./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-new/count_by_nondet.i --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_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/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_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-new/count_by_nondet.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/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_6d89de33-996c-4125-95a8-ddb5aace5515/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 3467a31f3cd19e731a18eaf7789079f202f3b29e437ef24ddd0458f09610424d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:48:39,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:48:39,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:48:39,347 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:48:39,348 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:48:39,349 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:48:39,351 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:48:39,354 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:48:39,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:48:39,357 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:48:39,359 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:48:39,360 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:48:39,361 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:48:39,362 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:48:39,363 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:48:39,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:48:39,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:48:39,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:48:39,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:48:39,372 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:48:39,375 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:48:39,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:48:39,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:48:39,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:48:39,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:48:39,384 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:48:39,384 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:48:39,385 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:48:39,386 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:48:39,387 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:48:39,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:48:39,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:48:39,390 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:48:39,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:48:39,392 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:48:39,392 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:48:39,393 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:48:39,393 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:48:39,394 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:48:39,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:48:39,396 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:48:39,397 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:48:39,421 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:48:39,421 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:48:39,421 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:48:39,422 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:48:39,423 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:48:39,423 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:48:39,423 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:48:39,423 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:48:39,424 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:48:39,424 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:48:39,424 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:48:39,424 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:48:39,424 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:48:39,425 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:48:39,425 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:48:39,425 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:48:39,425 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:48:39,426 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:48:39,426 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:48:39,426 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:48:39,426 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:48:39,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:48:39,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:48:39,427 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:48:39,427 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:48:39,427 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:48:39,428 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:48:39,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:48:39,428 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:48:39,428 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:48:39,428 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:48:39,429 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:48:39,429 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_6d89de33-996c-4125-95a8-ddb5aace5515/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3467a31f3cd19e731a18eaf7789079f202f3b29e437ef24ddd0458f09610424d [2021-11-07 07:48:39,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:48:39,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:48:39,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:48:39,704 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:48:39,705 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:48:39,706 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/loop-new/count_by_nondet.i [2021-11-07 07:48:39,773 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/data/44590e1f6/da15da3a3b3c4f84ad86fb691b02c451/FLAG1ba0a729c [2021-11-07 07:48:40,207 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:48:40,207 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/sv-benchmarks/c/loop-new/count_by_nondet.i [2021-11-07 07:48:40,213 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/data/44590e1f6/da15da3a3b3c4f84ad86fb691b02c451/FLAG1ba0a729c [2021-11-07 07:48:40,602 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/data/44590e1f6/da15da3a3b3c4f84ad86fb691b02c451 [2021-11-07 07:48:40,604 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:48:40,606 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:48:40,607 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:48:40,607 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:48:40,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:48:40,611 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:48:40" (1/1) ... [2021-11-07 07:48:40,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6086958d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:40, skipping insertion in model container [2021-11-07 07:48:40,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:48:40" (1/1) ... [2021-11-07 07:48:40,619 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:48:40,633 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:48:40,767 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_6d89de33-996c-4125-95a8-ddb5aace5515/sv-benchmarks/c/loop-new/count_by_nondet.i[891,904] [2021-11-07 07:48:40,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:48:40,809 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:48:40,824 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_6d89de33-996c-4125-95a8-ddb5aace5515/sv-benchmarks/c/loop-new/count_by_nondet.i[891,904] [2021-11-07 07:48:40,829 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:48:40,846 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:48:40,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:40 WrapperNode [2021-11-07 07:48:40,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:48:40,847 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:48:40,847 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:48:40,848 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:48:40,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:40" (1/1) ... [2021-11-07 07:48:40,859 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:40" (1/1) ... [2021-11-07 07:48:40,875 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:48:40,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:48:40,876 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:48:40,876 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:48:40,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:40" (1/1) ... [2021-11-07 07:48:40,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:40" (1/1) ... [2021-11-07 07:48:40,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:40" (1/1) ... [2021-11-07 07:48:40,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:40" (1/1) ... [2021-11-07 07:48:40,889 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:40" (1/1) ... [2021-11-07 07:48:40,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:40" (1/1) ... [2021-11-07 07:48:40,901 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:40" (1/1) ... [2021-11-07 07:48:40,903 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:48:40,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:48:40,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:48:40,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:48:40,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:40" (1/1) ... [2021-11-07 07:48:40,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:48:40,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:40,949 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:48:40,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:48:40,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:48:40,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:48:40,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:48:40,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:48:41,216 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:48:41,216 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-07 07:48:41,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:48:41 BoogieIcfgContainer [2021-11-07 07:48:41,218 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:48:41,220 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:48:41,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:48:41,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:48:41,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:48:40" (1/3) ... [2021-11-07 07:48:41,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b20f45a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:48:41, skipping insertion in model container [2021-11-07 07:48:41,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:48:40" (2/3) ... [2021-11-07 07:48:41,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b20f45a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:48:41, skipping insertion in model container [2021-11-07 07:48:41,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:48:41" (3/3) ... [2021-11-07 07:48:41,232 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_nondet.i [2021-11-07 07:48:41,242 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:48:41,243 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 07:48:41,302 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:48:41,312 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 07:48:41,312 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 07:48:41,329 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:41,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 07:48:41,333 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:41,333 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 07:48:41,334 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:41,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:41,341 INFO L85 PathProgramCache]: Analyzing trace with hash 889906919, now seen corresponding path program 1 times [2021-11-07 07:48:41,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:41,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145244569] [2021-11-07 07:48:41,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:41,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:41,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:41,491 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 07:48:41,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:41,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145244569] [2021-11-07 07:48:41,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145244569] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:48:41,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:48:41,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:48:41,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286904387] [2021-11-07 07:48:41,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 07:48:41,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:41,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 07:48:41,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 07:48:41,532 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:41,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:41,545 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-11-07 07:48:41,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 07:48:41,547 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-11-07 07:48:41,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:41,554 INFO L225 Difference]: With dead ends: 20 [2021-11-07 07:48:41,554 INFO L226 Difference]: Without dead ends: 8 [2021-11-07 07:48:41,557 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 07:48:41,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-07 07:48:41,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-07 07:48:41,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:41,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-11-07 07:48:41,585 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-11-07 07:48:41,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:41,585 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-11-07 07:48:41,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:41,586 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-11-07 07:48:41,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 07:48:41,587 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:41,587 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 07:48:41,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:48:41,588 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:41,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:41,589 INFO L85 PathProgramCache]: Analyzing trace with hash 889638800, now seen corresponding path program 1 times [2021-11-07 07:48:41,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:41,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189012925] [2021-11-07 07:48:41,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:41,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:41,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:41,630 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 07:48:41,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:41,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189012925] [2021-11-07 07:48:41,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189012925] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:48:41,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:48:41,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:48:41,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412736463] [2021-11-07 07:48:41,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:48:41,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:41,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:48:41,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:48:41,635 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:41,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:41,647 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-11-07 07:48:41,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:48:41,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-11-07 07:48:41,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:41,649 INFO L225 Difference]: With dead ends: 14 [2021-11-07 07:48:41,649 INFO L226 Difference]: Without dead ends: 10 [2021-11-07 07:48:41,650 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 07:48:41,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-07 07:48:41,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2021-11-07 07:48:41,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:41,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-07 07:48:41,653 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2021-11-07 07:48:41,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:41,654 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-07 07:48:41,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:41,669 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-07 07:48:41,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 07:48:41,669 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:41,670 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:41,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 07:48:41,670 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:41,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:41,671 INFO L85 PathProgramCache]: Analyzing trace with hash 297537973, now seen corresponding path program 1 times [2021-11-07 07:48:41,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:41,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646316759] [2021-11-07 07:48:41,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:41,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:41,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:41,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:41,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646316759] [2021-11-07 07:48:41,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646316759] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:41,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117592436] [2021-11-07 07:48:41,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:41,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:41,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:41,778 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:41,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:48:41,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:41,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 07:48:41,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:41,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:41,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117592436] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:41,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:41,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-07 07:48:41,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381624231] [2021-11-07 07:48:41,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:48:41,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:41,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:48:41,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:48:41,950 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:41,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:41,967 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-11-07 07:48:41,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:48:41,968 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 8 [2021-11-07 07:48:41,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:41,969 INFO L225 Difference]: With dead ends: 15 [2021-11-07 07:48:41,969 INFO L226 Difference]: Without dead ends: 11 [2021-11-07 07:48:41,969 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:48:41,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-07 07:48:41,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-07 07:48:41,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:41,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-11-07 07:48:41,973 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2021-11-07 07:48:41,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:41,973 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-11-07 07:48:41,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:41,974 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-11-07 07:48:41,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 07:48:41,974 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:41,974 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:42,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:42,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:42,198 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:42,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:42,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1775673702, now seen corresponding path program 2 times [2021-11-07 07:48:42,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:42,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28813076] [2021-11-07 07:48:42,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:42,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:42,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:42,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:42,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28813076] [2021-11-07 07:48:42,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28813076] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:42,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520908852] [2021-11-07 07:48:42,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:48:42,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:42,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:42,331 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:42,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 07:48:42,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:48:42,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:42,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 07:48:42,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:42,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:42,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520908852] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:42,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:42,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-07 07:48:42,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404534539] [2021-11-07 07:48:42,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 07:48:42,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:42,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 07:48:42,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:48:42,509 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:42,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:42,551 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-11-07 07:48:42,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:48:42,551 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-07 07:48:42,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:42,552 INFO L225 Difference]: With dead ends: 18 [2021-11-07 07:48:42,552 INFO L226 Difference]: Without dead ends: 14 [2021-11-07 07:48:42,553 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:48:42,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-07 07:48:42,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-11-07 07:48:42,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:42,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-11-07 07:48:42,556 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2021-11-07 07:48:42,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:42,557 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-11-07 07:48:42,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:42,557 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-11-07 07:48:42,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 07:48:42,558 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:42,558 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:42,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:42,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:42,759 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:42,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:42,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1267268033, now seen corresponding path program 3 times [2021-11-07 07:48:42,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:42,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049773506] [2021-11-07 07:48:42,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:42,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:42,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:42,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:42,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049773506] [2021-11-07 07:48:42,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049773506] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:42,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670630836] [2021-11-07 07:48:42,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:48:42,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:42,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:42,878 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:42,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 07:48:42,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 07:48:42,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:42,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 07:48:42,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:43,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670630836] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:43,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:43,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-07 07:48:43,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40312639] [2021-11-07 07:48:43,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:48:43,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:43,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:48:43,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:48:43,045 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:43,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:43,083 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-11-07 07:48:43,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:48:43,084 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-07 07:48:43,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:43,087 INFO L225 Difference]: With dead ends: 20 [2021-11-07 07:48:43,087 INFO L226 Difference]: Without dead ends: 16 [2021-11-07 07:48:43,088 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:48:43,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-07 07:48:43,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-11-07 07:48:43,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:43,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-07 07:48:43,098 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2021-11-07 07:48:43,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:43,099 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-07 07:48:43,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:43,102 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-07 07:48:43,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 07:48:43,103 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:43,104 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:43,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:43,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:43,320 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:43,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:43,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1979275428, now seen corresponding path program 4 times [2021-11-07 07:48:43,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:43,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084197358] [2021-11-07 07:48:43,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:43,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:43,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:43,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:43,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084197358] [2021-11-07 07:48:43,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084197358] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:43,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643052221] [2021-11-07 07:48:43,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:48:43,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:43,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:43,441 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:43,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 07:48:43,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:48:43,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:43,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 07:48:43,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:43,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:43,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643052221] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:43,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:43,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-11-07 07:48:43,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794064934] [2021-11-07 07:48:43,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 07:48:43,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:43,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 07:48:43,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:48:43,599 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:43,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:43,629 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-11-07 07:48:43,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 07:48:43,630 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-07 07:48:43,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:43,631 INFO L225 Difference]: With dead ends: 22 [2021-11-07 07:48:43,632 INFO L226 Difference]: Without dead ends: 18 [2021-11-07 07:48:43,632 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-07 07:48:43,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-07 07:48:43,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-11-07 07:48:43,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:43,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-11-07 07:48:43,638 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2021-11-07 07:48:43,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:43,639 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-11-07 07:48:43,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:43,639 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-11-07 07:48:43,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 07:48:43,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:43,640 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:43,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:43,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-07 07:48:43,865 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:43,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:43,866 INFO L85 PathProgramCache]: Analyzing trace with hash -533682743, now seen corresponding path program 5 times [2021-11-07 07:48:43,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:43,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85488381] [2021-11-07 07:48:43,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:43,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:43,968 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:43,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:43,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85488381] [2021-11-07 07:48:43,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85488381] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:43,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345217212] [2021-11-07 07:48:43,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:48:43,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:43,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:43,973 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:43,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 07:48:44,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-07 07:48:44,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:44,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 07:48:44,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:44,129 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:44,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345217212] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:44,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:44,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-11-07 07:48:44,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106091759] [2021-11-07 07:48:44,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 07:48:44,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:44,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 07:48:44,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-07 07:48:44,136 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:44,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:44,164 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-11-07 07:48:44,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 07:48:44,165 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-07 07:48:44,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:44,166 INFO L225 Difference]: With dead ends: 24 [2021-11-07 07:48:44,166 INFO L226 Difference]: Without dead ends: 20 [2021-11-07 07:48:44,167 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:48:44,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-07 07:48:44,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-11-07 07:48:44,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:44,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-11-07 07:48:44,174 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2021-11-07 07:48:44,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:44,175 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-11-07 07:48:44,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:44,175 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-11-07 07:48:44,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 07:48:44,177 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:44,177 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:44,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:44,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:44,394 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:44,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:44,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1714864722, now seen corresponding path program 6 times [2021-11-07 07:48:44,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:44,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370984730] [2021-11-07 07:48:44,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:44,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:44,504 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:44,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:44,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370984730] [2021-11-07 07:48:44,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370984730] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:44,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261382976] [2021-11-07 07:48:44,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:48:44,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:44,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:44,506 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:44,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 07:48:44,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-07 07:48:44,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:44,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 07:48:44,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:44,679 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:44,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261382976] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:44,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:44,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-11-07 07:48:44,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237289545] [2021-11-07 07:48:44,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 07:48:44,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:44,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 07:48:44,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:48:44,683 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:44,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:44,709 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-11-07 07:48:44,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 07:48:44,709 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-07 07:48:44,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:44,710 INFO L225 Difference]: With dead ends: 26 [2021-11-07 07:48:44,710 INFO L226 Difference]: Without dead ends: 22 [2021-11-07 07:48:44,711 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:48:44,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-07 07:48:44,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-11-07 07:48:44,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:44,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-11-07 07:48:44,720 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2021-11-07 07:48:44,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:44,721 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-11-07 07:48:44,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:44,721 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-11-07 07:48:44,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 07:48:44,722 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:44,722 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:44,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:44,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:44,949 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:44,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:44,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1335586899, now seen corresponding path program 7 times [2021-11-07 07:48:44,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:44,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021624430] [2021-11-07 07:48:44,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:44,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:44,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:45,049 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:45,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:45,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021624430] [2021-11-07 07:48:45,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021624430] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:45,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99905579] [2021-11-07 07:48:45,050 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:48:45,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:45,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:45,051 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:45,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 07:48:45,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:45,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 07:48:45,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:45,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99905579] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:45,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:45,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-11-07 07:48:45,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027774142] [2021-11-07 07:48:45,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 07:48:45,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:45,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 07:48:45,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:48:45,220 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:45,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:45,243 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-11-07 07:48:45,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 07:48:45,244 