./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label44.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_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/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_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label44.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/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_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/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 37cccb3bf38aef2358990f5bb72c991902624e4b903b7b6aaef89921bb90a94d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:28:52,255 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:28:52,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:28:52,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:28:52,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:28:52,300 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:28:52,302 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:28:52,305 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:28:52,308 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:28:52,309 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:28:52,311 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:28:52,313 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:28:52,314 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:28:52,315 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:28:52,318 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:28:52,320 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:28:52,321 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:28:52,323 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:28:52,326 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:28:52,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:28:52,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:28:52,334 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:28:52,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:28:52,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:28:52,342 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:28:52,343 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:28:52,344 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:28:52,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:28:52,346 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:28:52,348 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:28:52,348 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:28:52,349 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:28:52,351 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:28:52,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:28:52,354 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:28:52,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:28:52,356 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:28:52,356 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:28:52,357 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:28:52,358 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:28:52,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:28:52,362 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:28:52,416 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:28:52,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:28:52,418 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:28:52,418 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:28:52,427 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:28:52,427 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:28:52,428 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:28:52,428 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:28:52,428 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:28:52,428 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:28:52,429 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:28:52,429 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:28:52,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:28:52,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:28:52,430 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:28:52,430 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:28:52,430 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:28:52,430 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:28:52,431 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:28:52,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:28:52,431 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:28:52,432 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:28:52,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:28:52,432 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:28:52,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:28:52,433 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:28:52,433 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:28:52,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:28:52,433 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:28:52,434 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:28:52,434 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:28:52,434 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:28:52,434 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_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37cccb3bf38aef2358990f5bb72c991902624e4b903b7b6aaef89921bb90a94d [2021-11-07 07:28:52,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:28:52,776 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:28:52,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:28:52,780 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:28:52,781 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:28:52,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/eca-rers2012/Problem03_label44.c [2021-11-07 07:28:52,885 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/data/fcf773b15/89b65dc2b78b4ad6bc6c29dd903487a4/FLAGb1010b428 [2021-11-07 07:28:53,769 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:28:53,770 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/sv-benchmarks/c/eca-rers2012/Problem03_label44.c [2021-11-07 07:28:53,792 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/data/fcf773b15/89b65dc2b78b4ad6bc6c29dd903487a4/FLAGb1010b428 [2021-11-07 07:28:53,885 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/data/fcf773b15/89b65dc2b78b4ad6bc6c29dd903487a4 [2021-11-07 07:28:53,890 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:28:53,892 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:28:53,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:28:53,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:28:53,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:28:53,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:28:53" (1/1) ... [2021-11-07 07:28:53,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@136d0e0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:53, skipping insertion in model container [2021-11-07 07:28:53,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:28:53" (1/1) ... [2021-11-07 07:28:53,940 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:28:54,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:28:54,954 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_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/sv-benchmarks/c/eca-rers2012/Problem03_label44.c[58121,58134] [2021-11-07 07:28:55,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:28:55,021 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:28:55,454 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_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/sv-benchmarks/c/eca-rers2012/Problem03_label44.c[58121,58134] [2021-11-07 07:28:55,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:28:55,493 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:28:55,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:55 WrapperNode [2021-11-07 07:28:55,494 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:28:55,497 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:28:55,497 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:28:55,497 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:28:55,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:55" (1/1) ... [2021-11-07 07:28:55,572 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:55" (1/1) ... [2021-11-07 07:28:55,685 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:28:55,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:28:55,687 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:28:55,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:28:55,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:55" (1/1) ... [2021-11-07 07:28:55,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:55" (1/1) ... [2021-11-07 07:28:55,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:55" (1/1) ... [2021-11-07 07:28:55,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:55" (1/1) ... [2021-11-07 07:28:55,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:55" (1/1) ... [2021-11-07 07:28:55,795 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:55" (1/1) ... [2021-11-07 07:28:55,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:55" (1/1) ... [2021-11-07 07:28:55,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:28:55,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:28:55,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:28:55,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:28:55,847 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:55" (1/1) ... [2021-11-07 07:28:55,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:28:55,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:28:55,896 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:28:55,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:28:55,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:28:55,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:28:55,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:28:55,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:28:58,390 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:28:58,392 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-07 07:28:58,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:28:58 BoogieIcfgContainer [2021-11-07 07:28:58,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:28:58,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:28:58,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:28:58,407 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:28:58,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:28:53" (1/3) ... [2021-11-07 07:28:58,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d8737c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:28:58, skipping insertion in model container [2021-11-07 07:28:58,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:55" (2/3) ... [2021-11-07 07:28:58,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d8737c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:28:58, skipping insertion in model container [2021-11-07 07:28:58,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:28:58" (3/3) ... [2021-11-07 07:28:58,412 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label44.c [2021-11-07 07:28:58,420 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:28:58,421 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 07:28:58,510 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:28:58,520 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 07:28:58,520 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 07:28:58,551 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 07:28:58,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-07 07:28:58,573 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:28:58,574 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, 1, 1, 1] [2021-11-07 07:28:58,575 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:28:58,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:28:58,583 INFO L85 PathProgramCache]: Analyzing trace with hash 302925243, now seen corresponding path program 1 times [2021-11-07 07:28:58,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:28:58,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945615612] [2021-11-07 07:28:58,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:28:58,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:28:59,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:28:59,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:28:59,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:28:59,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945615612] [2021-11-07 