-07 08:14:40,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:40,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:40,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:40,298 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 148 proven. 6 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2021-11-07 08:14:40,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:40,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533025527] [2021-11-07 08:14:40,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533025527] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:40,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618393307] [2021-11-07 08:14:40,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:40,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:40,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:40,302 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:40,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 08:14:41,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:41,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:14:41,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 207 proven. 113 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-07 08:14:42,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618393307] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:42,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:42,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-11-07 08:14:42,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654972292] [2021-11-07 08:14:42,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:14:42,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:42,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:14:42,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:14:42,057 INFO L87 Difference]: Start difference. First operand 49426 states and 52816 transitions. Second operand has 6 states, 6 states have (on average 59.333333333333336) internal successors, (356), 5 states have internal predecessors, (356), 0 states have call successors, (0), 0 states 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 08:14:45,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:45,651 INFO L93 Difference]: Finished difference Result 171656 states and 184041 transitions. [2021-11-07 08:14:45,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 08:14:45,651 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 59.333333333333336) internal successors, (356), 5 states have internal predecessors, (356), 0 states have call successors, (0), 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 382 [2021-11-07 08:14:45,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:45,773 INFO L225 Difference]: With dead ends: 171656 [2021-11-07 08:14:45,773 INFO L226 Difference]: Without dead ends: 126093 [2021-11-07 08:14:45,804 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:14:45,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126093 states. [2021-11-07 08:14:47,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126093 to 122403. [2021-11-07 08:14:47,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122403 states, 122402 states have (on average 1.0691573667096943) internal successors, (130867), 122402 states have internal predecessors, (130867), 0 states have call successors, (0), 0 states 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 08:14:48,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122403 states to 122403 states and 130867 transitions. [2021-11-07 08:14:48,026 INFO L78 Accepts]: Start accepts. Automaton has 122403 states and 130867 transitions. Word has length 382 [2021-11-07 08:14:48,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:48,027 INFO L470 AbstractCegarLoop]: Abstraction has 122403 states and 130867 transitions. [2021-11-07 08:14:48,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.333333333333336) internal successors, (356), 5 states have internal predecessors, (356), 0 states have call successors, (0), 0 states 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 08:14:48,027 INFO L276 IsEmpty]: Start isEmpty. Operand 122403 states and 130867 transitions. [2021-11-07 08:14:48,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2021-11-07 08:14:48,107 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:48,108 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:48,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:48,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26071464-fb02-4734-867d-d0a6864c5ce8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-07 08:14:48,319 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:48,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:48,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1555058709, now seen corresponding path program 1 times [2021-11-07 08:14:48,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:48,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557512671] [2021-11-07 08:14:48,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:48,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:48,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:48,544 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 300 proven. 0 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2021-11-07 08:14:48,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:48,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557512671] [2021-11-07 08:14:48,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557512671] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:48,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:48,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:14:48,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010998356] [2021-11-07 08:14:48,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:14:48,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:48,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:14:48,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:14:48,548 INFO L87 Difference]: Start difference. First operand 122403 states and 130867 transitions. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 2 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)