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-07 07:48:45,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:45,244 INFO L225 Difference]: With dead ends: 28 [2021-11-07 07:48:45,245 INFO L226 Difference]: Without dead ends: 24 [2021-11-07 07:48:45,245 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-11-07 07:48:45,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-07 07:48:45,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-11-07 07:48:45,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:45,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-11-07 07:48:45,248 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2021-11-07 07:48:45,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:45,248 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-11-07 07:48:45,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:45,249 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-11-07 07:48:45,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 07:48:45,249 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:45,249 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:45,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:45,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:45,457 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:45,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:45,457 INFO L85 PathProgramCache]: Analyzing trace with hash -643068488, now seen corresponding path program 8 times [2021-11-07 07:48:45,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:45,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410567421] [2021-11-07 07:48:45,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:45,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:45,647 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:45,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:45,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410567421] [2021-11-07 07:48:45,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410567421] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:45,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806110869] [2021-11-07 07:48:45,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:48:45,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:45,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:45,649 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:45,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 07:48:45,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:48:45,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:45,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 07:48:45,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:45,832 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:45,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806110869] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:45,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:45,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-11-07 07:48:45,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704138049] [2021-11-07 07:48:45,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 07:48:45,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:45,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 07:48:45,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-11-07 07:48:45,834 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:45,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:45,870 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-11-07 07:48:45,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 07:48:45,872 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-07 07:48:45,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:45,872 INFO L225 Difference]: With dead ends: 30 [2021-11-07 07:48:45,873 INFO L226 Difference]: Without dead ends: 26 [2021-11-07 07:48:45,874 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:48:45,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-07 07:48:45,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-11-07 07:48:45,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:45,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-11-07 07:48:45,881 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2021-11-07 07:48:45,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:45,882 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-11-07 07:48:45,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:45,882 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-11-07 07:48:45,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 07:48:45,883 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:45,883 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:45,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:46,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:46,097 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:46,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:46,097 INFO L85 PathProgramCache]: Analyzing trace with hash 539616733, now seen corresponding path program 9 times [2021-11-07 07:48:46,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:46,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500081839] [2021-11-07 07:48:46,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:46,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:46,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:46,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500081839] [2021-11-07 07:48:46,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500081839] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:46,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452323797] [2021-11-07 07:48:46,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:48:46,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:46,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:46,249 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:46,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 07:48:46,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-07 07:48:46,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:46,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 07:48:46,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:46,432 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:46,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452323797] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:46,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:46,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-11-07 07:48:46,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678937838] [2021-11-07 07:48:46,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 07:48:46,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:46,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 07:48:46,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:48:46,434 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:46,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:46,461 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-11-07 07:48:46,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 07:48:46,462 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 07:48:46,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:46,463 INFO L225 Difference]: With dead ends: 32 [2021-11-07 07:48:46,463 INFO L226 Difference]: Without dead ends: 28 [2021-11-07 07:48:46,463 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:48:46,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-07 07:48:46,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-11-07 07:48:46,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:46,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-11-07 07:48:46,467 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2021-11-07 07:48:46,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:46,467 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-11-07 07:48:46,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:46,468 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-11-07 07:48:46,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 07:48:46,468 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:46,469 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:46,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:46,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:46,685 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:46,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:46,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1066219326, now seen corresponding path program 10 times [2021-11-07 07:48:46,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:46,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864332327] [2021-11-07 07:48:46,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:46,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:46,807 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:46,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:46,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864332327] [2021-11-07 07:48:46,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864332327] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:46,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985278442] [2021-11-07 07:48:46,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:48:46,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:46,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:46,813 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:46,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 07:48:46,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:48:46,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:46,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 07:48:46,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:47,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985278442] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:47,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:47,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-11-07 07:48:47,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106271943] [2021-11-07 07:48:47,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 07:48:47,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:47,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 07:48:47,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:48:47,043 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:47,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:47,076 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-11-07 07:48:47,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 07:48:47,077 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-07 07:48:47,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:47,078 INFO L225 Difference]: With dead ends: 34 [2021-11-07 07:48:47,078 INFO L226 Difference]: Without dead ends: 30 [2021-11-07 07:48:47,078 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:48:47,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-07 07:48:47,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-11-07 07:48:47,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:47,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-11-07 07:48:47,088 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2021-11-07 07:48:47,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:47,089 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-11-07 07:48:47,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:47,090 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-11-07 07:48:47,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 07:48:47,091 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:47,091 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:47,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:47,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-07 07:48:47,301 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:47,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:47,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1913554535, now seen corresponding path program 11 times [2021-11-07 07:48:47,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:47,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435442040] [2021-11-07 07:48:47,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:47,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:47,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:47,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435442040] [2021-11-07 07:48:47,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435442040] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:47,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702236792] [2021-11-07 07:48:47,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:48:47,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:47,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:47,435 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:47,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 07:48:47,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-07 07:48:47,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:47,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 07:48:47,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:47,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702236792] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:47,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:47,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-11-07 07:48:47,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150807468] [2021-11-07 07:48:47,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 07:48:47,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:47,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 07:48:47,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:48:47,694 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:47,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:47,720 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-11-07 07:48:47,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 07:48:47,721 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-07 07:48:47,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:47,721 INFO L225 Difference]: With dead ends: 36 [2021-11-07 07:48:47,722 INFO L226 Difference]: Without dead ends: 32 [2021-11-07 07:48:47,722 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:48:47,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-07 07:48:47,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-11-07 07:48:47,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:47,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-11-07 07:48:47,731 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2021-11-07 07:48:47,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:47,732 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-11-07 07:48:47,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:47,733 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-11-07 07:48:47,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 07:48:47,735 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:47,735 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:47,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:47,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-07 07:48:47,953 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:47,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:47,953 INFO L85 PathProgramCache]: Analyzing trace with hash 733048524, now seen corresponding path program 12 times [2021-11-07 07:48:47,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:47,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206883192] [2021-11-07 07:48:47,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:47,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:48,101 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:48,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:48,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206883192] [2021-11-07 07:48:48,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206883192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:48,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690595342] [2021-11-07 07:48:48,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:48:48,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:48,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:48,109 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:48,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 07:48:48,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-07 07:48:48,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:48,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 07:48:48,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:48,351 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:48,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690595342] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:48,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:48,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-11-07 07:48:48,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771881666] [2021-11-07 07:48:48,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 07:48:48,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:48,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 07:48:48,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:48:48,354 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:48,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:48,389 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-11-07 07:48:48,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 07:48:48,389 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-07 07:48:48,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:48,390 INFO L225 Difference]: With dead ends: 38 [2021-11-07 07:48:48,390 INFO L226 Difference]: Without dead ends: 34 [2021-11-07 07:48:48,391 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=212, Unknown=0, NotChecked=0, Total=342 [2021-11-07 07:48:48,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-07 07:48:48,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-11-07 07:48:48,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:48,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-11-07 07:48:48,394 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2021-11-07 07:48:48,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:48,395 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-11-07 07:48:48,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:48,395 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-11-07 07:48:48,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 07:48:48,396 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:48,396 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:48,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:48,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 07:48:48,622 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:48,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:48,622 INFO L85 PathProgramCache]: Analyzing trace with hash 138138097, now seen corresponding path program 13 times [2021-11-07 07:48:48,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:48,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801018446] [2021-11-07 07:48:48,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:48,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:48,794 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:48,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:48,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801018446] [2021-11-07 07:48:48,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801018446] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:48,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624006454] [2021-11-07 07:48:48,795 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:48:48,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:48,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:48,796 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:48,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 07:48:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:48,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 07:48:48,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:49,065 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:49,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624006454] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:49,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:49,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-11-07 07:48:49,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515551880] [2021-11-07 07:48:49,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 07:48:49,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:49,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 07:48:49,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2021-11-07 07:48:49,068 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:49,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:49,111 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-11-07 07:48:49,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 07:48:49,112 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-07 07:48:49,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:49,114 INFO L225 Difference]: With dead ends: 40 [2021-11-07 07:48:49,114 INFO L226 Difference]: Without dead ends: 36 [2021-11-07 07:48:49,118 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2021-11-07 07:48:49,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-07 07:48:49,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-11-07 07:48:49,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:49,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-11-07 07:48:49,124 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2021-11-07 07:48:49,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:49,126 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-11-07 07:48:49,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:49,127 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-11-07 07:48:49,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 07:48:49,129 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:49,129 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:49,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:49,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 07:48:49,347 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:49,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:49,347 INFO L85 PathProgramCache]: Analyzing trace with hash -340131882, now seen corresponding path program 14 times [2021-11-07 07:48:49,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:49,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650681773] [2021-11-07 07:48:49,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:49,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:49,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:49,527 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:49,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:49,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650681773] [2021-11-07 07:48:49,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650681773] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:49,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94397984] [2021-11-07 07:48:49,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:48:49,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:49,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:49,529 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:49,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 07:48:49,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:48:49,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:49,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 07:48:49,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:49,799 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:49,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94397984] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:49,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:49,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-11-07 07:48:49,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294536973] [2021-11-07 07:48:49,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 07:48:49,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:49,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 07:48:49,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2021-11-07 07:48:49,802 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:49,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:49,837 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-11-07 07:48:49,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 07:48:49,838 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-07 07:48:49,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:49,839 INFO L225 Difference]: With dead ends: 42 [2021-11-07 07:48:49,839 INFO L226 Difference]: Without dead ends: 38 [2021-11-07 07:48:49,839 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=257, Unknown=0, NotChecked=0, Total=420 [2021-11-07 07:48:49,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-07 07:48:49,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-11-07 07:48:49,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:49,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-11-07 07:48:49,845 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2021-11-07 07:48:49,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:49,847 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-11-07 07:48:49,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:49,847 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-11-07 07:48:49,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 07:48:49,848 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:49,848 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:49,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:50,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 07:48:50,061 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:50,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:50,061 INFO L85 PathProgramCache]: Analyzing trace with hash -396081029, now seen corresponding path program 15 times [2021-11-07 07:48:50,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:50,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654585903] [2021-11-07 07:48:50,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:50,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:50,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:50,258 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:50,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:50,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654585903] [2021-11-07 07:48:50,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654585903] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:50,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354234242] [2021-11-07 07:48:50,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:48:50,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:50,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:50,260 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:50,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 07:48:50,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-07 07:48:50,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:50,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 07:48:50,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:50,563 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:50,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354234242] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:50,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:50,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-11-07 07:48:50,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268470018] [2021-11-07 07:48:50,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 07:48:50,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:50,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 07:48:50,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2021-11-07 07:48:50,566 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:50,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:50,604 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-11-07 07:48:50,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 07:48:50,605 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-07 07:48:50,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:50,606 INFO L225 Difference]: With dead ends: 44 [2021-11-07 07:48:50,606 INFO L226 Difference]: Without dead ends: 40 [2021-11-07 07:48:50,606 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=181, Invalid=281, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:48:50,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-07 07:48:50,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-11-07 07:48:50,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:50,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-11-07 07:48:50,610 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2021-11-07 07:48:50,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:50,611 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-11-07 07:48:50,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:50,611 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-11-07 07:48:50,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 07:48:50,612 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:50,612 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:50,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:50,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:50,833 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:50,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:50,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1671363552, now seen corresponding path program 16 times [2021-11-07 07:48:50,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:50,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54911943] [2021-11-07 07:48:50,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:50,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:50,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:51,042 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:51,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:51,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54911943] [2021-11-07 07:48:51,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54911943] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:51,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915407475] [2021-11-07 07:48:51,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:48:51,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:51,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:51,044 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:51,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 07:48:51,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:48:51,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:51,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 07:48:51,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:51,347 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:51,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915407475] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:51,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:51,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-11-07 07:48:51,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454805385] [2021-11-07 07:48:51,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 07:48:51,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:51,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 07:48:51,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:48:51,350 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:51,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:51,390 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-11-07 07:48:51,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 07:48:51,391 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-07 07:48:51,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:51,391 INFO L225 Difference]: With dead ends: 46 [2021-11-07 07:48:51,391 INFO L226 Difference]: Without dead ends: 42 [2021-11-07 07:48:51,392 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=306, Unknown=0, NotChecked=0, Total=506 [2021-11-07 07:48:51,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-07 07:48:51,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-11-07 07:48:51,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:51,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-11-07 07:48:51,396 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2021-11-07 07:48:51,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:51,397 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-11-07 07:48:51,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:51,397 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-11-07 07:48:51,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 07:48:51,399 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:51,399 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:51,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:51,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 07:48:51,613 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:51,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:51,613 INFO L85 PathProgramCache]: Analyzing trace with hash -84252155, now seen corresponding path program 17 times [2021-11-07 07:48:51,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:51,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855742956] [2021-11-07 07:48:51,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:51,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:51,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:51,839 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:51,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:51,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855742956] [2021-11-07 07:48:51,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855742956] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:51,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728279691] [2021-11-07 07:48:51,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:48:51,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:51,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:51,840 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:51,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 07:48:52,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-07 07:48:52,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:52,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 07:48:52,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:52,172 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:52,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728279691] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:52,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:52,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-11-07 07:48:52,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319948634] [2021-11-07 07:48:52,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 07:48:52,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:52,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 07:48:52,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2021-11-07 07:48:52,175 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:52,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:52,211 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-11-07 07:48:52,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 07:48:52,212 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-07 07:48:52,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:52,213 INFO L225 Difference]: With dead ends: 48 [2021-11-07 07:48:52,213 INFO L226 Difference]: Without dead ends: 44 [2021-11-07 07:48:52,213 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=220, Invalid=332, Unknown=0, NotChecked=0, Total=552 [2021-11-07 07:48:52,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-07 07:48:52,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-11-07 07:48:52,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:52,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-11-07 07:48:52,217 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2021-11-07 07:48:52,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:52,217 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-11-07 07:48:52,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:52,218 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-11-07 07:48:52,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 07:48:52,218 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:52,219 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:52,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:52,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:52,438 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:52,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:52,439 INFO L85 PathProgramCache]: Analyzing trace with hash 691200746, now seen corresponding path program 18 times [2021-11-07 07:48:52,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:52,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343892809] [2021-11-07 07:48:52,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:52,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:52,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:52,689 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:52,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:52,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343892809] [2021-11-07 07:48:52,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343892809] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:52,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150922862] [2021-11-07 07:48:52,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:48:52,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:52,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:52,690 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:52,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 07:48:52,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-07 07:48:52,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:52,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 07:48:52,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:53,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150922862] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:53,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:53,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-11-07 07:48:53,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723821941] [2021-11-07 07:48:53,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 07:48:53,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:53,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 07:48:53,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2021-11-07 07:48:53,045 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:53,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:53,085 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-11-07 07:48:53,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 07:48:53,085 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-07 07:48:53,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:53,086 INFO L225 Difference]: With dead ends: 50 [2021-11-07 07:48:53,086 INFO L226 Difference]: Without dead ends: 46 [2021-11-07 07:48:53,087 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=241, Invalid=359, Unknown=0, NotChecked=0, Total=600 [2021-11-07 07:48:53,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-07 07:48:53,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-11-07 07:48:53,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:53,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-11-07 07:48:53,091 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2021-11-07 07:48:53,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:53,091 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-11-07 07:48:53,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:53,092 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-11-07 07:48:53,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 07:48:53,092 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:53,093 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:53,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:53,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:53,297 