07:28:59,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945615612] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:28:59,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:28:59,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:28:59,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133081736] [2021-11-07 07:28:59,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:28:59,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:28:59,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:28:59,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:28:59,659 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 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:01,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:29:01,289 INFO L93 Difference]: Finished difference Result 855 states and 1496 transitions. [2021-11-07 07:29:01,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:29:01,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-11-07 07:29:01,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:29:01,330 INFO L225 Difference]: With dead ends: 855 [2021-11-07 07:29:01,330 INFO L226 Difference]: Without dead ends: 460 [2021-11-07 07:29:01,336 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 07:29:01,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-07 07:29:01,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 459. [2021-11-07 07:29:01,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 1.5502183406113537) internal successors, (710), 458 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:01,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 710 transitions. [2021-11-07 07:29:01,441 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 710 transitions. Word has length 177 [2021-11-07 07:29:01,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:29:01,443 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 710 transitions. [2021-11-07 07:29:01,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:01,444 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 710 transitions. [2021-11-07 07:29:01,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-07 07:29:01,452 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:29:01,453 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, 1, 1, 1] [2021-11-07 07:29:01,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:29:01,454 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:29:01,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:29:01,455 INFO L85 PathProgramCache]: Analyzing trace with hash -2005485845, now seen corresponding path program 1 times [2021-11-07 07:29:01,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:29:01,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955778000] [2021-11-07 07:29:01,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:01,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:29:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:01,702 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 07:29:01,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:29:01,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955778000] [2021-11-07 07:29:01,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955778000] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:29:01,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:29:01,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:29:01,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389165107] [2021-11-07 07:29:01,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:29:01,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:29:01,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:29:01,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:29:01,708 INFO L87 Difference]: Start difference. First operand 459 states and 710 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 07:29:02,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:29:02,951 INFO L93 Difference]: Finished difference Result 1342 states and 2082 transitions. [2021-11-07 07:29:02,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:29:02,952 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 07:29:02,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:29:02,968 INFO L225 Difference]: With dead ends: 1342 [2021-11-07 07:29:02,968 INFO L226 Difference]: Without dead ends: 885 [2021-11-07 07:29:02,973 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 07:29:02,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2021-11-07 07:29:03,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 880. [2021-11-07 07:29:03,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 1.4687144482366326) internal successors, (1291), 879 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:03,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1291 transitions. [2021-11-07 07:29:03,058 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1291 transitions. Word has length 182 [2021-11-07 07:29:03,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:29:03,058 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 1291 transitions. [2021-11-07 07:29:03,059 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 07:29:03,059 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1291 transitions. [2021-11-07 07:29:03,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-07 07:29:03,071 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:29:03,071 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, 1, 1, 1] [2021-11-07 07:29:03,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 07:29:03,072 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:29:03,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:29:03,073 INFO L85 PathProgramCache]: Analyzing trace with hash -23446020, now seen corresponding path program 1 times [2021-11-07 07:29:03,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:29:03,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699438005] [2021-11-07 07:29:03,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:03,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:29:03,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:03,254 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 07:29:03,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:29:03,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699438005] [2021-11-07 07:29:03,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699438005] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:29:03,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:29:03,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:29:03,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847757569] [2021-11-07 07:29:03,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:29:03,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:29:03,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:29:03,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:29:03,270 INFO L87 Difference]: Start difference. First operand 880 states and 1291 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:04,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:29:04,412 INFO L93 Difference]: Finished difference Result 2594 states and 3822 transitions. [2021-11-07 07:29:04,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:29:04,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-11-07 07:29:04,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:29:04,427 INFO L225 Difference]: With dead ends: 2594 [2021-11-07 07:29:04,428 INFO L226 Difference]: Without dead ends: 1716 [2021-11-07 07:29:04,432 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 07:29:04,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-11-07 07:29:04,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1696. [2021-11-07 07:29:04,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1695 states have (on average 1.4395280235988202) internal successors, (2440), 1695 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:04,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 2440 transitions. [2021-11-07 07:29:04,507 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 2440 transitions. Word has length 185 [2021-11-07 07:29:04,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:29:04,508 INFO L470 AbstractCegarLoop]: Abstraction has 1696 states and 2440 transitions. [2021-11-07 07:29:04,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:04,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 2440 transitions. [2021-11-07 07:29:04,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-07 07:29:04,518 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:29:04,519 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, 1, 1, 1] [2021-11-07 07:29:04,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 07:29:04,520 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:29:04,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:29:04,521 INFO L85 PathProgramCache]: Analyzing trace with hash 372513201, now seen corresponding path program 1 times [2021-11-07 07:29:04,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:29:04,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447295578] [2021-11-07 07:29:04,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:04,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:29:04,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:04,925 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 07:29:04,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:29:04,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447295578] [2021-11-07 07:29:04,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447295578] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:29:04,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:29:04,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:29:04,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370904377] [2021-11-07 07:29:04,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:29:04,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:29:04,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:29:04,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:29:04,930 INFO L87 Difference]: Start difference. First operand 1696 states and 2440 transitions. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:06,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:29:06,250 INFO L93 Difference]: Finished difference Result 3531 states and 5130 transitions. [2021-11-07 07:29:06,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:29:06,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2021-11-07 07:29:06,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:29:06,263 INFO L225 Difference]: With dead ends: 3531 [2021-11-07 07:29:06,263 INFO L226 Difference]: Without dead ends: 1663 [2021-11-07 07:29:06,266 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 07:29:06,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2021-11-07 07:29:06,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1663. [2021-11-07 07:29:06,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 1.325511432009627) internal successors, (2203), 1662 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:06,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 2203 transitions. [2021-11-07 07:29:06,317 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 2203 transitions. Word has length 192 [2021-11-07 07:29:06,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:29:06,317 INFO L470 AbstractCegarLoop]: Abstraction has 1663 states and 2203 transitions. [2021-11-07 07:29:06,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:06,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 2203 transitions. [2021-11-07 07:29:06,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-07 07:29:06,323 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:29:06,324 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:29:06,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 07:29:06,325 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:29:06,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:29:06,325 INFO L85 PathProgramCache]: Analyzing trace with hash 146400972, now seen corresponding path program 1 times [2021-11-07 07:29:06,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:29:06,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988700556] [2021-11-07 07:29:06,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:06,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:29:06,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:06,717 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 07:29:06,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:29:06,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988700556] [2021-11-07 07:29:06,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988700556] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:29:06,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:29:06,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:29:06,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143452521] [2021-11-07 07:29:06,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:29:06,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:29:06,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:29:06,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:29:06,722 INFO L87 Difference]: Start difference. First operand 1663 states and 2203 transitions. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:08,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:29:08,315 INFO L93 Difference]: Finished difference Result 4323 states and 5743 transitions. [2021-11-07 07:29:08,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:29:08,316 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 208 [2021-11-07 07:29:08,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:29:08,334 INFO L225 Difference]: With dead ends: 4323 [2021-11-07 07:29:08,335 INFO L226 Difference]: Without dead ends: 2488 [2021-11-07 07:29:08,338 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 07:29:08,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2021-11-07 07:29:08,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 2487. [2021-11-07 07:29:08,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 1.3085277554304102) internal successors, (3253), 2486 states have internal predecessors, (3253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:08,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 3253 transitions. [2021-11-07 07:29:08,424 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 3253 transitions. Word has length 208 [2021-11-07 07:29:08,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:29:08,424 INFO L470 AbstractCegarLoop]: Abstraction has 2487 states and 3253 transitions. [2021-11-07 07:29:08,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:08,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 3253 transitions. [2021-11-07 07:29:08,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-07 07:29:08,434 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:29:08,434 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:29:08,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 07:29:08,435 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:29:08,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:29:08,436 INFO L85 PathProgramCache]: Analyzing trace with hash -459963951, now seen corresponding path program 1 times [2021-11-07 07:29:08,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:29:08,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253824961] [2021-11-07 07:29:08,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:08,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:29:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:08,589 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 07:29:08,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:29:08,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253824961] [2021-11-07 07:29:08,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253824961] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:29:08,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:29:08,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:29:08,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349469006] [2021-11-07 07:29:08,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:29:08,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:29:08,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:29:08,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:29:08,598 INFO L87 Difference]: Start difference. First operand 2487 states and 3253 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:09,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:29:09,663 INFO L93 Difference]: Finished difference Result 6628 states and 8644 transitions. [2021-11-07 07:29:09,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:29:09,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 210 [2021-11-07 07:29:09,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:29:09,694 INFO L225 Difference]: With dead ends: 6628 [2021-11-07 07:29:09,694 INFO L226 Difference]: Without dead ends: 4143 [2021-11-07 07:29:09,699 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 07:29:09,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2021-11-07 07:29:09,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 4140. [2021-11-07 07:29:09,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4140 states, 4139 states have (on average 1.2974148345010872) internal successors, (5370), 4139 states have internal predecessors, (5370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:09,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4140 states to 4140 states and 5370 transitions. [2021-11-07 07:29:09,839 INFO L78 Accepts]: Start accepts. Automaton has 4140 states and 5370 transitions. Word has length 210 [2021-11-07 07:29:09,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:29:09,840 INFO L470 AbstractCegarLoop]: Abstraction has 4140 states and 5370 transitions. [2021-11-07 07:29:09,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:09,841 INFO L276 IsEmpty]: Start isEmpty. Operand 4140 states and 5370 transitions. [2021-11-07 07:29:09,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-07 07:29:09,852 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:29:09,853 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:29:09,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 07:29:09,854 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:29:09,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:29:09,854 INFO L85 PathProgramCache]: Analyzing trace with hash -145510537, now seen corresponding path program 1 times [2021-11-07 07:29:09,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:29:09,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839211958] [2021-11-07 07:29:09,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:09,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:29:09,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:10,016 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:29:10,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:29:10,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839211958] [2021-11-07 07:29:10,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839211958] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:29:10,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051689823] [2021-11-07 07:29:10,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:10,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:29:10,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:29:10,021 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:29:10,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:29:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:10,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 07:29:10,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:29:11,290 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-07 07:29:11,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051689823] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:29:11,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:29:11,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-07 07:29:11,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023111939] [2021-11-07 07:29:11,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:29:11,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:29:11,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:29:11,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:29:11,294 INFO L87 Difference]: Start difference. First operand 4140 states and 5370 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:12,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:29:12,430 INFO L93 Difference]: Finished difference Result 8287 states and 10754 transitions. [2021-11-07 07:29:12,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:29:12,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 215 [2021-11-07 07:29:12,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:29:12,461 INFO L225 Difference]: With dead ends: 8287 [2021-11-07 07:29:12,461 INFO L226 Difference]: Without dead ends: 4149 [2021-11-07 07:29:12,467 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 214 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 07:29:12,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4149 states. [2021-11-07 07:29:12,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4149 to 4140. [2021-11-07 07:29:12,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4140 states, 4139 states have (on average 1.2867842474027542) internal successors, (5326), 4139 states have internal predecessors, (5326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:12,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4140 states to 4140 states and 5326 transitions. [2021-11-07 07:29:12,662 INFO L78 Accepts]: Start accepts. Automaton has 4140 states and 5326 transitions. Word has length 215 [2021-11-07 07:29:12,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:29:12,663 INFO L470 AbstractCegarLoop]: Abstraction has 4140 states and 5326 transitions. [2021-11-07 07:29:12,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:12,663 INFO L276 IsEmpty]: Start isEmpty. Operand 4140 states and 5326 transitions. [2021-11-07 07:29:12,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-07 07:29:12,675 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:29:12,675 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:29:12,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:29:12,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-07 07:29:12,889 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:29:12,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:29:12,889 INFO L85 PathProgramCache]: Analyzing trace with hash -348387949, now seen corresponding path program 1 times [2021-11-07 07:29:12,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:29:12,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285064506] [2021-11-07 07:29:12,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:12,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:29:12,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 07:29:13,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:29:13,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285064506] [2021-11-07 07:29:13,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285064506] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:29:13,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35286823] [2021-11-07 07:29:13,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:13,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:29:13,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:29:13,024 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:29:13,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 07:29:13,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:13,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 07:29:13,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:29:13,935 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 07:29:13,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35286823] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:29:13,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:29:13,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-07 07:29:13,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790822573] [2021-11-07 07:29:13,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:29:13,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:29:13,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:29:13,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:29:13,939 INFO L87 Difference]: Start difference. First operand 4140 states and 5326 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 07:29:14,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:29:14,928 INFO L93 Difference]: Finished difference Result 12344 states and 15880 transitions. [2021-11-07 07:29:14,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:29:14,928 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 221 [2021-11-07 07:29:14,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:29:14,974 INFO L225 Difference]: With dead ends: 12344 [2021-11-07 07:29:14,974 INFO L226 Difference]: Without dead ends: 8206 [2021-11-07 07:29:14,980 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 220 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 07:29:14,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8206 states. [2021-11-07 07:29:15,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8206 to 8200. [2021-11-07 07:29:15,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8200 states, 8199 states have (on average 1.17685083546774) internal successors, (9649), 8199 states have internal