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:53,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:53,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1422870897, now seen corresponding path program 19 times [2021-11-07 07:48:53,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:53,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030685729] [2021-11-07 07:48:53,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:53,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:53,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:53,573 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:53,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:53,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030685729] [2021-11-07 07:48:53,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030685729] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:53,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378412648] [2021-11-07 07:48:53,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:48:53,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:53,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:53,581 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:53,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 07:48:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:53,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 07:48:53,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:53,972 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:53,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378412648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:53,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:53,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-11-07 07:48:53,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120330377] [2021-11-07 07:48:53,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 07:48:53,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:53,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 07:48:53,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2021-11-07 07:48:53,976 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:54,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:54,018 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-11-07 07:48:54,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 07:48:54,019 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 07:48:54,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:54,020 INFO L225 Difference]: With dead ends: 52 [2021-11-07 07:48:54,020 INFO L226 Difference]: Without dead ends: 48 [2021-11-07 07:48:54,020 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=387, Unknown=0, NotChecked=0, Total=650 [2021-11-07 07:48:54,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-07 07:48:54,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-11-07 07:48:54,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:54,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-11-07 07:48:54,026 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2021-11-07 07:48:54,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:54,026 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-11-07 07:48:54,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:54,026 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-11-07 07:48:54,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 07:48:54,029 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:54,029 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:54,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:54,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-07 07:48:54,249 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:54,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:54,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1526188812, now seen corresponding path program 20 times [2021-11-07 07:48:54,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:54,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294899110] [2021-11-07 07:48:54,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:54,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:54,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:54,531 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:54,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:54,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294899110] [2021-11-07 07:48:54,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294899110] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:54,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378550452] [2021-11-07 07:48:54,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:48:54,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:54,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:54,533 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:54,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 07:48:54,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:48:54,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:54,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 07:48:54,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:54,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378550452] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:54,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:54,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-11-07 07:48:54,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81123401] [2021-11-07 07:48:54,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 07:48:54,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:54,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 07:48:54,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2021-11-07 07:48:54,919 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:54,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:54,961 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-11-07 07:48:54,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 07:48:54,962 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 07:48:54,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:54,962 INFO L225 Difference]: With dead ends: 54 [2021-11-07 07:48:54,963 INFO L226 Difference]: Without dead ends: 50 [2021-11-07 07:48:54,963 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=286, Invalid=416, Unknown=0, NotChecked=0, Total=702 [2021-11-07 07:48:54,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-07 07:48:54,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-11-07 07:48:54,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:54,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-11-07 07:48:54,967 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2021-11-07 07:48:54,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:54,967 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-11-07 07:48:54,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:54,967 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-11-07 07:48:54,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 07:48:54,968 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:54,968 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:55,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:55,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-07 07:48:55,193 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:55,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:55,193 INFO L85 PathProgramCache]: Analyzing trace with hash -2030457319, now seen corresponding path program 21 times [2021-11-07 07:48:55,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:55,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71351264] [2021-11-07 07:48:55,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:55,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:55,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:55,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:55,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71351264] [2021-11-07 07:48:55,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71351264] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:55,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642263431] [2021-11-07 07:48:55,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:48:55,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:55,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:55,466 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:55,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 07:48:55,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-11-07 07:48:55,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:55,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 07:48:55,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:55,877 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:55,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642263431] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:55,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:55,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-11-07 07:48:55,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989992164] [2021-11-07 07:48:55,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 07:48:55,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:55,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 07:48:55,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2021-11-07 07:48:55,880 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:55,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:55,927 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-11-07 07:48:55,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 07:48:55,927 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 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 48 [2021-11-07 07:48:55,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:55,928 INFO L225 Difference]: With dead ends: 56 [2021-11-07 07:48:55,928 INFO L226 Difference]: Without dead ends: 52 [2021-11-07 07:48:55,929 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=310, Invalid=446, Unknown=0, NotChecked=0, Total=756 [2021-11-07 07:48:55,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-07 07:48:55,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-11-07 07:48:55,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:55,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-11-07 07:48:55,932 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2021-11-07 07:48:55,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:55,933 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-11-07 07:48:55,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:55,933 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-11-07 07:48:55,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 07:48:55,934 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:55,934 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:55,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:56,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-07 07:48:56,157 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:56,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:56,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1301188098, now seen corresponding path program 22 times [2021-11-07 07:48:56,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:56,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096799837] [2021-11-07 07:48:56,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:56,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:56,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:56,439 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:56,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:56,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096799837] [2021-11-07 07:48:56,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096799837] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:56,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077180491] [2021-11-07 07:48:56,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:48:56,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:56,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:56,442 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:56,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 07:48:56,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:48:56,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:56,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 07:48:56,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:56,858 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:56,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077180491] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:56,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:56,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-11-07 07:48:56,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630380202] [2021-11-07 07:48:56,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-07 07:48:56,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:56,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-07 07:48:56,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2021-11-07 07:48:56,861 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:56,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:56,902 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-11-07 07:48:56,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 07:48:56,902 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-07 07:48:56,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:56,903 INFO L225 Difference]: With dead ends: 58 [2021-11-07 07:48:56,903 INFO L226 Difference]: Without dead ends: 54 [2021-11-07 07:48:56,904 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=335, Invalid=477, Unknown=0, NotChecked=0, Total=812 [2021-11-07 07:48:56,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-07 07:48:56,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-11-07 07:48:56,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:56,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-11-07 07:48:56,907 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2021-11-07 07:48:56,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:56,907 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-11-07 07:48:56,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:56,908 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-11-07 07:48:56,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 07:48:56,908 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:56,909 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:56,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:57,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:57,130 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:57,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:57,130 INFO L85 PathProgramCache]: Analyzing trace with hash -553135965, now seen corresponding path program 23 times [2021-11-07 07:48:57,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:57,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092447614] [2021-11-07 07:48:57,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:57,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:57,450 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:57,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:57,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092447614] [2021-11-07 07:48:57,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092447614] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:57,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004984501] [2021-11-07 07:48:57,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:48:57,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:57,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:57,453 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:57,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 07:48:57,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-11-07 07:48:57,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:57,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 07:48:57,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:57,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004984501] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:57,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:57,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-11-07 07:48:57,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645887980] [2021-11-07 07:48:57,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-07 07:48:57,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:57,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-07 07:48:57,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2021-11-07 07:48:57,944 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:57,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:57,992 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-11-07 07:48:57,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 07:48:57,993 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 07:48:57,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:57,994 INFO L225 Difference]: With dead ends: 60 [2021-11-07 07:48:57,994 INFO L226 Difference]: Without dead ends: 56 [2021-11-07 07:48:57,995 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=361, Invalid=509, Unknown=0, NotChecked=0, Total=870 [2021-11-07 07:48:57,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-07 07:48:57,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-11-07 07:48:57,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:57,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-11-07 07:48:57,998 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2021-11-07 07:48:57,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:57,999 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-11-07 07:48:57,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:57,999 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-11-07 07:48:57,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 07:48:58,000 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:58,000 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:58,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:58,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-07 07:48:58,225 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:58,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:58,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1065425416, now seen corresponding path program 24 times [2021-11-07 07:48:58,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:58,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928378304] [2021-11-07 07:48:58,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:58,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:58,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:58,610 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:58,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:58,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928378304] [2021-11-07 07:48:58,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928378304] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:58,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016098267] [2021-11-07 07:48:58,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:48:58,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:58,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:58,612 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:58,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-07 07:48:58,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-11-07 07:48:58,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:48:58,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 07:48:58,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:48:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:59,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016098267] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:59,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:48:59,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-11-07 07:48:59,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057200998] [2021-11-07 07:48:59,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-07 07:48:59,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:48:59,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-07 07:48:59,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2021-11-07 07:48:59,105 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:59,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:48:59,147 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-11-07 07:48:59,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 07:48:59,148 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 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 54 [2021-11-07 07:48:59,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:48:59,148 INFO L225 Difference]: With dead ends: 62 [2021-11-07 07:48:59,148 INFO L226 Difference]: Without dead ends: 58 [2021-11-07 07:48:59,149 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=388, Invalid=542, Unknown=0, NotChecked=0, Total=930 [2021-11-07 07:48:59,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-07 07:48:59,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-11-07 07:48:59,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:59,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-11-07 07:48:59,152 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2021-11-07 07:48:59,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:48:59,152 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-11-07 07:48:59,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:48:59,153 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-11-07 07:48:59,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 07:48:59,153 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:48:59,153 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1] [2021-11-07 07:48:59,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-07 07:48:59,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:59,377 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:48:59,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:48:59,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1724751405, now seen corresponding path program 25 times [2021-11-07 07:48:59,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:48:59,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801232651] [2021-11-07 07:48:59,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:48:59,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:48:59,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:48:59,752 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:48:59,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:48:59,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801232651] [2021-11-07 07:48:59,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801232651] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:48:59,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193800081] [2021-11-07 07:48:59,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:48:59,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:48:59,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:48:59,754 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:48:59,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-07 07:49:00,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:00,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-07 07:49:00,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:00,287 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:00,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193800081] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:00,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:00,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-11-07 07:49:00,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773158842] [2021-11-07 07:49:00,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-07 07:49:00,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:00,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-07 07:49:00,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2021-11-07 07:49:00,289 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:00,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:00,358 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-11-07 07:49:00,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 07:49:00,359 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 07:49:00,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:00,359 INFO L225 Difference]: With dead ends: 64 [2021-11-07 07:49:00,359 INFO L226 Difference]: Without dead ends: 60 [2021-11-07 07:49:00,360 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=416, Invalid=576, Unknown=0, NotChecked=0, Total=992 [2021-11-07 07:49:00,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-07 07:49:00,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-11-07 07:49:00,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:00,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-11-07 07:49:00,363 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2021-11-07 07:49:00,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:00,364 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-11-07 07:49:00,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:00,364 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-11-07 07:49:00,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 07:49:00,365 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:00,365 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:00,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:00,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-07 07:49:00,581 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:00,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:00,581 INFO L85 PathProgramCache]: Analyzing trace with hash -318132974, now seen corresponding path program 26 times [2021-11-07 07:49:00,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:00,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181745891] [2021-11-07 07:49:00,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:00,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:00,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:00,985 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:00,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:00,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181745891] [2021-11-07 07:49:00,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181745891] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:00,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491713443] [2021-11-07 07:49:00,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:49:00,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:00,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:00,987 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:01,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 07:49:01,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:49:01,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:01,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 07:49:01,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:01,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491713443] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:01,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:01,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 32 [2021-11-07 07:49:01,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29258712] [2021-11-07 07:49:01,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-07 07:49:01,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:01,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-07 07:49:01,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2021-11-07 07:49:01,546 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:01,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:01,592 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-11-07 07:49:01,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 07:49:01,592 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 07:49:01,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:01,593 INFO L225 Difference]: With dead ends: 66 [2021-11-07 07:49:01,593 INFO L226 Difference]: Without dead ends: 62 [2021-11-07 07:49:01,593 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=611, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 07:49:01,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-07 07:49:01,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-11-07 07:49:01,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:01,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-11-07 07:49:01,596 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2021-11-07 07:49:01,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:01,597 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-11-07 07:49:01,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:01,597 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-11-07 07:49:01,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 07:49:01,598 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:01,598 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:01,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:01,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-07 07:49:01,813 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:01,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:01,813 INFO L85 PathProgramCache]: Analyzing trace with hash -729966921, now seen corresponding path program 27 times [2021-11-07 07:49:01,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:01,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254643808] [2021-11-07 07:49:01,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:01,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:01,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:02,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:02,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254643808] [2021-11-07 07:49:02,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254643808] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:02,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419628402] [2021-11-07 07:49:02,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:49:02,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:02,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:02,229 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:02,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-07 07:49:02,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-11-07 07:49:02,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:02,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-07 07:49:02,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:02,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419628402] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:02,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:02,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 33 [2021-11-07 07:49:02,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522696400] [2021-11-07 07:49:02,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-07 07:49:02,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:02,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-07 07:49:02,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 07:49:02,808 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:02,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:02,856 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-11-07 07:49:02,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 07:49:02,857 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 07:49:02,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:02,858 INFO L225 Difference]: With dead ends: 68 [2021-11-07 07:49:02,858 INFO L226 Difference]: Without dead ends: 64 [2021-11-07 07:49:02,860 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=475, Invalid=647, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 07:49:02,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-07 07:49:02,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-11-07 07:49:02,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:02,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-11-07 07:49:02,865 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2021-11-07 07:49:02,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:02,865 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-11-07 07:49:02,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:02,866 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-11-07 07:49:02,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 07:49:02,866 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:02,866 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:02,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:03,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-07 07:49:03,093 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:03,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:03,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1365398756, now seen corresponding path program 28 times [2021-11-07 07:49:03,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:03,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590783310] [2021-11-07 07:49:03,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:03,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:03,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:03,544 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:03,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:03,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590783310] [2021-11-07 07:49:03,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590783310] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:03,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732193525] [2021-11-07 07:49:03,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:49:03,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:03,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:03,548 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:03,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-07 07:49:03,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:49:03,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:03,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-07 07:49:03,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:04,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732193525] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:04,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:04,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 34 [2021-11-07 07:49:04,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696011162] [2021-11-07 07:49:04,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-07 07:49:04,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:04,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-07 07:49:04,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 07:49:04,092 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:04,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:04,147 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-11-07 07:49:04,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 07:49:04,148 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 07:49:04,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:04,148 INFO L225 Difference]: With dead ends: 70 [2021-11-07 07:49:04,148 INFO L226 Difference]: Without dead ends: 66 [2021-11-07 07:49:04,149 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=506, Invalid=684, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 07:49:04,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-07 07:49:04,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-11-07 07:49:04,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:04,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-11-07 07:49:04,152 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2021-11-07 07:49:04,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:04,152 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-11-07 07:49:04,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:04,152 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-11-07 07:49:04,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 07:49:04,152 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:04,153 INFO L513 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:04,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:04,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:04,353 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:04,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:04,353 INFO L85 PathProgramCache]: Analyzing trace with hash -2130036159, now seen corresponding path program 29 times [2021-11-07 07:49:04,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:04,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952338046] [2021-11-07 07:49:04,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:04,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:04,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:04,840 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:04,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:04,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952338046] [2021-11-07 07:49:04,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952338046] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:04,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185279126] [2021-11-07 07:49:04,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:49:04,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:04,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:04,845 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:04,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 07:49:05,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-11-07 07:49:05,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:05,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-07 07:49:05,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:05,453 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:05,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185279126] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:05,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:05,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-11-07 07:49:05,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195619795] [2021-11-07 07:49:05,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-07 07:49:05,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:05,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-07 07:49:05,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 07:49:05,455 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:05,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:05,504 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-11-07 07:49:05,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 07:49:05,505 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 07:49:05,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:05,505 INFO L225 Difference]: With dead ends: 72 [2021-11-07 07:49:05,506 INFO L226 Difference]: Without dead ends: 68 [2021-11-07 07:49:05,506 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=538, Invalid=722, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 07:49:05,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-07 07:49:05,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-11-07 07:49:05,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:05,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-11-07 07:49:05,509 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2021-11-07 07:49:05,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:05,509 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-11-07 07:49:05,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:05,510 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-11-07 07:49:05,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 07:49:05,510 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:05,510 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:05,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:05,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:05,733 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:05,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:05,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1787794470, now seen corresponding path program 30 times [2021-11-07 07:49:05,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:05,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737804246] [2021-11-07 07:49:05,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:05,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:06,248 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:06,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:06,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737804246] [2021-11-07 07:49:06,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737804246] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:06,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289826819] [2021-11-07 07:49:06,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:49:06,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:06,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:06,250 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:06,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-07 07:49:06,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-11-07 07:49:06,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:06,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-07 07:49:06,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:06,948 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:06,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289826819] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:06,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:06,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-11-07 07:49:06,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974860520] [2021-11-07 07:49:06,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-07 07:49:06,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:06,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-07 07:49:06,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 07:49:06,951 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:07,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:07,007 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-11-07 07:49:07,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 07:49:07,008 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 07:49:07,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:07,009 INFO L225 Difference]: With dead ends: 74 [2021-11-07 07:49:07,009 INFO L226 Difference]: Without dead ends: 70 [2021-11-07 07:49:07,011 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=571, Invalid=761, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 07:49:07,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-07 07:49:07,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-11-07 07:49:07,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:07,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-11-07 07:49:07,015 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2021-11-07 07:49:07,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:07,016 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-11-07 07:49:07,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:07,016 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-11-07 07:49:07,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 07:49:07,017 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:07,017 INFO L513 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:07,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:07,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-07 07:49:07,241 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:07,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:07,241 INFO L85 PathProgramCache]: Analyzing trace with hash 136710347, now seen corresponding path program 31 times [2021-11-07 07:49:07,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:07,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989971337] [2021-11-07 07:49:07,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:07,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:07,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:07,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:07,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989971337] [2021-11-07 07:49:07,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989971337] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:07,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862296002] [2021-11-07 07:49:07,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:49:07,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:07,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:07,817 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:07,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-07 07:49:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:08,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-07 07:49:08,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:08,594 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:08,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862296002] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:08,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:08,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-11-07 07:49:08,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25289968] [2021-11-07 07:49:08,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-07 07:49:08,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:08,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-07 07:49:08,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 07:49:08,598 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:08,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:08,657 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-11-07 07:49:08,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-07 07:49:08,658 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 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 68 [2021-11-07 07:49:08,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:08,659 INFO L225 Difference]: With dead ends: 76 [2021-11-07 07:49:08,659 INFO L226 Difference]: Without dead ends: 72 [2021-11-07 07:49:08,661 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=605, Invalid=801, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 07:49:08,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-07 07:49:08,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-11-07 07:49:08,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:08,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-11-07 07:49:08,664 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2021-11-07 07:49:08,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:08,665 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-11-07 07:49:08,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:08,665 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-11-07 07:49:08,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 07:49:08,666 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:08,666 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:08,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:08,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:08,893 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:08,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:08,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1712199632, now seen corresponding path program 32 times [2021-11-07 07:49:08,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:08,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24352522] [2021-11-07 07:49:08,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:08,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:08,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:09,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:09,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:09,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24352522] [2021-11-07 07:49:09,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24352522] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:09,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130053373] [2021-11-07 07:49:09,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:49:09,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:09,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:09,469 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:09,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 07:49:09,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:49:09,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:10,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-07 07:49:10,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:10,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:10,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130053373] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:10,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:10,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 38 [2021-11-07 07:49:10,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337258008] [2021-11-07 07:49:10,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-07 07:49:10,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:10,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-07 07:49:10,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 07:49:10,233 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:10,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:10,290 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-11-07 07:49:10,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-07 07:49:10,290 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 07:49:10,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:10,291 INFO L225 Difference]: With dead ends: 78 [2021-11-07 07:49:10,291 INFO L226 Difference]: Without dead ends: 74 [2021-11-07 07:49:10,292 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=640, Invalid=842, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 07:49:10,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-07 07:49:10,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-11-07 07:49:10,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:10,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-11-07 07:49:10,294 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2021-11-07 07:49:10,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:10,295 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-11-07 07:49:10,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:10,295 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-11-07 07:49:10,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 07:49:10,296 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:10,296 INFO L513 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:10,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:10,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:10,497 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:10,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:10,497 INFO L85 PathProgramCache]: Analyzing trace with hash -398228907, now seen corresponding path program 33 times [2021-11-07 07:49:10,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:10,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81688844] [2021-11-07 07:49:10,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:10,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:10,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:11,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:11,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:11,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81688844] [2021-11-07 07:49:11,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81688844] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:11,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261781364] [2021-11-07 07:49:11,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:49:11,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:11,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:11,105 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:11,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-07 07:49:11,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-11-07 07:49:11,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:11,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-07 07:49:11,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:11,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261781364] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:11,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:11,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-11-07 07:49:11,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178082819] [2021-11-07 07:49:11,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-07 07:49:11,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:11,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-07 07:49:11,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 07:49:11,924 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:11,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:11,986 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-11-07 07:49:11,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-07 07:49:11,988 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 07:49:11,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:11,988 INFO L225 Difference]: With dead ends: 80 [2021-11-07 07:49:11,989 INFO L226 Difference]: Without dead ends: 76 [2021-11-07 07:49:11,989 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=676, Invalid=884, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 07:49:11,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-07 07:49:11,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-11-07 07:49:11,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:11,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-11-07 07:49:11,993 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2021-11-07 07:49:11,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:11,994 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-11-07 07:49:11,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:11,994 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-11-07 07:49:11,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 07:49:11,995 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:11,995 INFO L513 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:12,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-07 07:49:12,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-07 07:49:12,209 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:12,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:12,209 INFO L85 PathProgramCache]: Analyzing trace with hash -392747206, now seen corresponding path program 34 times [2021-11-07 07:49:12,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:12,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106160831] [2021-11-07 07:49:12,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:12,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:12,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:12,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:12,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106160831] [2021-11-07 07:49:12,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106160831] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:12,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695926885] [2021-11-07 07:49:12,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:49:12,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:12,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:12,842 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:12,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-07 07:49:13,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:49:13,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:13,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-07 07:49:13,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:13,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:13,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695926885] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:13,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:13,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2021-11-07 07:49:13,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529226650] [2021-11-07 07:49:13,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-07 07:49:13,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:13,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-07 07:49:13,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 07:49:13,625 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:13,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:13,680 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-11-07 07:49:13,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-07 07:49:13,681 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 07:49:13,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:13,682 INFO L225 Difference]: With dead ends: 82 [2021-11-07 07:49:13,682 INFO L226 Difference]: Without dead ends: 78 [2021-11-07 07:49:13,683 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=713, Invalid=927, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 07:49:13,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-07 07:49:13,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-11-07 07:49:13,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:13,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-11-07 07:49:13,686 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2021-11-07 07:49:13,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:13,687 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-11-07 07:49:13,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:13,687 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-11-07 07:49:13,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 07:49:13,688 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:13,688 INFO L513 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:13,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-07 07:49:13,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-07 07:49:13,912 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:13,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:13,912 INFO L85 PathProgramCache]: Analyzing trace with hash 580200159, now seen corresponding path program 35 times [2021-11-07 07:49:13,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:13,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860451445] [2021-11-07 07:49:13,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:13,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:14,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:14,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860451445] [2021-11-07 07:49:14,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860451445] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:14,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615668030] [2021-11-07 07:49:14,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:49:14,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:14,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:14,485 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:14,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-07 07:49:15,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-11-07 07:49:15,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:15,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-07 07:49:15,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:15,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615668030] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:15,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:15,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 41 [2021-11-07 07:49:15,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619346318] [2021-11-07 07:49:15,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-07 07:49:15,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:15,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-07 07:49:15,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=894, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 07:49:15,276 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:15,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:15,337 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-11-07 07:49:15,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-07 07:49:15,338 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 07:49:15,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:15,339 INFO L225 Difference]: With dead ends: 84 [2021-11-07 07:49:15,339 INFO L226 Difference]: Without dead ends: 80 [2021-11-07 07:49:15,340 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=751, Invalid=971, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 07:49:15,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-07 07:49:15,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-11-07 07:49:15,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:15,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-11-07 07:49:15,343 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2021-11-07 07:49:15,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:15,344 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-11-07 07:49:15,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:15,344 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-11-07 07:49:15,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 07:49:15,345 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:15,345 INFO L513 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:15,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:15,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-07 07:49:15,565 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:15,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:15,565 INFO L85 PathProgramCache]: Analyzing trace with hash -720252604, now seen corresponding path program 36 times [2021-11-07 07:49:15,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:15,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481909690] [2021-11-07 07:49:15,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:15,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:16,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:16,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:16,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481909690] [2021-11-07 07:49:16,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481909690] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:16,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825456128] [2021-11-07 07:49:16,180 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:49:16,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:16,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:16,183 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:16,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-07 07:49:16,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-11-07 07:49:16,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:16,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-07 07:49:16,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:16,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825456128] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:16,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:16,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 42 [2021-11-07 07:49:16,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693735123] [2021-11-07 07:49:16,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-07 07:49:16,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:16,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-07 07:49:16,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 07:49:16,942 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 42 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:16,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:16,997 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-11-07 07:49:16,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-07 07:49:16,997 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 42 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-07 07:49:16,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:16,998 INFO L225 Difference]: With dead ends: 86 [2021-11-07 07:49:16,998 INFO L226 Difference]: Without dead ends: 82 [2021-11-07 07:49:16,998 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=790, Invalid=1016, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 07:49:16,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-07 07:49:17,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-11-07 07:49:17,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:17,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-11-07 07:49:17,002 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2021-11-07 07:49:17,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:17,002 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-11-07 07:49:17,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 42 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:17,003 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-11-07 07:49:17,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 07:49:17,003 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:17,003 INFO L513 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:17,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-11-07 07:49:17,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-07 07:49:17,209 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:17,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:17,209 INFO L85 PathProgramCache]: Analyzing trace with hash -619874711, now seen corresponding path program 37 times [2021-11-07 07:49:17,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:17,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017152746] [2021-11-07 07:49:17,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:17,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:17,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:17,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:17,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:17,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017152746] [2021-11-07 07:49:17,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017152746] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:17,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641933215] [2021-11-07 07:49:17,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:49:17,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:17,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:17,941 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:17,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-07 07:49:18,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:18,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-07 07:49:18,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:18,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:18,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641933215] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:18,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:18,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2021-11-07 07:49:18,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451844776] [2021-11-07 07:49:18,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-07 07:49:18,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:18,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-07 07:49:18,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=981, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 07:49:18,839 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:18,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:18,910 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-11-07 07:49:18,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-07 07:49:18,910 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-07 07:49:18,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:18,911 INFO L225 Difference]: With dead ends: 88 [2021-11-07 07:49:18,912 INFO L226 Difference]: Without dead ends: 84 [2021-11-07 07:49:18,912 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=830, Invalid=1062, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 07:49:18,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-07 07:49:18,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-11-07 07:49:18,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:18,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-11-07 07:49:18,917 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2021-11-07 07:49:18,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:18,917 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-11-07 07:49:18,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:18,917 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-11-07 07:49:18,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 07:49:18,918 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:18,918 INFO L513 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:18,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:19,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-07 07:49:19,133 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:19,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:19,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1353999950, now seen corresponding path program 38 times [2021-11-07 07:49:19,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:19,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411846403] [2021-11-07 07:49:19,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:19,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:19,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:19,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:19,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411846403] [2021-11-07 07:49:19,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411846403] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:19,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65730615] [2021-11-07 07:49:19,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:49:19,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:19,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:19,793 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:19,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-07 07:49:20,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:49:20,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:20,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-07 07:49:20,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:20,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:20,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65730615] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:20,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:20,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 44 [2021-11-07 07:49:20,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999114015] [2021-11-07 07:49:20,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-07 07:49:20,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:20,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-07 07:49:20,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 07:49:20,645 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:20,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:20,714 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-11-07 07:49:20,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-07 07:49:20,714 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 07:49:20,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:20,715 INFO L225 Difference]: With dead ends: 90 [2021-11-07 07:49:20,716 INFO L226 Difference]: Without dead ends: 86 [2021-11-07 07:49:20,717 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=871, Invalid=1109, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 07:49:20,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-07 07:49:20,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-11-07 07:49:20,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:20,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-11-07 07:49:20,720 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2021-11-07 07:49:20,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:20,720 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-11-07 07:49:20,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:20,721 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-11-07 07:49:20,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 07:49:20,721 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:20,721 INFO L513 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:20,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:20,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-07 07:49:20,937 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:20,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:20,937 INFO L85 PathProgramCache]: Analyzing trace with hash -127995661, now seen corresponding path program 39 times [2021-11-07 07:49:20,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:20,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129359235] [2021-11-07 07:49:20,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:20,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:20,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:21,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:21,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:21,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129359235] [2021-11-07 07:49:21,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129359235] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:21,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513647589] [2021-11-07 07:49:21,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:49:21,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:21,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:21,650 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:21,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-07 07:49:22,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-11-07 07:49:22,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:22,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-07 07:49:22,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:22,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:22,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513647589] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:22,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:22,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 45 [2021-11-07 07:49:22,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184818170] [2021-11-07 07:49:22,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-07 07:49:22,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:22,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-07 07:49:22,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=1072, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 07:49:22,546 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:22,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:22,597 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-11-07 07:49:22,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-07 07:49:22,598 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 07:49:22,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:22,603 INFO L225 Difference]: With dead ends: 92 [2021-11-07 07:49:22,603 INFO L226 Difference]: Without dead ends: 88 [2021-11-07 07:49:22,604 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=913, Invalid=1157, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 07:49:22,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-07 07:49:22,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-11-07 07:49:22,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:22,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-11-07 07:49:22,608 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2021-11-07 07:49:22,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:22,608 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-11-07 07:49:22,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:22,608 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-11-07 07:49:22,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 07:49:22,609 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:22,609 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:22,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-07 07:49:22,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-07 07:49:22,813 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:22,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:22,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1603364440, now seen corresponding path program 40 times [2021-11-07 07:49:22,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:22,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66526422] [2021-11-07 07:49:22,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:22,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:22,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:23,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:23,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:23,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66526422] [2021-11-07 07:49:23,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66526422] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:23,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025511001] [2021-11-07 07:49:23,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:49:23,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:23,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:23,676 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:23,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-07 07:49:24,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:49:24,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:24,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-07 07:49:24,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:24,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025511001] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:24,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:24,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 46 [2021-11-07 07:49:24,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670473356] [2021-11-07 07:49:24,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-07 07:49:24,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:24,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-07 07:49:24,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 07:49:24,578 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:24,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:24,650 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-11-07 07:49:24,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-07 07:49:24,650 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-07 07:49:24,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:24,651 INFO L225 Difference]: With dead ends: 94 [2021-11-07 07:49:24,652 INFO L226 Difference]: Without dead ends: 90 [2021-11-07 07:49:24,652 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=956, Invalid=1206, Unknown=0, NotChecked=0, Total=2162 [2021-11-07 07:49:24,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-07 07:49:24,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-11-07 07:49:24,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:24,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-11-07 07:49:24,656 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2021-11-07 07:49:24,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:24,656 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-11-07 07:49:24,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:24,656 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-11-07 07:49:24,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 07:49:24,657 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:24,657 INFO L513 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:24,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:24,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:24,873 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:24,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:24,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1006889347, now seen corresponding path program 41 times [2021-11-07 07:49:24,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:24,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893203841] [2021-11-07 07:49:24,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:24,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:25,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:25,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:25,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893203841] [2021-11-07 