predecessors, (9649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:15,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8200 states to 8200 states and 9649 transitions. [2021-11-07 07:29:15,195 INFO L78 Accepts]: Start accepts. Automaton has 8200 states and 9649 transitions. Word has length 221 [2021-11-07 07:29:15,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:29:15,196 INFO L470 AbstractCegarLoop]: Abstraction has 8200 states and 9649 transitions. [2021-11-07 07:29:15,199 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 07:29:15,200 INFO L276 IsEmpty]: Start isEmpty. Operand 8200 states and 9649 transitions. [2021-11-07 07:29:15,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-07 07:29:15,223 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:29:15,223 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:29:15,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:29:15,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:29:15,437 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:29:15,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:29:15,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1029715779, now seen corresponding path program 1 times [2021-11-07 07:29:15,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:29:15,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365628084] [2021-11-07 07:29:15,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:15,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:29:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:15,527 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:29:15,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:29:15,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365628084] [2021-11-07 07:29:15,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365628084] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:29:15,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:29:15,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:29:15,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132290027] [2021-11-07 07:29:15,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:29:15,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:29:15,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:29:15,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:29:15,531 INFO L87 Difference]: Start difference. First operand 8200 states and 9649 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:16,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:29:16,654 INFO L93 Difference]: Finished difference Result 20464 states and 24526 transitions. [2021-11-07 07:29:16,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:29:16,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 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 221 [2021-11-07 07:29:16,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:29:16,707 INFO L225 Difference]: With dead ends: 20464 [2021-11-07 07:29:16,707 INFO L226 Difference]: Without dead ends: 12266 [2021-11-07 07:29:16,720 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 07:29:16,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12266 states. [2021-11-07 07:29:16,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12266 to 12260. [2021-11-07 07:29:16,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12260 states, 12259 states have (on average 1.149196508687495) internal successors, (14088), 12259 states have internal predecessors, (14088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:16,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12260 states to 12260 states and 14088 transitions. [2021-11-07 07:29:16,994 INFO L78 Accepts]: Start accepts. Automaton has 12260 states and 14088 transitions. Word has length 221 [2021-11-07 07:29:16,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:29:16,995 INFO L470 AbstractCegarLoop]: Abstraction has 12260 states and 14088 transitions. [2021-11-07 07:29:16,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:16,995 INFO L276 IsEmpty]: Start isEmpty. Operand 12260 states and 14088 transitions. [2021-11-07 07:29:17,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-07 07:29:17,020 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:29:17,021 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:29:17,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 07:29:17,021 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:29:17,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:29:17,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1383255126, now seen corresponding path program 1 times [2021-11-07 07:29:17,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:29:17,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953894758] [2021-11-07 07:29:17,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:17,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:29:17,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:17,168 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:29:17,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:29:17,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953894758] [2021-11-07 07:29:17,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953894758] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:29:17,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:29:17,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:29:17,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282333574] [2021-11-07 07:29:17,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:29:17,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:29:17,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:29:17,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:29:17,172 INFO L87 Difference]: Start difference. First operand 12260 states and 14088 transitions. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 2 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:18,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:29:18,352 INFO L93 Difference]: Finished difference Result 35312 states and 40582 transitions. [2021-11-07 07:29:18,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:29:18,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 2 states have internal predecessors, (252), 0 states have call successors, (0), 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 252 [2021-11-07 07:29:18,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:29:18,406 INFO L225 Difference]: With dead ends: 35312 [2021-11-07 07:29:18,407 INFO L226 Difference]: Without dead ends: 23054 [2021-11-07 07:29:18,429 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 07:29:18,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23054 states. [2021-11-07 07:29:18,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23054 to 18965. [2021-11-07 07:29:18,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18965 states, 18964 states have (on average 1.1624657245306897) internal successors, (22045), 18964 states have internal predecessors, (22045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:19,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18965 states to 18965 states and 22045 transitions. [2021-11-07 07:29:19,044 INFO L78 Accepts]: Start accepts. Automaton has 18965 states and 22045 transitions. Word has length 252 [2021-11-07 07:29:19,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:29:19,045 INFO L470 AbstractCegarLoop]: Abstraction has 18965 states and 22045 transitions. [2021-11-07 07:29:19,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 2 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:19,046 INFO L276 IsEmpty]: Start isEmpty. Operand 18965 states and 22045 transitions. [2021-11-07 07:29:19,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-11-07 07:29:19,085 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:29:19,086 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:29:19,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 07:29:19,087 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:29:19,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:29:19,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1001653614, now seen corresponding path program 1 times [2021-11-07 07:29:19,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:29:19,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339597033] [2021-11-07 07:29:19,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:19,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:29:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:19,570 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 77 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:29:19,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:29:19,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339597033] [2021-11-07 07:29:19,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339597033] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:29:19,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918600526] [2021-11-07 07:29:19,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:19,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:29:19,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:29:19,575 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:29:19,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 07:29:19,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:19,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 07:29:19,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:29:21,013 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 07:29:21,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918600526] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:29:21,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:29:21,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-07 07:29:21,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065520599] [2021-11-07 07:29:21,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:29:21,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:29:21,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:29:21,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:29:21,017 INFO L87 Difference]: Start difference. First operand 18965 states and 22045 transitions. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:22,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:29:22,128 INFO L93 Difference]: Finished difference Result 37934 states and 44098 transitions. [2021-11-07 07:29:22,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:29:22,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 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 257 [2021-11-07 07:29:22,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:29:22,174 INFO L225 Difference]: With dead ends: 37934 [2021-11-07 07:29:22,174 INFO L226 Difference]: Without dead ends: 18971 [2021-11-07 07:29:22,202 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:29:22,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18971 states. [2021-11-07 07:29:22,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18971 to 18559. [2021-11-07 07:29:22,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18559 states, 18558 states have (on average 1.1509860976398318) internal successors, (21360), 18558 states have internal predecessors, (21360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:22,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18559 states to 18559 states and 21360 transitions. [2021-11-07 07:29:22,606 INFO L78 Accepts]: Start accepts. Automaton has 18559 states and 21360 transitions. Word has length 257 [2021-11-07 07:29:22,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:29:22,607 INFO L470 AbstractCegarLoop]: Abstraction has 18559 states and 21360 transitions. [2021-11-07 07:29:22,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:22,607 INFO L276 IsEmpty]: Start isEmpty. Operand 18559 states and 21360 transitions. [2021-11-07 07:29:22,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-07 07:29:22,646 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:29:22,647 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:29:22,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-07 07:29:22,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:29:22,950 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:29:22,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:29:22,951 INFO L85 PathProgramCache]: Analyzing trace with hash -193073376, now seen corresponding path program 1 times [2021-11-07 07:29:22,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:29:22,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634183198] [2021-11-07 07:29:22,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:22,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:29:23,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:23,089 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 87 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-07 07:29:23,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:29:23,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634183198] [2021-11-07 07:29:23,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634183198] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:29:23,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41592704] [2021-11-07 07:29:23,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:23,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:29:23,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:29:23,092 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:29:23,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 07:29:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:23,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:29:23,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:29:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 07:29:24,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41592704] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:29:24,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:29:24,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-07 07:29:24,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665873895] [2021-11-07 07:29:24,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:29:24,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:29:24,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:29:24,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:29:24,392 INFO L87 Difference]: Start difference. First operand 18559 states and 21360 transitions. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 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 07:29:25,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:29:25,647 INFO L93 Difference]: Finished difference Result 48714 states and 56204 transitions. [2021-11-07 07:29:25,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:29:25,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 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 259 [2021-11-07 07:29:25,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:29:25,709 INFO L225 Difference]: With dead ends: 48714 [2021-11-07 07:29:25,709 INFO L226 Difference]: Without dead ends: 30157 [2021-11-07 07:29:25,730 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 258 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 07:29:25,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30157 states. [2021-11-07 07:29:26,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30157 to 30148. [2021-11-07 07:29:26,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30148 states, 30147 states have (on average 1.1390188078415764) internal successors, (34338), 30147 states have internal predecessors, (34338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:26,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30148 states to 30148 states and 34338 transitions. [2021-11-07 07:29:26,370 INFO L78 Accepts]: Start accepts. Automaton has 30148 states and 34338 transitions. Word has length 259 [2021-11-07 07:29:26,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:29:26,370 INFO L470 AbstractCegarLoop]: Abstraction has 30148 states and 34338 transitions. [2021-11-07 07:29:26,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 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 07:29:26,371 INFO L276 IsEmpty]: Start isEmpty. Operand 30148 states and 34338 transitions. [2021-11-07 07:29:26,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-11-07 07:29:26,661 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:29:26,663 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 07:29:26,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 07:29:26,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-07 07:29:26,885 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:29:26,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:29:26,886 INFO L85 PathProgramCache]: Analyzing trace with hash -830066769, now seen corresponding path program 1 times [2021-11-07 07:29:26,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:29:26,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887842012] [2021-11-07 07:29:26,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:26,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:29:27,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:27,229 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 161 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:29:27,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:29:27,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887842012] [2021-11-07 07:29:27,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887842012] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:29:27,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998935762] [2021-11-07 07:29:27,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:27,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:29:27,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:29:27,232 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:29:27,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 07:29:27,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:27,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:29:27,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:29:28,670 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 07:29:28,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998935762] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:29:28,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:29:28,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-07 07:29:28,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488349713] [2021-11-07 07:29:28,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:29:28,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:29:28,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:29:28,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:29:28,673 INFO L87 Difference]: Start difference. First operand 30148 states and 34338 transitions. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:29,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:29:29,744 INFO L93 Difference]: Finished difference Result 57629 states and 65479 transitions. [2021-11-07 07:29:29,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:29:29,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 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 299 [2021-11-07 07:29:29,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:29:29,802 INFO L225 Difference]: With dead ends: 57629 [2021-11-07 07:29:29,803 INFO L226 Difference]: Without dead ends: 27483 [2021-11-07 07:29:29,821 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 298 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 07:29:29,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27483 states. [2021-11-07 07:29:30,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27483 to 27480. [2021-11-07 07:29:30,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27480 states, 27479 states have (on average 1.108773972851996) internal successors, (30468), 27479 states have internal predecessors, (30468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:30,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27480 states to 27480 states and 30468 transitions. [2021-11-07 07:29:30,554 INFO L78 Accepts]: Start accepts. Automaton has 27480 states and 30468 transitions. Word has length 299 [2021-11-07 07:29:30,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:29:30,557 INFO L470 AbstractCegarLoop]: Abstraction has 27480 states and 30468 transitions. [2021-11-07 07:29:30,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:30,558 INFO L276 IsEmpty]: Start isEmpty. Operand 27480 states and 30468 transitions. [2021-11-07 07:29:30,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-11-07 07:29:30,752 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:29:30,753 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 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 07:29:30,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 07:29:30,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-07 07:29:30,954 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:29:30,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:29:30,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1313799382, now seen corresponding path program 1 times [2021-11-07 07:29:30,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:29:30,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117259657] [2021-11-07 07:29:30,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:30,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:29:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:31,161 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-07 07:29:31,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:29:31,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117259657] [2021-11-07 07:29:31,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117259657] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:29:31,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:29:31,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:29:31,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818053245] [2021-11-07 07:29:31,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:29:31,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:29:31,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:29:31,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:29:31,166 INFO L87 Difference]: Start difference. First operand 27480 states and 30468 transitions. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:32,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:29:32,335 INFO L93 Difference]: Finished difference Result 54552 states and 60479 transitions. [2021-11-07 07:29:32,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:29:32,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 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 314 [2021-11-07 07:29:32,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:29:32,384 INFO L225 Difference]: With dead ends: 54552 [2021-11-07 07:29:32,385 INFO L226 Difference]: Without dead ends: 27074 [2021-11-07 07:29:32,404 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 07:29:32,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27074 states. [2021-11-07 07:29:32,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27074 to 22603. [2021-11-07 07:29:32,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22603 states, 22602 states have (on average 1.0871161844084594) internal successors, (24571), 22602 states have internal predecessors, (24571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:33,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22603 states to 22603 states and 24571 transitions. [2021-11-07 07:29:33,106 INFO L78 Accepts]: Start accepts. Automaton has 22603 states and 24571 transitions. Word has length 314 [2021-11-07 07:29:33,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:29:33,108 INFO L470 AbstractCegarLoop]: Abstraction has 22603 states and 24571 transitions. [2021-11-07 07:29:33,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:33,109 INFO L276 IsEmpty]: Start isEmpty. Operand 22603 states and 24571 transitions. [2021-11-07 07:29:33,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-11-07 07:29:33,141 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:29:33,142 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 07:29:33,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 07:29:33,143 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:29:33,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:29:33,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1418421577, now seen corresponding path program 1 times [2021-11-07 07:29:33,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:29:33,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395129352] [2021-11-07 07:29:33,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:33,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:29:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:33,513 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 142 proven. 