07:49:25,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893203841] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:25,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784646606] [2021-11-07 07:49:25,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:49:25,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:25,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:25,756 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:25,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-07 07:49:26,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-11-07 07:49:26,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:26,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-07 07:49:26,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:26,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:26,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784646606] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:26,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:26,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 47 [2021-11-07 07:49:26,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831952846] [2021-11-07 07:49:26,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-07 07:49:26,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:26,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-07 07:49:26,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=995, Invalid=1167, Unknown=0, NotChecked=0, Total=2162 [2021-11-07 07:49:26,825 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 47 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:26,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:26,882 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-11-07 07:49:26,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-07 07:49:26,882 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 47 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-07 07:49:26,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:26,883 INFO L225 Difference]: With dead ends: 96 [2021-11-07 07:49:26,883 INFO L226 Difference]: Without dead ends: 92 [2021-11-07 07:49:26,883 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1000, Invalid=1256, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 07:49:26,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-07 07:49:26,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-11-07 07:49:26,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:26,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2021-11-07 07:49:26,887 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2021-11-07 07:49:26,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:26,887 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2021-11-07 07:49:26,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 47 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:26,888 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2021-11-07 07:49:26,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 07:49:26,888 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:26,888 INFO L513 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:26,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:27,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:27,097 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:27,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:27,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1199877790, now seen corresponding path program 42 times [2021-11-07 07:49:27,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:27,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127588905] [2021-11-07 07:49:27,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:27,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:27,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:27,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:27,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127588905] [2021-11-07 07:49:27,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127588905] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:27,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723732565] [2021-11-07 07:49:27,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:49:27,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:27,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:27,893 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:27,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-07 07:49:28,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-11-07 07:49:28,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:28,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-07 07:49:28,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:28,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:28,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723732565] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:28,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:28,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 48 [2021-11-07 07:49:28,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160577780] [2021-11-07 07:49:28,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-07 07:49:28,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:28,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-07 07:49:28,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 07:49:28,883 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 48 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:28,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:28,969 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-11-07 07:49:28,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-07 07:49:28,969 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 48 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-07 07:49:28,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:28,970 INFO L225 Difference]: With dead ends: 98 [2021-11-07 07:49:28,970 INFO L226 Difference]: Without dead ends: 94 [2021-11-07 07:49:28,972 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1045, Invalid=1307, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 07:49:28,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-07 07:49:28,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-11-07 07:49:28,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:28,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-11-07 07:49:28,976 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2021-11-07 07:49:28,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:28,976 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-11-07 07:49:28,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 48 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:28,977 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-11-07 07:49:28,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 07:49:28,978 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:28,978 INFO L513 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:29,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:29,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-07 07:49:29,204 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:29,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:29,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1978177785, now seen corresponding path program 43 times [2021-11-07 07:49:29,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:29,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235419104] [2021-11-07 07:49:29,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:29,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:30,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:30,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235419104] [2021-11-07 07:49:30,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235419104] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:30,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130348550] [2021-11-07 07:49:30,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:49:30,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:30,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:30,054 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:30,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-07 07:49:30,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:30,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-07 07:49:30,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:31,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130348550] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:31,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:31,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 49 [2021-11-07 07:49:31,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407515278] [2021-11-07 07:49:31,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-07 07:49:31,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:31,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-07 07:49:31,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=1266, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 07:49:31,041 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 49 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:31,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:31,097 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-11-07 07:49:31,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-07 07:49:31,097 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 49 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-07 07:49:31,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:31,098 INFO L225 Difference]: With dead ends: 100 [2021-11-07 07:49:31,098 INFO L226 Difference]: Without dead ends: 96 [2021-11-07 07:49:31,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1091, Invalid=1359, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 07:49:31,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-07 07:49:31,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-11-07 07:49:31,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:31,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-11-07 07:49:31,102 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2021-11-07 07:49:31,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:31,102 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-11-07 07:49:31,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 49 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:31,102 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-11-07 07:49:31,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 07:49:31,103 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:31,103 INFO L513 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:31,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:31,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-07 07:49:31,309 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:31,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:31,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1694803820, now seen corresponding path program 44 times [2021-11-07 07:49:31,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:31,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239812213] [2021-11-07 07:49:31,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:31,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:31,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:32,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:32,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239812213] [2021-11-07 07:49:32,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239812213] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:32,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656221516] [2021-11-07 07:49:32,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:49:32,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:32,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:32,194 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:32,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-07 07:49:32,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:49:32,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:32,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-07 07:49:32,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:33,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:33,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656221516] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:33,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:33,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 50 [2021-11-07 07:49:33,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672104366] [2021-11-07 07:49:33,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-07 07:49:33,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:33,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-07 07:49:33,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 07:49:33,239 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 50 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:33,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:33,302 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-11-07 07:49:33,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-07 07:49:33,302 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-07 07:49:33,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:33,303 INFO L225 Difference]: With dead ends: 102 [2021-11-07 07:49:33,303 INFO L226 Difference]: Without dead ends: 98 [2021-11-07 07:49:33,303 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1138, Invalid=1412, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 07:49:33,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-07 07:49:33,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-11-07 07:49:33,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:33,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2021-11-07 07:49:33,307 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2021-11-07 07:49:33,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:33,307 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2021-11-07 07:49:33,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:33,308 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2021-11-07 07:49:33,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 07:49:33,308 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:33,308 INFO L513 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:33,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:33,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:33,529 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:33,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:33,529 INFO L85 PathProgramCache]: Analyzing trace with hash 967008913, now seen corresponding path program 45 times [2021-11-07 07:49:33,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:33,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823540591] [2021-11-07 07:49:33,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:33,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:34,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:34,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:34,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823540591] [2021-11-07 07:49:34,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823540591] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:34,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758734488] [2021-11-07 07:49:34,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:49:34,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:34,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:34,380 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:34,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-07 07:49:35,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-11-07 07:49:35,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:35,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-07 07:49:35,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:35,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:35,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758734488] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:35,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:35,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 51 [2021-11-07 07:49:35,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431100490] [2021-11-07 07:49:35,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-07 07:49:35,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:35,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-07 07:49:35,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1181, Invalid=1369, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 07:49:35,529 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 51 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:35,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:35,603 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-11-07 07:49:35,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-07 07:49:35,604 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 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 96 [2021-11-07 07:49:35,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:35,605 INFO L225 Difference]: With dead ends: 104 [2021-11-07 07:49:35,605 INFO L226 Difference]: Without dead ends: 100 [2021-11-07 07:49:35,606 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1186, Invalid=1466, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 07:49:35,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-07 07:49:35,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-11-07 07:49:35,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:35,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-11-07 07:49:35,610 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2021-11-07 07:49:35,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:35,610 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-11-07 07:49:35,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:35,611 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-11-07 07:49:35,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 07:49:35,612 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:35,612 INFO L513 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:35,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-11-07 07:49:35,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-07 07:49:35,833 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:35,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:35,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1635772534, now seen corresponding path program 46 times [2021-11-07 07:49:35,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:35,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030346728] [2021-11-07 07:49:35,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:35,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:35,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:36,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:36,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030346728] [2021-11-07 07:49:36,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030346728] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:36,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318730488] [2021-11-07 07:49:36,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:49:36,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:36,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:36,893 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:36,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-07 07:49:37,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:49:37,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:37,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-07 07:49:37,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:37,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318730488] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:37,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:37,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 52 [2021-11-07 07:49:37,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757029972] [2021-11-07 07:49:37,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-07 07:49:37,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:37,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-07 07:49:37,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 07:49:37,975 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 52 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:38,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:38,079 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2021-11-07 07:49:38,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-07 07:49:38,080 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 52 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-07 07:49:38,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:38,081 INFO L225 Difference]: With dead ends: 106 [2021-11-07 07:49:38,081 INFO L226 Difference]: Without dead ends: 102 [2021-11-07 07:49:38,082 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1235, Invalid=1521, Unknown=0, NotChecked=0, Total=2756 [2021-11-07 07:49:38,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-07 07:49:38,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-11-07 07:49:38,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:38,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2021-11-07 07:49:38,085 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2021-11-07 07:49:38,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:38,086 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2021-11-07 07:49:38,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 52 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:38,086 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2021-11-07 07:49:38,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 07:49:38,087 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:38,087 INFO L513 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:38,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:38,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:38,313 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:38,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:38,313 INFO L85 PathProgramCache]: Analyzing trace with hash 72517915, now seen corresponding path program 47 times [2021-11-07 07:49:38,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:38,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289880015] [2021-11-07 07:49:38,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:38,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:38,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:39,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:39,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:39,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289880015] [2021-11-07 07:49:39,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289880015] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:39,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271908568] [2021-11-07 07:49:39,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:49:39,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:39,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:39,362 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:39,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-07 07:49:40,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2021-11-07 07:49:40,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:40,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-07 07:49:40,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:40,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271908568] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:40,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:40,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 53 [2021-11-07 07:49:40,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103400529] [2021-11-07 07:49:40,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-07 07:49:40,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:40,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-07 07:49:40,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1280, Invalid=1476, Unknown=0, NotChecked=0, Total=2756 [2021-11-07 07:49:40,507 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:40,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:40,588 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2021-11-07 07:49:40,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-07 07:49:40,589 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-07 07:49:40,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:40,590 INFO L225 Difference]: With dead ends: 108 [2021-11-07 07:49:40,590 INFO L226 Difference]: Without dead ends: 104 [2021-11-07 07:49:40,591 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1285, Invalid=1577, Unknown=0, NotChecked=0, Total=2862 [2021-11-07 07:49:40,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-07 07:49:40,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-11-07 07:49:40,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 102 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:40,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2021-11-07 07:49:40,595 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2021-11-07 07:49:40,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:40,595 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2021-11-07 07:49:40,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:40,595 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2021-11-07 07:49:40,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 07:49:40,596 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:40,596 INFO L513 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:40,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:40,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-07 07:49:40,817 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:40,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:40,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1023382656, now seen corresponding path program 48 times [2021-11-07 07:49:40,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:40,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492447547] [2021-11-07 07:49:40,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:40,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:40,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:41,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:41,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:41,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492447547] [2021-11-07 07:49:41,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492447547] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:41,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41865486] [2021-11-07 07:49:41,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:49:41,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:41,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:41,843 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:41,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-07 07:49:42,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-11-07 07:49:42,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:42,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-07 07:49:42,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:43,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:43,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41865486] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:43,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:43,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 54 [2021-11-07 07:49:43,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257927342] [2021-11-07 07:49:43,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-07 07:49:43,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:43,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-07 07:49:43,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2021-11-07 07:49:43,058 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 54 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 54 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:43,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:43,123 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2021-11-07 07:49:43,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-07 07:49:43,124 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 54 states have internal predecessors, (107), 0 states have call successors, (0), 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 102 [2021-11-07 07:49:43,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:43,125 INFO L225 Difference]: With dead ends: 110 [2021-11-07 07:49:43,125 INFO L226 Difference]: Without dead ends: 106 [2021-11-07 07:49:43,126 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1336, Invalid=1634, Unknown=0, NotChecked=0, Total=2970 [2021-11-07 07:49:43,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-07 07:49:43,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-11-07 07:49:43,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0096153846153846) internal successors, (105), 104 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:43,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2021-11-07 07:49:43,130 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2021-11-07 07:49:43,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:43,130 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2021-11-07 07:49:43,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 54 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:43,131 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2021-11-07 07:49:43,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-07 07:49:43,131 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:43,131 INFO L513 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:43,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:43,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-07 07:49:43,353 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:43,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:43,353 INFO L85 PathProgramCache]: Analyzing trace with hash -23635291, now seen corresponding path program 49 times [2021-11-07 07:49:43,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:43,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380143506] [2021-11-07 07:49:43,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:43,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:43,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:44,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:44,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:44,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380143506] [2021-11-07 07:49:44,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380143506] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:44,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584629732] [2021-11-07 07:49:44,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:49:44,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:44,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:44,369 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:44,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-07 07:49:45,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:45,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-07 07:49:45,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:45,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584629732] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:45,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:45,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 55 [2021-11-07 07:49:45,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149814585] [2021-11-07 07:49:45,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-07 07:49:45,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:45,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-07 07:49:45,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1383, Invalid=1587, Unknown=0, NotChecked=0, Total=2970 [2021-11-07 07:49:45,561 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:45,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:45,645 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2021-11-07 07:49:45,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-07 07:49:45,646 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-07 07:49:45,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:45,647 INFO L225 Difference]: With dead ends: 112 [2021-11-07 07:49:45,647 INFO L226 Difference]: Without dead ends: 108 [2021-11-07 07:49:45,648 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1388, Invalid=1692, Unknown=0, NotChecked=0, Total=3080 [2021-11-07 07:49:45,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-07 07:49:45,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-11-07 07:49:45,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.009433962264151) internal successors, (107), 106 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:45,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2021-11-07 07:49:45,652 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2021-11-07 07:49:45,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:45,652 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2021-11-07 07:49:45,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:45,653 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2021-11-07 07:49:45,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 07:49:45,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:45,654 INFO L513 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:45,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:45,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:45,877 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:45,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:45,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1185535094, now seen corresponding path program 50 times [2021-11-07 07:49:45,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:45,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731769914] [2021-11-07 07:49:45,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:45,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:45,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:46,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:46,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:46,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731769914] [2021-11-07 07:49:46,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731769914] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:46,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652310738] [2021-11-07 07:49:46,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:49:46,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:46,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:46,948 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:46,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-07 07:49:47,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:49:47,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:47,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-07 07:49:47,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:48,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:48,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652310738] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:48,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:48,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 56 [2021-11-07 07:49:48,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452953482] [2021-11-07 07:49:48,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-07 07:49:48,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:48,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-07 07:49:48,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1436, Invalid=1644, Unknown=0, NotChecked=0, Total=3080 [2021-11-07 07:49:48,231 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 56 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:48,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:48,328 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2021-11-07 07:49:48,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-07 07:49:48,329 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 56 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-07 07:49:48,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:48,330 INFO L225 Difference]: With dead ends: 114 [2021-11-07 07:49:48,330 INFO L226 Difference]: Without dead ends: 110 [2021-11-07 07:49:48,331 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1441, Invalid=1751, Unknown=0, NotChecked=0, Total=3192 [2021-11-07 07:49:48,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-07 07:49:48,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-11-07 07:49:48,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0092592592592593) internal successors, (109), 108 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:48,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2021-11-07 07:49:48,336 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2021-11-07 07:49:48,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:48,336 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2021-11-07 07:49:48,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 56 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:48,337 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2021-11-07 07:49:48,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-07 07:49:48,337 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:48,338 INFO L513 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:48,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:48,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:48,565 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:48,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:48,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1079748817, now seen corresponding path program 51 times [2021-11-07 07:49:48,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:48,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818868889] [2021-11-07 07:49:48,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:48,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:48,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:49,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:49,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:49,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818868889] [2021-11-07 07:49:49,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818868889] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:49,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55408794] [2021-11-07 07:49:49,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:49:49,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:49,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:49,651 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:49,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-07 07:49:50,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2021-11-07 07:49:50,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:50,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-07 07:49:50,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:50,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:50,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55408794] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:50,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:50,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 57 [2021-11-07 07:49:50,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047931542] [2021-11-07 07:49:50,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-07 07:49:50,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:50,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-07 07:49:50,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1490, Invalid=1702, Unknown=0, NotChecked=0, Total=3192 [2021-11-07 07:49:50,954 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:51,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:51,022 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2021-11-07 07:49:51,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-07 07:49:51,022 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-11-07 07:49:51,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:51,023 INFO L225 Difference]: With dead ends: 116 [2021-11-07 07:49:51,023 INFO L226 Difference]: Without dead ends: 112 [2021-11-07 07:49:51,023 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1495, Invalid=1811, Unknown=0, NotChecked=0, Total=3306 [2021-11-07 07:49:51,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-07 07:49:51,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-11-07 07:49:51,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.009090909090909) internal successors, (111), 110 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:51,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2021-11-07 07:49:51,027 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2021-11-07 07:49:51,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:51,028 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2021-11-07 07:49:51,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:51,028 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2021-11-07 07:49:51,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-07 07:49:51,029 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:51,029 INFO L513 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:51,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:51,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:51,234 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:51,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:51,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1796615572, now seen corresponding path program 52 times [2021-11-07 07:49:51,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:51,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923754724] [2021-11-07 07:49:51,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:51,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:51,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:52,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:52,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:52,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923754724] [2021-11-07 07:49:52,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923754724] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:52,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832021413] [2021-11-07 07:49:52,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:49:52,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:52,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:52,380 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:52,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-07 07:49:53,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:49:53,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:53,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-07 07:49:53,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:53,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:53,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832021413] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:53,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:53,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 58 [2021-11-07 07:49:53,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106498169] [2021-11-07 07:49:53,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-07 07:49:53,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:53,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-07 07:49:53,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1545, Invalid=1761, Unknown=0, NotChecked=0, Total=3306 [2021-11-07 07:49:53,664 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand has 58 states, 58 states have (on average 1.9827586206896552) internal successors, (115), 58 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:53,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:53,767 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2021-11-07 07:49:53,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-07 07:49:53,767 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9827586206896552) internal successors, (115), 58 states have internal predecessors, (115), 0 states have call successors, (0), 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 110 [2021-11-07 07:49:53,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:53,768 INFO L225 Difference]: With dead ends: 118 [2021-11-07 07:49:53,768 INFO L226 Difference]: Without dead ends: 114 [2021-11-07 07:49:53,769 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1550, Invalid=1872, Unknown=0, NotChecked=0, Total=3422 [2021-11-07 07:49:53,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-07 07:49:53,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-11-07 07:49:53,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0089285714285714) internal successors, (113), 112 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:53,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2021-11-07 07:49:53,773 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2021-11-07 07:49:53,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:53,773 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2021-11-07 07:49:53,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9827586206896552) internal successors, (115), 58 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:53,773 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2021-11-07 07:49:53,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-07 07:49:53,774 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:53,774 INFO L513 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:53,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:53,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-11-07 07:49:53,989 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:53,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:53,989 INFO L85 PathProgramCache]: Analyzing trace with hash 23854777, now seen corresponding path program 53 times [2021-11-07 07:49:53,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:53,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815671450] [2021-11-07 07:49:53,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:53,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:55,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:55,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:55,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815671450] [2021-11-07 07:49:55,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815671450] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:55,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942179556] [2021-11-07 07:49:55,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:49:55,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:55,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:55,344 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:55,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-07 07:49:56,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2021-11-07 07:49:56,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:56,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-07 07:49:56,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:56,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:56,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942179556] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:56,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:56,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 59 [2021-11-07 07:49:56,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205608066] [2021-11-07 07:49:56,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-07 07:49:56,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:56,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-07 07:49:56,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=1821, Unknown=0, NotChecked=0, Total=3422 [2021-11-07 07:49:56,739 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 59 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:56,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:56,827 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2021-11-07 07:49:56,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-07 07:49:56,827 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 59 states have internal predecessors, (117), 0 states have call successors, (0), 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 112 [2021-11-07 07:49:56,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:56,829 INFO L225 Difference]: With dead ends: 120 [2021-11-07 07:49:56,829 INFO L226 Difference]: Without dead ends: 116 [2021-11-07 07:49:56,830 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1606, Invalid=1934, Unknown=0, NotChecked=0, Total=3540 [2021-11-07 07:49:56,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-07 07:49:56,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-11-07 07:49:56,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0087719298245614) internal successors, (115), 114 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:56,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2021-11-07 07:49:56,835 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2021-11-07 07:49:56,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:56,835 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2021-11-07 07:49:56,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 59 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:56,836 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2021-11-07 07:49:56,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-07 07:49:56,836 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:56,837 INFO L513 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:56,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-07 07:49:57,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:57,065 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:49:57,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:49:57,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1502747294, now seen corresponding path program 54 times [2021-11-07 07:49:57,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:49:57,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37899648] [2021-11-07 07:49:57,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:49:57,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:49:57,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:49:58,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:58,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:49:58,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37899648] [2021-11-07 07:49:58,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37899648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:58,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211637639] [2021-11-07 07:49:58,228 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:49:58,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:49:58,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:49:58,253 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:49:58,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-07 07:49:59,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2021-11-07 07:49:59,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:49:59,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-07 07:49:59,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:49:59,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:49:59,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211637639] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:49:59,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:49:59,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 60 [2021-11-07 07:49:59,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36342103] [2021-11-07 07:49:59,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-07 07:49:59,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:49:59,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-07 07:49:59,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1658, Invalid=1882, Unknown=0, NotChecked=0, Total=3540 [2021-11-07 07:49:59,706 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:59,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:49:59,788 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2021-11-07 07:49:59,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-07 07:49:59,788 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-07 07:49:59,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:49:59,790 INFO L225 Difference]: With dead ends: 122 [2021-11-07 07:49:59,790 INFO L226 Difference]: Without dead ends: 118 [2021-11-07 07:49:59,790 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1663, Invalid=1997, Unknown=0, NotChecked=0, Total=3660 [2021-11-07 07:49:59,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-07 07:49:59,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2021-11-07 07:49:59,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0086206896551724) internal successors, (117), 116 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:59,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2021-11-07 07:49:59,794 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2021-11-07 07:49:59,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:49:59,795 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2021-11-07 07:49:59,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:49:59,795 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2021-11-07 07:49:59,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-07 07:49:59,796 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:49:59,796 INFO L513 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1] [2021-11-07 07:49:59,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-07 07:50:00,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:00,009 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:50:00,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:00,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1084281155, now seen corresponding path program 55 times [2021-11-07 07:50:00,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:00,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567540100] [2021-11-07 07:50:00,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:00,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:01,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:01,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:01,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567540100] [2021-11-07 07:50:01,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567540100] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:01,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052214025] [2021-11-07 07:50:01,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:50:01,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:01,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:01,202 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:01,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-07 07:50:02,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:02,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-07 07:50:02,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:02,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:02,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052214025] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:02,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:02,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 61 [2021-11-07 07:50:02,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131068289] [2021-11-07 07:50:02,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-07 07:50:02,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:02,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-07 07:50:02,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1716, Invalid=1944, Unknown=0, NotChecked=0, Total=3660 [2021-11-07 07:50:02,600 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 61 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:02,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:50:02,675 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2021-11-07 07:50:02,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-07 07:50:02,675 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 61 states have internal predecessors, (121), 0 states have call successors, (0), 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 116 [2021-11-07 07:50:02,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:50:02,676 INFO L225 Difference]: With dead ends: 124 [2021-11-07 07:50:02,676 INFO L226 Difference]: Without dead ends: 120 [2021-11-07 07:50:02,677 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1721, Invalid=2061, Unknown=0, NotChecked=0, Total=3782 [2021-11-07 07:50:02,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-07 07:50:02,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2021-11-07 07:50:02,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0084745762711864) internal successors, (119), 118 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:02,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2021-11-07 07:50:02,681 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2021-11-07 07:50:02,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:50:02,681 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2021-11-07 07:50:02,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 61 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:02,682 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2021-11-07 07:50:02,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 07:50:02,682 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:50:02,683 INFO L513 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:02,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-11-07 07:50:02,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-07 07:50:02,897 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:50:02,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:02,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1629719896, now seen corresponding path program 56 times [2021-11-07 07:50:02,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:02,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774374006] [2021-11-07 07:50:02,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:02,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:04,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:04,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774374006] [2021-11-07 07:50:04,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774374006] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:04,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730550457] [2021-11-07 07:50:04,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:50:04,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:04,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:04,103 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:04,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-07 07:50:05,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:50:05,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:05,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-07 07:50:05,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:05,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:05,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730550457] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:05,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:05,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 62 [2021-11-07 07:50:05,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702265633] [2021-11-07 07:50:05,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-07 07:50:05,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:05,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-07 07:50:05,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1775, Invalid=2007, Unknown=0, NotChecked=0, Total=3782 [2021-11-07 07:50:05,598 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand has 62 states, 62 states have (on average 1.9838709677419355) internal successors, (123), 62 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:05,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:50:05,680 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2021-11-07 07:50:05,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-07 07:50:05,680 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.9838709677419355) internal successors, (123), 62 states have internal predecessors, (123), 0 states have call successors, (0), 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 118 [2021-11-07 07:50:05,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:50:05,681 INFO L225 Difference]: With dead ends: 126 [2021-11-07 07:50:05,681 INFO L226 Difference]: Without dead ends: 122 [2021-11-07 07:50:05,681 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1780, Invalid=2126, Unknown=0, NotChecked=0, Total=3906 [2021-11-07 07:50:05,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-07 07:50:05,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2021-11-07 07:50:05,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0083333333333333) internal successors, (121), 120 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:05,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2021-11-07 07:50:05,685 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2021-11-07 07:50:05,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:50:05,685 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2021-11-07 07:50:05,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.9838709677419355) internal successors, (123), 62 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:05,686 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2021-11-07 07:50:05,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-07 07:50:05,687 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:50:05,687 INFO L513 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:05,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-07 07:50:05,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-07 07:50:05,909 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:50:05,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:05,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1555386061, now seen corresponding path program 57 times [2021-11-07 07:50:05,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:05,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184647852] [2021-11-07 07:50:05,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:05,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:05,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:07,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:07,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:07,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184647852] [2021-11-07 07:50:07,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184647852] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:07,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729024847] [2021-11-07 07:50:07,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:50:07,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:07,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:07,272 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:07,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-07 07:50:08,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2021-11-07 07:50:08,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:08,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-07 07:50:08,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:08,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:08,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729024847] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:08,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:08,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 63 [2021-11-07 07:50:08,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566606171] [2021-11-07 07:50:08,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-07 07:50:08,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:08,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-07 07:50:08,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1835, Invalid=2071, Unknown=0, NotChecked=0, Total=3906 [2021-11-07 07:50:08,869 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 63 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:08,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:50:08,985 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2021-11-07 07:50:08,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-07 07:50:08,986 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 63 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-11-07 07:50:08,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:50:08,992 INFO L225 Difference]: With dead ends: 128 [2021-11-07 07:50:08,992 INFO L226 Difference]: Without dead ends: 124 [2021-11-07 07:50:08,993 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1840, Invalid=2192, Unknown=0, NotChecked=0, Total=4032 [2021-11-07 07:50:08,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-07 07:50:08,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2021-11-07 07:50:08,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0081967213114753) internal successors, (123), 122 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:08,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2021-11-07 07:50:08,997 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2021-11-07 07:50:08,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:50:08,997 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2021-11-07 07:50:08,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 63 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:08,998 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2021-11-07 07:50:08,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-07 07:50:08,999 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:50:08,999 INFO L513 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:09,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-07 07:50:09,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-07 07:50:09,225 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:50:09,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:09,225 INFO L85 PathProgramCache]: Analyzing trace with hash 130528690, now seen corresponding path program 58 times [2021-11-07 07:50:09,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:09,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217907397] [2021-11-07 07:50:09,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:09,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:09,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:10,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:10,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:10,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217907397] [2021-11-07 07:50:10,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217907397] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:10,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418295668] [2021-11-07 07:50:10,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:50:10,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:10,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:10,599 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:10,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-07 07:50:11,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:50:11,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:11,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-07 07:50:11,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:12,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:12,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418295668] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:12,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:12,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 64 [2021-11-07 07:50:12,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837406759] [2021-11-07 07:50:12,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-07 07:50:12,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:12,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-07 07:50:12,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1896, Invalid=2136, Unknown=0, NotChecked=0, Total=4032 [2021-11-07 07:50:12,142 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand has 64 states, 64 states have (on average 1.984375) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:12,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:50:12,217 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2021-11-07 07:50:12,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-07 07:50:12,218 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.984375) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-11-07 07:50:12,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:50:12,219 INFO L225 Difference]: With dead ends: 130 [2021-11-07 07:50:12,219 INFO L226 Difference]: Without dead ends: 126 [2021-11-07 07:50:12,219 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1901, Invalid=2259, Unknown=0, NotChecked=0, Total=4160 [2021-11-07 07:50:12,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-07 07:50:12,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2021-11-07 07:50:12,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0080645161290323) internal successors, (125), 124 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:12,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2021-11-07 07:50:12,224 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2021-11-07 07:50:12,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:50:12,224 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2021-11-07 07:50:12,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.984375) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:12,224 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2021-11-07 07:50:12,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-07 07:50:12,225 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:50:12,225 INFO L513 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:12,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-11-07 07:50:12,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-07 07:50:12,426 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:50:12,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:12,426 INFO L85 PathProgramCache]: Analyzing trace with hash 937162583, now seen corresponding path program 59 times [2021-11-07 07:50:12,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:12,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015290414] [2021-11-07 07:50:12,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:12,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:13,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:13,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:13,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015290414] [2021-11-07 07:50:13,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015290414] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:13,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308633804] [2021-11-07 07:50:13,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:50:13,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:13,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:13,845 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:13,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-07 07:50:15,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2021-11-07 07:50:15,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:15,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-07 07:50:15,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:15,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308633804] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:15,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:15,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 65 [2021-11-07 07:50:15,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854379048] [2021-11-07 07:50:15,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-07 07:50:15,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:15,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-07 07:50:15,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1958, Invalid=2202, Unknown=0, NotChecked=0, Total=4160 [2021-11-07 07:50:15,537 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:15,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:50:15,631 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2021-11-07 07:50:15,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-07 07:50:15,632 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 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 124 [2021-11-07 07:50:15,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:50:15,633 INFO L225 Difference]: With dead ends: 132 [2021-11-07 07:50:15,633 INFO L226 Difference]: Without dead ends: 128 [2021-11-07 07:50:15,634 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1963, Invalid=2327, Unknown=0, NotChecked=0, Total=4290 [2021-11-07 07:50:15,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-07 07:50:15,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-11-07 07:50:15,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.007936507936508) internal successors, (127), 126 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:15,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2021-11-07 07:50:15,638 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2021-11-07 07:50:15,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:50:15,639 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2021-11-07 07:50:15,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:15,639 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2021-11-07 07:50:15,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-07 07:50:15,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:50:15,640 INFO L513 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:15,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-07 07:50:15,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:15,864 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:50:15,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:15,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1276746820, now seen corresponding path program 60 times [2021-11-07 07:50:15,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:15,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041076988] [2021-11-07 07:50:15,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:15,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:17,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:17,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:17,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041076988] [2021-11-07 07:50:17,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041076988] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:17,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779803690] [2021-11-07 07:50:17,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:50:17,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:17,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:17,288 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:17,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-07 07:50:18,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2021-11-07 07:50:18,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:18,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-07 07:50:18,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:18,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:18,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779803690] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:18,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:18,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 66 [2021-11-07 07:50:18,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909541732] [2021-11-07 07:50:18,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-07 07:50:18,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:18,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-07 07:50:18,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2021, Invalid=2269, Unknown=0, NotChecked=0, Total=4290 [2021-11-07 07:50:18,964 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand has 66 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 66 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:19,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:50:19,040 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2021-11-07 07:50:19,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-07 07:50:19,040 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 66 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-11-07 07:50:19,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:50:19,041 INFO L225 Difference]: With dead ends: 134 [2021-11-07 07:50:19,041 INFO L226 Difference]: Without dead ends: 130 [2021-11-07 07:50:19,042 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2026, Invalid=2396, Unknown=0, NotChecked=0, Total=4422 [2021-11-07 07:50:19,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-07 07:50:19,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2021-11-07 07:50:19,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.0078125) internal successors, (129), 128 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:19,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2021-11-07 07:50:19,046 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2021-11-07 07:50:19,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:50:19,046 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2021-11-07 07:50:19,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 66 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:19,047 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2021-11-07 07:50:19,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-07 07:50:19,047 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:50:19,048 INFO L513 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:19,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-07 07:50:19,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:19,273 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:50:19,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:19,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1460095713, now seen corresponding path program 61 times [2021-11-07 07:50:19,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:19,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402810069] [2021-11-07 07:50:19,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:19,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:20,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:20,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:20,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402810069] [2021-11-07 07:50:20,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402810069] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:20,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763825427] [2021-11-07 07:50:20,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:50:20,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:20,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:20,765 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:20,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-07 07:50:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:22,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-07 07:50:22,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:22,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:22,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763825427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:22,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:22,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 67 [2021-11-07 07:50:22,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644123488] [2021-11-07 07:50:22,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-07 07:50:22,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:22,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-07 07:50:22,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2085, Invalid=2337, Unknown=0, NotChecked=0, Total=4422 [2021-11-07 07:50:22,452 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand has 67 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 67 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:22,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:50:22,547 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2021-11-07 07:50:22,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-07 07:50:22,547 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 67 states have internal