6 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-07 07:29:33,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:29:33,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395129352] [2021-11-07 07:29:33,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395129352] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:29:33,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937517197] [2021-11-07 07:29:33,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:33,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:29:33,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:29:33,516 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:29:33,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 07:29:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:34,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:29:34,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:29:35,283 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-07 07:29:35,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937517197] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:29:35,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:29:35,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-07 07:29:35,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2577588] [2021-11-07 07:29:35,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:29:35,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:29:35,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:29:35,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:29:35,286 INFO L87 Difference]: Start difference. First operand 22603 states and 24571 transitions. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:36,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:29:36,308 INFO L93 Difference]: Finished difference Result 52327 states and 56849 transitions. [2021-11-07 07:29:36,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:29:36,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 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 316 [2021-11-07 07:29:36,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:29:36,352 INFO L225 Difference]: With dead ends: 52327 [2021-11-07 07:29:36,352 INFO L226 Difference]: Without dead ends: 29726 [2021-11-07 07:29:36,364 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:29:36,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29726 states. [2021-11-07 07:29:36,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29726 to 26661. [2021-11-07 07:29:36,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26661 states, 26660 states have (on average 1.0861590397599399) internal successors, (28957), 26660 states have internal predecessors, (28957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:36,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26661 states to 26661 states and 28957 transitions. [2021-11-07 07:29:36,917 INFO L78 Accepts]: Start accepts. Automaton has 26661 states and 28957 transitions. Word has length 316 [2021-11-07 07:29:36,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:29:36,918 INFO L470 AbstractCegarLoop]: Abstraction has 26661 states and 28957 transitions. [2021-11-07 07:29:36,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:36,918 INFO L276 IsEmpty]: Start isEmpty. Operand 26661 states and 28957 transitions. [2021-11-07 07:29:36,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2021-11-07 07:29:36,946 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:29:36,947 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 07:29:36,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 07:29:37,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 07:29:37,161 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:29:37,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:29:37,161 INFO L85 PathProgramCache]: Analyzing trace with hash -623254272, now seen corresponding path program 1 times [2021-11-07 07:29:37,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:29:37,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885715233] [2021-11-07 07:29:37,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:37,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:29:37,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:37,304 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 94 proven. 6 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-07 07:29:37,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:29:37,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885715233] [2021-11-07 07:29:37,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885715233] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:29:37,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550945521] [2021-11-07 07:29:37,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:37,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:29:37,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:29:37,306 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:29:37,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 07:29:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:38,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:29:38,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:29:39,324 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-07 07:29:39,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550945521] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:29:39,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:29:39,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-07 07:29:39,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064431050] [2021-11-07 07:29:39,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:29:39,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:29:39,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:29:39,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:29:39,326 INFO L87 Difference]: Start difference. First operand 26661 states and 28957 transitions. Second operand has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:40,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:29:40,571 INFO L93 Difference]: Finished difference Result 54340 states and 58968 transitions. [2021-11-07 07:29:40,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:29:40,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 333 [2021-11-07 07:29:40,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:29:40,603 INFO L225 Difference]: With dead ends: 54340 [2021-11-07 07:29:40,603 INFO L226 Difference]: Without dead ends: 27681 [2021-11-07 07:29:40,621 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:29:40,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27681 states. [2021-11-07 07:29:41,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27681 to 27067. [2021-11-07 07:29:41,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27067 states, 27066 states have (on average 1.081836991058893) internal successors, (29281), 27066 states have internal predecessors, (29281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:41,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27067 states to 27067 states and 29281 transitions. [2021-11-07 07:29:41,084 INFO L78 Accepts]: Start accepts. Automaton has 27067 states and 29281 transitions. Word has length 333 [2021-11-07 07:29:41,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:29:41,085 INFO L470 AbstractCegarLoop]: Abstraction has 27067 states and 29281 transitions. [2021-11-07 07:29:41,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:41,085 INFO L276 IsEmpty]: Start isEmpty. Operand 27067 states and 29281 transitions. [2021-11-07 07:29:41,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-11-07 07:29:41,104 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:29:41,104 INFO L513 BasicCegarLoop]: trace histogram [5, 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, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 07:29:41,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-07 07:29:41,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:29:41,321 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:29:41,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:29:41,321 INFO L85 PathProgramCache]: Analyzing trace with hash 738662, now seen corresponding path program 1 times [2021-11-07 07:29:41,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:29:41,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058726131] [2021-11-07 07:29:41,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:41,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:29:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 102 proven. 6 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-07 07:29:41,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:29:41,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058726131] [2021-11-07 07:29:41,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058726131] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:29:41,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962684294] [2021-11-07 07:29:41,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:41,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:29:41,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:29:41,480 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:29:41,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 07:29:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:42,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 07:29:42,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:29:43,552 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-07 07:29:43,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962684294] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:29:43,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:29:43,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-07 07:29:43,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447518155] [2021-11-07 07:29:43,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:29:43,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:29:43,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:29:43,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:29:43,556 INFO L87 Difference]: Start difference. First operand 27067 states and 29281 transitions. Second operand has 4 states, 4 states have (on average 53.5) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:44,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:29:44,692 INFO L93 Difference]: Finished difference Result 74259 states and 80254 transitions. [2021-11-07 07:29:44,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:29:44,693 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.5) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 361 [2021-11-07 07:29:44,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:29:44,746 INFO L225 Difference]: With dead ends: 74259 [2021-11-07 07:29:44,746 INFO L226 Difference]: Without dead ends: 47194 [2021-11-07 07:29:44,766 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:29:44,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47194 states. [2021-11-07 07:29:45,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47194 to 44752. [2021-11-07 07:29:45,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44752 states, 44751 states have (on average 1.0811378516681192) internal successors, (48382), 44751 states have internal predecessors, (48382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:45,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44752 states to 44752 states and 48382 transitions. [2021-11-07 07:29:45,615 INFO L78 Accepts]: Start accepts. Automaton has 44752 states and 48382 transitions. Word has length 361 [2021-11-07 07:29:45,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:29:45,616 INFO L470 AbstractCegarLoop]: Abstraction has 44752 states and 48382 transitions. [2021-11-07 07:29:45,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.5) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:45,616 INFO L276 IsEmpty]: Start isEmpty. Operand 44752 states and 48382 transitions. [2021-11-07 07:29:45,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2021-11-07 07:29:45,649 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:29:45,649 INFO L513 BasicCegarLoop]: trace histogram [5, 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, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 07:29:45,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-07 07:29:45,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:29:45,865 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:29:45,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:29:45,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1903494745, now seen corresponding path program 1 times [2021-11-07 07:29:45,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:29:45,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165271767] [2021-11-07 07:29:45,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:45,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:29:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:46,013 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-07 07:29:46,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:29:46,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165271767] [2021-11-07 07:29:46,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165271767] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:29:46,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517472430] [2021-11-07 