predecessors, (133), 0 states have call successors, (0), 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 128 [2021-11-07 07:50:22,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:50:22,548 INFO L225 Difference]: With dead ends: 136 [2021-11-07 07:50:22,548 INFO L226 Difference]: Without dead ends: 132 [2021-11-07 07:50:22,549 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2090, Invalid=2466, Unknown=0, NotChecked=0, Total=4556 [2021-11-07 07:50:22,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-07 07:50:22,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-11-07 07:50:22,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0076923076923077) internal successors, (131), 130 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:22,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2021-11-07 07:50:22,553 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2021-11-07 07:50:22,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:50:22,553 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2021-11-07 07:50:22,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 67 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:22,553 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2021-11-07 07:50:22,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-07 07:50:22,554 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:50:22,554 INFO L513 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:22,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-11-07 07:50:22,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-11-07 07:50:22,769 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:50:22,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:22,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1249182522, now seen corresponding path program 62 times [2021-11-07 07:50:22,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:22,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296662607] [2021-11-07 07:50:22,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:22,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:22,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:24,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:24,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:24,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296662607] [2021-11-07 07:50:24,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296662607] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:24,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493597957] [2021-11-07 07:50:24,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:50:24,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:24,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:24,225 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:24,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-07 07:50:25,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:50:25,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:25,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-07 07:50:25,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:25,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:25,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493597957] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:25,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:25,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 68 [2021-11-07 07:50:25,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899873613] [2021-11-07 07:50:25,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-07 07:50:25,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:25,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-07 07:50:25,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2150, Invalid=2406, Unknown=0, NotChecked=0, Total=4556 [2021-11-07 07:50:25,978 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand has 68 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 68 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:26,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:50:26,109 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2021-11-07 07:50:26,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-07 07:50:26,109 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 68 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-07 07:50:26,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:50:26,111 INFO L225 Difference]: With dead ends: 138 [2021-11-07 07:50:26,111 INFO L226 Difference]: Without dead ends: 134 [2021-11-07 07:50:26,111 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2155, Invalid=2537, Unknown=0, NotChecked=0, Total=4692 [2021-11-07 07:50:26,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-07 07:50:26,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2021-11-07 07:50:26,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0075757575757576) internal successors, (133), 132 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:26,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2021-11-07 07:50:26,117 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2021-11-07 07:50:26,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:50:26,118 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2021-11-07 07:50:26,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 68 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:26,118 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2021-11-07 07:50:26,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-07 07:50:26,119 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:50:26,119 INFO L513 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:26,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-11-07 07:50:26,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:26,333 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:50:26,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:26,333 INFO L85 PathProgramCache]: Analyzing trace with hash -2115384981, now seen corresponding path program 63 times [2021-11-07 07:50:26,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:26,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637551779] [2021-11-07 07:50:26,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:26,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:27,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:27,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:27,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637551779] [2021-11-07 07:50:27,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637551779] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:27,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374935858] [2021-11-07 07:50:27,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:50:27,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:27,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:27,819 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:27,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-07 07:50:29,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2021-11-07 07:50:29,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:29,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-07 07:50:29,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:29,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:29,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374935858] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:29,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:29,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 69 [2021-11-07 07:50:29,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671372538] [2021-11-07 07:50:29,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-07 07:50:29,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:29,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-07 07:50:29,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2216, Invalid=2476, Unknown=0, NotChecked=0, Total=4692 [2021-11-07 07:50:29,655 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 69 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:29,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:50:29,789 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2021-11-07 07:50:29,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-07 07:50:29,789 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 69 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-07 07:50:29,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:50:29,790 INFO L225 Difference]: With dead ends: 140 [2021-11-07 07:50:29,790 INFO L226 Difference]: Without dead ends: 136 [2021-11-07 07:50:29,790 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2221, Invalid=2609, Unknown=0, NotChecked=0, Total=4830 [2021-11-07 07:50:29,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-07 07:50:29,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2021-11-07 07:50:29,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.007462686567164) internal successors, (135), 134 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:29,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2021-11-07 07:50:29,793 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2021-11-07 07:50:29,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:50:29,793 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2021-11-07 07:50:29,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 69 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:29,794 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2021-11-07 07:50:29,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-07 07:50:29,794 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:50:29,794 INFO L513 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:29,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-11-07 07:50:29,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:29,995 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:50:29,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:29,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1312292656, now seen corresponding path program 64 times [2021-11-07 07:50:29,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:29,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239238784] [2021-11-07 07:50:29,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:29,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:30,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:31,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:31,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:31,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239238784] [2021-11-07 07:50:31,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239238784] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:31,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612580775] [2021-11-07 07:50:31,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:50:31,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:31,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:31,549 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:31,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-07 07:50:32,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:50:32,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:33,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-07 07:50:33,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:33,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:33,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612580775] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:33,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:33,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 70 [2021-11-07 07:50:33,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537096617] [2021-11-07 07:50:33,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-07 07:50:33,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:33,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-07 07:50:33,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2283, Invalid=2547, Unknown=0, NotChecked=0, Total=4830 [2021-11-07 07:50:33,377 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 70 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:33,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:50:33,487 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2021-11-07 07:50:33,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-07 07:50:33,487 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 70 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-07 07:50:33,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:50:33,489 INFO L225 Difference]: With dead ends: 142 [2021-11-07 07:50:33,489 INFO L226 Difference]: Without dead ends: 138 [2021-11-07 07:50:33,490 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2288, Invalid=2682, Unknown=0, NotChecked=0, Total=4970 [2021-11-07 07:50:33,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-07 07:50:33,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-11-07 07:50:33,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0073529411764706) internal successors, (137), 136 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:33,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2021-11-07 07:50:33,494 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2021-11-07 07:50:33,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:50:33,494 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2021-11-07 07:50:33,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 70 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:33,494 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2021-11-07 07:50:33,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-07 07:50:33,495 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:50:33,495 INFO L513 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:33,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-11-07 07:50:33,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-11-07 07:50:33,717 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:50:33,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:33,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1660285685, now seen corresponding path program 65 times [2021-11-07 07:50:33,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:33,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257203268] [2021-11-07 07:50:33,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:33,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:33,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:35,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:35,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:35,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257203268] [2021-11-07 07:50:35,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257203268] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:35,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224435408] [2021-11-07 07:50:35,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:50:35,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:35,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:35,370 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:35,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-07 07:50:36,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2021-11-07 07:50:36,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:36,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-07 07:50:36,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:37,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:37,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224435408] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:37,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:37,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 71 [2021-11-07 07:50:37,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990439675] [2021-11-07 07:50:37,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-07 07:50:37,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:37,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-07 07:50:37,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2351, Invalid=2619, Unknown=0, NotChecked=0, Total=4970 [2021-11-07 07:50:37,266 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand has 71 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 71 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:37,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:50:37,357 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2021-11-07 07:50:37,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-07 07:50:37,358 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 71 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-11-07 07:50:37,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:50:37,358 INFO L225 Difference]: With dead ends: 144 [2021-11-07 07:50:37,359 INFO L226 Difference]: Without dead ends: 140 [2021-11-07 07:50:37,359 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2356, Invalid=2756, Unknown=0, NotChecked=0, Total=5112 [2021-11-07 07:50:37,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-07 07:50:37,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2021-11-07 07:50:37,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0072463768115942) internal successors, (139), 138 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:37,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2021-11-07 07:50:37,362 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2021-11-07 07:50:37,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:50:37,362 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2021-11-07 07:50:37,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 71 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:37,362 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2021-11-07 07:50:37,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-07 07:50:37,363 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:50:37,363 INFO L513 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:37,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-11-07 07:50:37,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-11-07 07:50:37,565 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:50:37,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:37,565 INFO L85 PathProgramCache]: Analyzing trace with hash -2140147750, now seen corresponding path program 66 times [2021-11-07 07:50:37,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:37,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259180435] [2021-11-07 07:50:37,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:37,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:37,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:39,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:39,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:39,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259180435] [2021-11-07 07:50:39,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259180435] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:39,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008785355] [2021-11-07 07:50:39,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:50:39,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:39,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:39,245 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:39,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-07 07:50:40,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2021-11-07 07:50:40,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:40,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-07 07:50:40,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:41,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:41,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008785355] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:41,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:41,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 72 [2021-11-07 07:50:41,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839479432] [2021-11-07 07:50:41,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-07 07:50:41,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:41,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-07 07:50:41,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2420, Invalid=2692, Unknown=0, NotChecked=0, Total=5112 [2021-11-07 07:50:41,240 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand has 72 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 72 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:41,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:50:41,363 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2021-11-07 07:50:41,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-07 07:50:41,363 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 72 states have internal predecessors, (143), 0 states have call successors, (0), 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 138 [2021-11-07 07:50:41,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:50:41,365 INFO L225 Difference]: With dead ends: 146 [2021-11-07 07:50:41,365 INFO L226 Difference]: Without dead ends: 142 [2021-11-07 07:50:41,366 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2425, Invalid=2831, Unknown=0, NotChecked=0, Total=5256 [2021-11-07 07:50:41,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-07 07:50:41,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2021-11-07 07:50:41,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0071428571428571) internal successors, (141), 140 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:41,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2021-11-07 07:50:41,370 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2021-11-07 07:50:41,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:50:41,371 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2021-11-07 07:50:41,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 72 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:41,371 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2021-11-07 07:50:41,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-07 07:50:41,372 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:50:41,372 INFO L513 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:41,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-11-07 07:50:41,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-11-07 07:50:41,585 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:50:41,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:41,585 INFO L85 PathProgramCache]: Analyzing trace with hash 660490111, now seen corresponding path program 67 times [2021-11-07 07:50:41,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:41,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62721725] [2021-11-07 07:50:41,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:41,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:41,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:43,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:43,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62721725] [2021-11-07 07:50:43,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62721725] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:43,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710250009] [2021-11-07 07:50:43,332 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:50:43,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:43,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:43,333 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:43,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-07 07:50:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:44,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-07 07:50:44,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:45,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:45,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710250009] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:45,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:45,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 73 [2021-11-07 07:50:45,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110033016] [2021-11-07 07:50:45,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-07 07:50:45,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:45,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-07 07:50:45,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2490, Invalid=2766, Unknown=0, NotChecked=0, Total=5256 [2021-11-07 07:50:45,342 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:45,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:50:45,452 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2021-11-07 07:50:45,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-07 07:50:45,452 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 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 140 [2021-11-07 07:50:45,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:50:45,453 INFO L225 Difference]: With dead ends: 148 [2021-11-07 07:50:45,453 INFO L226 Difference]: Without dead ends: 144 [2021-11-07 07:50:45,453 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2495, Invalid=2907, Unknown=0, NotChecked=0, Total=5402 [2021-11-07 07:50:45,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-07 07:50:45,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2021-11-07 07:50:45,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0070422535211268) internal successors, (143), 142 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:45,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2021-11-07 07:50:45,456 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2021-11-07 07:50:45,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:50:45,457 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2021-11-07 07:50:45,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:45,457 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2021-11-07 07:50:45,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-07 07:50:45,458 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:50:45,458 INFO L513 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:45,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-11-07 07:50:45,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-11-07 07:50:45,658 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:50:45,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:45,659 INFO L85 PathProgramCache]: Analyzing trace with hash -871020060, now seen corresponding path program 68 times [2021-11-07 07:50:45,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:45,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809009328] [2021-11-07 07:50:45,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:45,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:45,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:47,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:47,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:47,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809009328] [2021-11-07 07:50:47,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809009328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:47,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351739677] [2021-11-07 07:50:47,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:50:47,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:47,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:47,374 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:47,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-07 07:50:49,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:50:49,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:49,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-07 07:50:49,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:49,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:49,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351739677] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:49,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:49,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 74 [2021-11-07 07:50:49,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670726448] [2021-11-07 07:50:49,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-11-07 07:50:49,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:49,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-11-07 07:50:49,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2561, Invalid=2841, Unknown=0, NotChecked=0, Total=5402 [2021-11-07 07:50:49,380 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand has 74 states, 74 states have (on average 1.9864864864864864) internal successors, (147), 74 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:49,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:50:49,471 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2021-11-07 07:50:49,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-07 07:50:49,471 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.9864864864864864) internal successors, (147), 74 states have internal predecessors, (147), 0 states have call successors, (0), 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 142 [2021-11-07 07:50:49,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:50:49,472 INFO L225 Difference]: With dead ends: 150 [2021-11-07 07:50:49,472 INFO L226 Difference]: Without dead ends: 146 [2021-11-07 07:50:49,472 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2566, Invalid=2984, Unknown=0, NotChecked=0, Total=5550 [2021-11-07 07:50:49,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-07 07:50:49,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2021-11-07 07:50:49,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0069444444444444) internal successors, (145), 144 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:49,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2021-11-07 07:50:49,476 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2021-11-07 07:50:49,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:50:49,476 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2021-11-07 07:50:49,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.9864864864864864) internal successors, (147), 74 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:49,477 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2021-11-07 07:50:49,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-07 07:50:49,478 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:50:49,478 INFO L513 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:49,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-11-07 07:50:49,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:49,693 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:50:49,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:49,693 INFO L85 PathProgramCache]: Analyzing trace with hash 521488137, now seen corresponding path program 69 times [2021-11-07 07:50:49,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:49,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487651654] [2021-11-07 07:50:49,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:49,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:51,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:51,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487651654] [2021-11-07 07:50:51,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487651654] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:51,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637622426] [2021-11-07 07:50:51,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:50:51,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:51,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:51,433 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:51,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-11-07 07:50:53,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2021-11-07 07:50:53,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:53,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-07 07:50:53,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:53,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:53,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637622426] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:53,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:53,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 75 [2021-11-07 07:50:53,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394472288] [2021-11-07 07:50:53,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-07 07:50:53,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:53,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-07 07:50:53,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2633, Invalid=2917, Unknown=0, NotChecked=0, Total=5550 [2021-11-07 07:50:53,592 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 75 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:53,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:50:53,694 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2021-11-07 07:50:53,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-07 07:50:53,694 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 75 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-11-07 07:50:53,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:50:53,696 INFO L225 Difference]: With dead ends: 152 [2021-11-07 07:50:53,696 INFO L226 Difference]: Without dead ends: 148 [2021-11-07 07:50:53,697 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2638, Invalid=3062, Unknown=0, NotChecked=0, Total=5700 [2021-11-07 07:50:53,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-07 07:50:53,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2021-11-07 07:50:53,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.0068493150684932) internal successors, (147), 146 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:53,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2021-11-07 07:50:53,701 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2021-11-07 07:50:53,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:50:53,702 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2021-11-07 07:50:53,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 75 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:53,702 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2021-11-07 07:50:53,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-07 07:50:53,703 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:50:53,703 INFO L513 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:53,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-11-07 07:50:53,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:53,917 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:50:53,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:53,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1307930898, now seen corresponding path program 70 times [2021-11-07 07:50:53,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:53,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959900334] [2021-11-07 07:50:53,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:53,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:50:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:55,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:50:55,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959900334] [2021-11-07 07:50:55,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959900334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:55,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555721592] [2021-11-07 07:50:55,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:50:55,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:50:55,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:50:55,769 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:50:55,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-07 07:50:57,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:50:57,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:50:57,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-07 07:50:57,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:50:57,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:50:57,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555721592] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:50:57,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:50:57,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 76 [2021-11-07 07:50:57,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464131831] [2021-11-07 07:50:57,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-07 07:50:57,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:50:57,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-07 07:50:57,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2706, Invalid=2994, Unknown=0, NotChecked=0, Total=5700 [2021-11-07 07:50:57,894 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand has 76 states, 76 states have (on average 1.986842105263158) internal successors, (151), 76 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:57,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:50:57,986 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2021-11-07 07:50:57,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-07 07:50:57,987 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.986842105263158) internal successors, (151), 76 states have internal predecessors, (151), 0 states have call successors, (0), 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 146 [2021-11-07 07:50:57,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:50:57,988 INFO L225 Difference]: With dead ends: 154 [2021-11-07 07:50:57,988 INFO L226 Difference]: Without dead ends: 150 [2021-11-07 07:50:57,989 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2711, Invalid=3141, Unknown=0, NotChecked=0, Total=5852 [2021-11-07 07:50:57,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-07 07:50:57,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2021-11-07 07:50:57,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0067567567567568) internal successors, (149), 148 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:57,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2021-11-07 07:50:57,993 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2021-11-07 07:50:57,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:50:57,993 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2021-11-07 07:50:57,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.986842105263158) internal successors, (151), 76 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:50:57,994 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2021-11-07 07:50:57,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-07 07:50:57,995 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:50:57,995 INFO L513 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1] [2021-11-07 07:50:58,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-11-07 07:50:58,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-11-07 07:50:58,221 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:50:58,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:50:58,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1556967827, now seen corresponding path program 71 times [2021-11-07 07:50:58,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:50:58,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304135046] [2021-11-07 07:50:58,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:50:58,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:50:58,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:00,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:00,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:00,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304135046] [2021-11-07 07:51:00,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304135046] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:00,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072762881] [2021-11-07 07:51:00,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:51:00,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:00,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:00,088 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:00,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-07 07:51:01,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2021-11-07 07:51:01,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:51:01,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-07 07:51:01,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:02,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072762881] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:02,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:02,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 