07:29:46,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:46,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:29:46,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:29:46,016 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:29:46,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 07:29:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:46,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 07:29:46,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:29:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-07 07:29:49,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517472430] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:29:49,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:29:49,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2021-11-07 07:29:49,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597430728] [2021-11-07 07:29:49,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:29:49,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:29:49,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:29:49,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:29:49,915 INFO L87 Difference]: Start difference. First operand 44752 states and 48382 transitions. Second operand has 5 states, 5 states have (on average 43.4) internal successors, (217), 4 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 07:29:51,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:29:51,967 INFO L93 Difference]: Finished difference Result 93034 states and 100409 transitions. [2021-11-07 07:29:51,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:29:51,967 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.4) internal successors, (217), 4 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 364 [2021-11-07 07:29:51,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:29:52,015 INFO L225 Difference]: With dead ends: 93034 [2021-11-07 07:29:52,015 INFO L226 Difference]: Without dead ends: 48284 [2021-11-07 07:29:52,029 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:29:52,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48284 states. [2021-11-07 07:29:52,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48284 to 47594. [2021-11-07 07:29:52,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47594 states, 47593 states have (on average 1.078372869959868) internal successors, (51323), 47593 states have internal predecessors, (51323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:52,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47594 states to 47594 states and 51323 transitions. [2021-11-07 07:29:52,822 INFO L78 Accepts]: Start accepts. Automaton has 47594 states and 51323 transitions. Word has length 364 [2021-11-07 07:29:52,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:29:52,823 INFO L470 AbstractCegarLoop]: Abstraction has 47594 states and 51323 transitions. [2021-11-07 07:29:52,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.4) internal successors, (217), 4 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 07:29:52,823 INFO L276 IsEmpty]: Start isEmpty. Operand 47594 states and 51323 transitions. [2021-11-07 07:29:52,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2021-11-07 07:29:52,848 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:29:52,849 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 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, 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] [2021-11-07 07:29:52,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-07 07:29:53,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:29:53,051 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:29:53,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:29:53,052 INFO L85 PathProgramCache]: Analyzing trace with hash 296271038, now seen corresponding path program 1 times [2021-11-07 07:29:53,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:29:53,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743166784] [2021-11-07 07:29:53,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:53,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:29:53,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:53,537 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 221 proven. 58 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-07 07:29:53,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:29:53,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743166784] [2021-11-07 07:29:53,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743166784] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:29:53,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044301979] [2021-11-07 07:29:53,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:53,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:29:53,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:29:53,544 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:29:53,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 07:29:54,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:54,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 07:29:54,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:29:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 279 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-07 07:29:56,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044301979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:29:56,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:29:56,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-11-07 07:29:56,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922952768] [2021-11-07 07:29:56,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:29:56,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:29:56,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:29:56,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:29:56,123 INFO L87 Difference]: Start difference. First operand 47594 states and 51323 transitions. Second operand has 4 states, 4 states have (on average 83.25) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:57,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:29:57,716 INFO L93 Difference]: Finished difference Result 98462 states and 106234 transitions. [2021-11-07 07:29:57,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:29:57,717 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 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 366 [2021-11-07 07:29:57,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:29:57,784 INFO L225 Difference]: With dead ends: 98462 [2021-11-07 07:29:57,784 INFO L226 Difference]: Without dead ends: 53509 [2021-11-07 07:29:57,812 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:29:57,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53509 states. [2021-11-07 07:29:58,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53509 to 53481. [2021-11-07 07:29:58,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53481 states, 53480 states have (on average 1.0642670157068064) internal successors, (56917), 53480 states have internal predecessors, (56917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:59,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53481 states to 53481 states and 56917 transitions. [2021-11-07 07:29:59,001 INFO L78 Accepts]: Start accepts. Automaton has 53481 states and 56917 transitions. Word has length 366 [2021-11-07 07:29:59,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:29:59,002 INFO L470 AbstractCegarLoop]: Abstraction has 53481 states and 56917 transitions. [2021-11-07 07:29:59,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:29:59,003 INFO L276 IsEmpty]: Start isEmpty. Operand 53481 states and 56917 transitions. [2021-11-07 07:29:59,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2021-11-07 07:29:59,043 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:29:59,046 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2021-11-07 07:29:59,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 07:29:59,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:29:59,261 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:29:59,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:29:59,261 INFO L85 PathProgramCache]: Analyzing trace with hash 397939553, now seen corresponding path program 1 times [2021-11-07 07:29:59,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:29:59,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418951369] [2021-11-07 07:29:59,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:59,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:29:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:59,459 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-07 07:29:59,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:29:59,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418951369] [2021-11-07 07:29:59,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418951369] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:29:59,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:29:59,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:29:59,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269550814] [2021-11-07 07:29:59,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:29:59,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:29:59,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:29:59,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:29:59,463 INFO L87 Difference]: Start difference. First operand 53481 states and 56917 transitions. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 2 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:30:00,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:30:00,641 INFO L93 Difference]: Finished difference Result 109602 states and 116566 transitions. [2021-11-07 07:30:00,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:30:00,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 2 states have internal predecessors, (253), 0 states have call successors, (0), 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 393 [2021-11-07 07:30:00,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:30:00,711 INFO L225 Difference]: With dead ends: 109602 [2021-11-07 07:30:00,711 INFO L226 Difference]: Without dead ends: 56123 [2021-11-07 07:30:00,737 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 07:30:00,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56123 states. [2021-11-07 07:30:01,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56123 to 55511. [2021-11-07 07:30:02,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55511 states, 55510 states have (on average 1.0630697171680779) internal successors, (59011), 55510 states have internal predecessors, (59011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:30:02,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55511 states to 55511 states and 59011 transitions. [2021-11-07 07:30:02,124 INFO L78 Accepts]: Start accepts. Automaton has 55511 states and 59011 transitions. Word has length 393 [2021-11-07 07:30:02,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:30:02,125 INFO L470 AbstractCegarLoop]: Abstraction has 55511 states and 59011 transitions. [2021-11-07 07:30:02,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 2 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:30:02,125 INFO L276 IsEmpty]: Start isEmpty. Operand 55511 states and 59011 transitions. [2021-11-07 07:30:02,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2021-11-07 07:30:02,169 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:30:02,169 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 07:30:02,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 07:30:02,170 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:30:02,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:30:02,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1185805506, now seen corresponding path program 1 times [2021-11-07 07:30:02,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:30:02,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954660992] [2021-11-07 07:30:02,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:30:02,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:30:02,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:02,359 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2021-11-07 07:30:02,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:30:02,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954660992] [2021-11-07 07:30:02,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954660992] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:30:02,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:30:02,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:30:02,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493571267] [2021-11-07 07:30:02,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:30:02,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:30:02,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:30:02,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:30:02,363 INFO L87 Difference]: Start difference. First operand 55511 states and 59011 transitions. Second operand has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:30:04,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:30:04,234 INFO L93 Difference]: Finished difference Result 150847 states and 160293 transitions. [2021-11-07 07:30:04,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:30:04,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 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 398 [2021-11-07 07:30:04,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:30:04,351 INFO L225 Difference]: With dead ends: 150847 [2021-11-07 07:30:04,351 INFO L226 Difference]: Without dead ends: 97368 [2021-11-07 07:30:04,370 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 07:30:04,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97368 states. [2021-11-07 07:30:05,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97368 to 94722. [2021-11-07 07:30:05,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94722 states, 94721 states have (on average 1.061718098415346) internal successors, (100567), 94721 states have internal predecessors, (100567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:30:06,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94722 states to 94722 states and 100567 transitions. [2021-11-07 07:30:06,280 INFO L78 Accepts]: Start accepts. Automaton has 94722 states and 100567 transitions. Word has length 398 [2021-11-07 07:30:06,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:30:06,281 INFO L470 AbstractCegarLoop]: Abstraction has 94722 states and 100567 transitions. [2021-11-07 07:30:06,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:30:06,281 INFO L276 IsEmpty]: Start isEmpty. Operand 94722 states and 100567 transitions. [2021-11-07 07:30:06,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2021-11-07 07:30:06,321 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:30:06,321 INFO L513 BasicCegarLoop]: trace histogram [5, 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, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 07:30:06,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 07:30:06,322 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:30:06,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:30:06,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1884846633, now seen corresponding path program 1 times [2021-11-07 07:30:06,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:30:06,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703876619] [2021-11-07 07:30:06,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:30:06,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:30:06,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 232 proven. 6 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-07 07:30:06,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:30:06,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703876619] [2021-11-07 07:30:06,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703876619] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:30:06,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428470858] [2021-11-07 07:30:06,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:30:06,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:30:06,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:30:06,536 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:30:06,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 07:30:08,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:08,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 07:30:08,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:30:09,065 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 232 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-07 07:30:09,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428470858] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:30:09,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:30:09,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-11-07 07:30:09,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759463150] [2021-11-07 07:30:09,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:30:09,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:30:09,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:30:09,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:30:09,069 INFO L87 Difference]: Start difference. First operand 94722 states and 100567 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 07:30:10,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:30:10,918 INFO L93 Difference]: Finished difference Result 268932 states and 285918 transitions. [2021-11-07 07:30:10,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:30:10,921 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 400 [2021-11-07 07:30:10,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:30:11,150 INFO L225 Difference]: With dead ends: 268932 [2021-11-07 07:30:11,151 INFO L226 Difference]: Without dead ends: 178475 [2021-11-07 07:30:11,214 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 399 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 07:30:11,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178475 states. [2021-11-07 07:30:13,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178475 to 178473. [2021-11-07 07:30:14,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178473 states, 178472 states have (on average 1.0627101169931419) internal successors, (189664), 178472 states have internal predecessors, (189664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:30:14,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178473 states to 178473 states and 189664 transitions. [2021-11-07 07:30:14,342 INFO L78 Accepts]: Start accepts. Automaton has 178473 states and 189664 transitions. Word has length 400 [2021-11-07 07:30:14,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:30:14,343 INFO L470 AbstractCegarLoop]: Abstraction has 178473 states and 189664 transitions. [2021-11-07 07:30:14,343 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 07:30:14,344 INFO L276 IsEmpty]: Start isEmpty. Operand 178473 states and 189664 transitions. [2021-11-07 07:30:14,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2021-11-07 07:30:14,372 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:30:14,372 INFO L513 BasicCegarLoop]: trace histogram [5, 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, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 07:30:14,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 07:30:14,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_951e99bd-0c03-4ec8-b2a5-1d8e0c74a9bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:30:14,574 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:30:14,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:30:14,575 INFO L85 PathProgramCache]: Analyzing trace with hash -792061351, now seen corresponding path program 1 times [2021-11-07 07:30:14,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:30:14,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336782400] [2021-11-07 07:30:14,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:30:14,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:30:15,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:15,668 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 325 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-07 07:30:15,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:30:15,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336782400] [2021-11-07 07:30:15,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336782400] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:30:15,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:30:15,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:30:15,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052484821] [2021-11-07 07:30:15,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:30:15,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:30:15,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:30:15,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:30:15,672 INFO L87 Difference]: Start difference. First operand 178473 states and 189664 transitions. Second operand has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:30:18,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:30:18,375 INFO L93 Difference]: Finished difference Result 374832 states and 398099 transitions. [2021-11-07 07:30:18,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:30:18,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 400 [2021-11-07 07:30:18,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:30:18,704 INFO L225 Difference]: With dead ends: 374832 [2021-11-07 07:30:18,704 INFO L226 Difference]: Without dead ends: 200421 [2021-11-07 07:30:18,788 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 07:30:18,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200421 states. [2021-11-07 07:30:22,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200421 to 200397. [2021-11-07 07:30:22,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200397 states, 200396 states have (on average 1.0582097447054832) internal successors, (212061), 200396 states have internal predecessors, (212061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:30:22,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200397 states to 200397 states and 212061 transitions. [2021-11-07 07:30:22,959 INFO L78 Accepts]: Start accepts. Automaton has 200397 states and 212061 transitions. Word has length 400 [2021-11-07 07:30:22,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:30:22,960 INFO L470 AbstractCegarLoop]: Abstraction has 200397 states and 212061 transitions. [2021-11-07 07:30:22,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:30:22,960 INFO L276 IsEmpty]: Start isEmpty. Operand 200397 states and 212061 transitions. [2021-11-07 07:30:23,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2021-11-07 07:30:23,005 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:30:23,005 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 07:30:23,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-07 07:30:23,006 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:30:23,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:30:23,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1777016498, now seen corresponding path program 1 times [2021-11-07 07:30:23,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:30:23,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196188622] [2021-11-07 07:30:23,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:30:23,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:30:23,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:30:23,314 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 334 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-07 07:30:23,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:30:23,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196188622] [2021-11-07 07:30:23,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196188622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:30:23,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:30:23,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:30:23,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266673859] [2021-11-07 07:30:23,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:30:23,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:30:23,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:30:23,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:30:23,319 INFO L87 Difference]: Start difference. First operand 200397 states and 212061 transitions. Second operand has 4 states, 4 states have (on average 88.75) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:30:26,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:30:26,309 INFO L93 Difference]: Finished difference Result 397341 states and 420502 transitions. [2021-11-07 07:30:26,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:30:26,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 88.75) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 415 [2021-11-07 07:30:26,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:30:26,663 INFO L225 Difference]: With dead ends: 397341 [2021-11-07 07:30:26,663 INFO L226 Difference]: Without dead ends: 200397 [2021-11-07 07:30:27,577 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 07:30:27,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200397 states.