77 [2021-11-07 07:51:02,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521463195] [2021-11-07 07:51:02,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-07 07:51:02,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:02,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-07 07:51:02,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2780, Invalid=3072, Unknown=0, NotChecked=0, Total=5852 [2021-11-07 07:51:02,386 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand has 77 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 77 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:02,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:02,481 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2021-11-07 07:51:02,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-07 07:51:02,481 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 77 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-11-07 07:51:02,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:02,482 INFO L225 Difference]: With dead ends: 156 [2021-11-07 07:51:02,482 INFO L226 Difference]: Without dead ends: 152 [2021-11-07 07:51:02,483 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2785, Invalid=3221, Unknown=0, NotChecked=0, Total=6006 [2021-11-07 07:51:02,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-07 07:51:02,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2021-11-07 07:51:02,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0066666666666666) internal successors, (151), 150 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:02,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2021-11-07 07:51:02,487 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2021-11-07 07:51:02,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:02,487 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2021-11-07 07:51:02,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 77 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:02,487 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2021-11-07 07:51:02,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-07 07:51:02,488 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:02,489 INFO L513 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1] [2021-11-07 07:51:02,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-11-07 07:51:02,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:02,709 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:02,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:02,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1650605816, now seen corresponding path program 72 times [2021-11-07 07:51:02,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:02,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569265608] [2021-11-07 07:51:02,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:02,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:02,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:04,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:04,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569265608] [2021-11-07 07:51:04,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569265608] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:04,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569279825] [2021-11-07 07:51:04,651 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:51:04,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:04,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:04,651 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:04,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-11-07 07:51:06,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2021-11-07 07:51:06,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:51:06,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-07 07:51:06,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:06,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:06,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569279825] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:06,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:06,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 78 [2021-11-07 07:51:06,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399285431] [2021-11-07 07:51:06,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-07 07:51:06,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:06,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-07 07:51:06,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2855, Invalid=3151, Unknown=0, NotChecked=0, Total=6006 [2021-11-07 07:51:06,985 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand has 78 states, 78 states have (on average 1.9871794871794872) internal successors, (155), 78 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:07,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:07,080 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2021-11-07 07:51:07,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-11-07 07:51:07,080 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.9871794871794872) internal successors, (155), 78 states have internal predecessors, (155), 0 states have call successors, (0), 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 150 [2021-11-07 07:51:07,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:07,081 INFO L225 Difference]: With dead ends: 158 [2021-11-07 07:51:07,081 INFO L226 Difference]: Without dead ends: 154 [2021-11-07 07:51:07,081 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2860, Invalid=3302, Unknown=0, NotChecked=0, Total=6162 [2021-11-07 07:51:07,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-07 07:51:07,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2021-11-07 07:51:07,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.006578947368421) internal successors, (153), 152 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:07,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2021-11-07 07:51:07,084 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2021-11-07 07:51:07,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:07,084 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2021-11-07 07:51:07,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.9871794871794872) internal successors, (155), 78 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:07,085 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2021-11-07 07:51:07,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-07 07:51:07,086 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:07,086 INFO L513 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1] [2021-11-07 07:51:07,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-11-07 07:51:07,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:07,289 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:07,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:07,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1442400029, now seen corresponding path program 73 times [2021-11-07 07:51:07,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:07,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647035861] [2021-11-07 07:51:07,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:07,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:07,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:09,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:09,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:09,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647035861] [2021-11-07 07:51:09,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647035861] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:09,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351110432] [2021-11-07 07:51:09,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:51:09,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:09,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:09,279 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:09,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-11-07 07:51:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:11,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-07 07:51:11,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:11,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:11,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351110432] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:11,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:11,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 79 [2021-11-07 07:51:11,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079255514] [2021-11-07 07:51:11,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-07 07:51:11,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:11,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-07 07:51:11,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2931, Invalid=3231, Unknown=0, NotChecked=0, Total=6162 [2021-11-07 07:51:11,485 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand has 79 states, 79 states have (on average 1.9873417721518987) internal successors, (157), 79 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:11,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:11,583 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2021-11-07 07:51:11,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-11-07 07:51:11,584 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.9873417721518987) internal successors, (157), 79 states have internal predecessors, (157), 0 states have call successors, (0), 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 152 [2021-11-07 07:51:11,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:11,585 INFO L225 Difference]: With dead ends: 160 [2021-11-07 07:51:11,585 INFO L226 Difference]: Without dead ends: 156 [2021-11-07 07:51:11,585 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2936, Invalid=3384, Unknown=0, NotChecked=0, Total=6320 [2021-11-07 07:51:11,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-07 07:51:11,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2021-11-07 07:51:11,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0064935064935066) internal successors, (155), 154 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:11,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2021-11-07 07:51:11,589 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2021-11-07 07:51:11,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:11,589 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2021-11-07 07:51:11,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.9873417721518987) internal successors, (157), 79 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:11,590 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2021-11-07 07:51:11,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-07 07:51:11,591 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:11,591 INFO L513 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1] [2021-11-07 07:51:11,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-11-07 07:51:11,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-11-07 07:51:11,805 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:11,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:11,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1074865662, now seen corresponding path program 74 times [2021-11-07 07:51:11,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:11,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489697692] [2021-11-07 07:51:11,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:11,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:13,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:13,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:13,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489697692] [2021-11-07 07:51:13,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489697692] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:13,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190748229] [2021-11-07 07:51:13,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:51:13,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:13,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:13,835 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:13,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-07 07:51:15,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:51:15,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:51:15,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-07 07:51:15,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:16,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:16,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190748229] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:16,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:16,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 80 [2021-11-07 07:51:16,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846594072] [2021-11-07 07:51:16,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-07 07:51:16,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:16,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-07 07:51:16,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3008, Invalid=3312, Unknown=0, NotChecked=0, Total=6320 [2021-11-07 07:51:16,159 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand has 80 states, 80 states have (on average 1.9875) internal successors, (159), 80 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:16,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:16,296 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2021-11-07 07:51:16,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-07 07:51:16,297 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.9875) internal successors, (159), 80 states have internal predecessors, (159), 0 states have call successors, (0), 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 154 [2021-11-07 07:51:16,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:16,298 INFO L225 Difference]: With dead ends: 162 [2021-11-07 07:51:16,298 INFO L226 Difference]: Without dead ends: 158 [2021-11-07 07:51:16,299 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3013, Invalid=3467, Unknown=0, NotChecked=0, Total=6480 [2021-11-07 07:51:16,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-07 07:51:16,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2021-11-07 07:51:16,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0064102564102564) internal successors, (157), 156 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:16,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2021-11-07 07:51:16,304 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2021-11-07 07:51:16,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:16,304 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2021-11-07 07:51:16,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.9875) internal successors, (159), 80 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:16,305 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2021-11-07 07:51:16,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-07 07:51:16,305 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:16,306 INFO L513 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1] [2021-11-07 07:51:16,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-11-07 07:51:16,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-11-07 07:51:16,529 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:16,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:16,529 INFO L85 PathProgramCache]: Analyzing trace with hash -2100607065, now seen corresponding path program 75 times [2021-11-07 07:51:16,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:16,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251537735] [2021-11-07 07:51:16,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:16,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:16,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:18,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:18,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251537735] [2021-11-07 07:51:18,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251537735] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:18,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25859185] [2021-11-07 07:51:18,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:51:18,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:18,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:18,592 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:18,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-11-07 07:51:20,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2021-11-07 07:51:20,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:51:20,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 862 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-07 07:51:20,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:21,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:21,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25859185] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:21,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:21,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 81 [2021-11-07 07:51:21,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509898291] [2021-11-07 07:51:21,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-11-07 07:51:21,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:21,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-11-07 07:51:21,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3086, Invalid=3394, Unknown=0, NotChecked=0, Total=6480 [2021-11-07 07:51:21,103 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand has 81 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 81 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:21,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:21,239 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2021-11-07 07:51:21,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-07 07:51:21,239 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 81 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-11-07 07:51:21,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:21,240 INFO L225 Difference]: With dead ends: 164 [2021-11-07 07:51:21,240 INFO L226 Difference]: Without dead ends: 160 [2021-11-07 07:51:21,240 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3091, Invalid=3551, Unknown=0, NotChecked=0, Total=6642 [2021-11-07 07:51:21,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-07 07:51:21,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2021-11-07 07:51:21,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0063291139240507) internal successors, (159), 158 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:21,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2021-11-07 07:51:21,244 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2021-11-07 07:51:21,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:21,245 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2021-11-07 07:51:21,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 81 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:21,245 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2021-11-07 07:51:21,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-07 07:51:21,246 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:21,246 INFO L513 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1] [2021-11-07 07:51:21,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-11-07 07:51:21,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:21,469 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:21,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:21,469 INFO L85 PathProgramCache]: Analyzing trace with hash 4382732, now seen corresponding path program 76 times [2021-11-07 07:51:21,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:21,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021436093] [2021-11-07 07:51:21,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:21,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:21,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:23,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:23,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:23,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021436093] [2021-11-07 07:51:23,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021436093] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:23,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285136272] [2021-11-07 07:51:23,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:51:23,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:23,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:23,567 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:23,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-11-07 07:51:25,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:51:25,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:51:25,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-07 07:51:25,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:26,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:26,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285136272] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:26,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:26,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 82 [2021-11-07 07:51:26,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649897902] [2021-11-07 07:51:26,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-07 07:51:26,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:26,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-07 07:51:26,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3165, Invalid=3477, Unknown=0, NotChecked=0, Total=6642 [2021-11-07 07:51:26,048 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand has 82 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 82 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:26,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:26,150 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2021-11-07 07:51:26,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-11-07 07:51:26,151 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 82 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2021-11-07 07:51:26,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:26,153 INFO L225 Difference]: With dead ends: 166 [2021-11-07 07:51:26,153 INFO L226 Difference]: Without dead ends: 162 [2021-11-07 07:51:26,153 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3170, Invalid=3636, Unknown=0, NotChecked=0, Total=6806 [2021-11-07 07:51:26,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-07 07:51:26,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2021-11-07 07:51:26,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.00625) internal successors, (161), 160 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:26,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2021-11-07 07:51:26,158 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2021-11-07 07:51:26,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:26,158 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2021-11-07 07:51:26,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 82 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:26,159 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2021-11-07 07:51:26,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-07 07:51:26,160 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:26,160 INFO L513 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1] [2021-11-07 07:51:26,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-11-07 07:51:26,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:26,385 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:26,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:26,385 INFO L85 PathProgramCache]: Analyzing trace with hash -30018767, now seen corresponding path program 77 times [2021-11-07 07:51:26,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:26,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837602587] [2021-11-07 07:51:26,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:26,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:28,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:28,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:28,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837602587] [2021-11-07 07:51:28,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837602587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:28,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265737041] [2021-11-07 07:51:28,670 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:51:28,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:28,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:28,671 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:28,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-11-07 07:51:30,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2021-11-07 07:51:30,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:51:30,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-07 07:51:30,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:31,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265737041] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:31,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:31,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 83 [2021-11-07 07:51:31,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144266592] [2021-11-07 07:51:31,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-07 07:51:31,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:31,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-07 07:51:31,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3245, Invalid=3561, Unknown=0, NotChecked=0, Total=6806 [2021-11-07 07:51:31,288 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand has 83 states, 83 states have (on average 1.9879518072289157) internal successors, (165), 83 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:31,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:31,404 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2021-11-07 07:51:31,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-07 07:51:31,405 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.9879518072289157) internal successors, (165), 83 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-11-07 07:51:31,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:31,406 INFO L225 Difference]: With dead ends: 168 [2021-11-07 07:51:31,406 INFO L226 Difference]: Without dead ends: 164 [2021-11-07 07:51:31,406 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3250, Invalid=3722, Unknown=0, NotChecked=0, Total=6972 [2021-11-07 07:51:31,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-07 07:51:31,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2021-11-07 07:51:31,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0061728395061729) internal successors, (163), 162 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:31,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2021-11-07 07:51:31,411 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2021-11-07 07:51:31,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:31,411 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2021-11-07 07:51:31,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.9879518072289157) internal successors, (165), 83 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:31,412 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2021-11-07 07:51:31,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-07 07:51:31,413 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:31,413 INFO L513 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1] [2021-11-07 07:51:31,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-11-07 07:51:31,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-11-07 07:51:31,629 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:31,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:31,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1269879062, now seen corresponding path program 78 times [2021-11-07 07:51:31,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:31,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471941255] [2021-11-07 07:51:31,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:31,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:31,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:33,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:33,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:33,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471941255] [2021-11-07 07:51:33,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471941255] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:33,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331393665] [2021-11-07 07:51:33,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:51:33,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:33,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:33,999 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:34,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-11-07 07:51:36,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2021-11-07 07:51:36,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:51:36,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-07 07:51:36,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:36,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331393665] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:36,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:36,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 84 [2021-11-07 07:51:36,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886349576] [2021-11-07 07:51:36,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-07 07:51:36,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:36,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-07 07:51:36,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3326, Invalid=3646, Unknown=0, NotChecked=0, Total=6972 [2021-11-07 07:51:36,888 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand has 84 states, 84 states have (on average 1.9880952380952381) internal successors, (167), 84 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:37,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:37,037 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2021-11-07 07:51:37,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-07 07:51:37,038 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.9880952380952381) internal successors, (167), 84 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2021-11-07 07:51:37,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:37,039 INFO L225 Difference]: With dead ends: 170 [2021-11-07 07:51:37,039 INFO L226 Difference]: Without dead ends: 166 [2021-11-07 07:51:37,039 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3331, Invalid=3809, Unknown=0, NotChecked=0, Total=7140 [2021-11-07 07:51:37,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-07 07:51:37,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2021-11-07 07:51:37,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0060975609756098) internal successors, (165), 164 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:37,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2021-11-07 07:51:37,043 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2021-11-07 07:51:37,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:37,043 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2021-11-07 07:51:37,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.9880952380952381) internal successors, (167), 84 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:37,043 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2021-11-07 07:51:37,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-07 07:51:37,044 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:37,044 INFO L513 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1] [2021-11-07 07:51:37,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-11-07 07:51:37,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:37,245 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:37,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:37,245 INFO L85 PathProgramCache]: Analyzing trace with hash 636209595, now seen corresponding path program 79 times [2021-11-07 07:51:37,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:37,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152698992] [2021-11-07 07:51:37,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:37,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:37,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:39,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:39,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:39,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152698992] [2021-11-07 07:51:39,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152698992] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:39,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975851254] [2021-11-07 07:51:39,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:51:39,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:39,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:39,859 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:39,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-11-07 07:51:42,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:42,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-07 07:51:42,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:42,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:42,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975851254] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:42,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:42,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 85 [2021-11-07 07:51:42,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535001610] [2021-11-07 07:51:42,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-11-07 07:51:42,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:42,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-11-07 07:51:42,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3408, Invalid=3732, Unknown=0, NotChecked=0, Total=7140 [2021-11-07 07:51:42,755 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 85 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:42,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:42,918 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2021-11-07 07:51:42,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-11-07 07:51:42,919 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 85 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-11-07 07:51:42,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:42,920 INFO L225 Difference]: With dead ends: 172 [2021-11-07 07:51:42,920 INFO L226 Difference]: Without dead ends: 168 [2021-11-07 07:51:42,920 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3413, Invalid=3897, Unknown=0, NotChecked=0, Total=7310 [2021-11-07 07:51:42,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-07 07:51:42,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2021-11-07 07:51:42,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.0060240963855422) internal successors, (167), 166 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:42,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2021-11-07 07:51:42,923 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2021-11-07 07:51:42,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:42,923 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2021-11-07 07:51:42,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 85 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:42,924 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2021-11-07 07:51:42,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-07 07:51:42,925 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:42,925 INFO L513 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1] [2021-11-07 07:51:42,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-11-07 07:51:43,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:43,126 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:43,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:43,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1565207840, now seen corresponding path program 80 times [2021-11-07 07:51:43,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:43,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457566985] [2021-11-07 07:51:43,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:43,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:43,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:45,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:45,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:45,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457566985] [2021-11-07 07:51:45,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457566985] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:45,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439579761] [2021-11-07 07:51:45,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:51:45,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:45,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:45,726 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:45,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-11-07 07:51:48,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:51:48,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:51:48,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-07 07:51:48,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:48,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:48,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439579761] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:48,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:48,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 86 [2021-11-07 07:51:48,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640685255] [2021-11-07 07:51:48,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-11-07 07:51:48,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:48,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-11-07 07:51:48,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3491, Invalid=3819, Unknown=0, NotChecked=0, Total=7310 [2021-11-07 07:51:48,703 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand has 86 states, 86 states have (on average 1.9883720930232558) internal successors, (171), 86 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:48,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:48,857 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2021-11-07 07:51:48,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-07 07:51:48,858 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.9883720930232558) internal successors, (171), 86 states have internal predecessors, (171), 0 states have call successors, (0), 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 166 [2021-11-07 07:51:48,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:48,859 INFO L225 Difference]: With dead ends: 174 [2021-11-07 07:51:48,859 INFO L226 Difference]: Without dead ends: 170 [2021-11-07 07:51:48,859 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3496, Invalid=3986, Unknown=0, NotChecked=0, Total=7482 [2021-11-07 07:51:48,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-07 07:51:48,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2021-11-07 07:51:48,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.005952380952381) internal successors, (169), 168 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:48,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2021-11-07 07:51:48,863 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2021-11-07 07:51:48,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:48,863 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2021-11-07 07:51:48,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.9883720930232558) internal successors, (171), 86 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:48,864 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2021-11-07 07:51:48,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-07 07:51:48,865 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:48,865 INFO L513 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1] [2021-11-07 07:51:48,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-11-07 07:51:49,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:49,073 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:49,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:49,074 INFO L85 PathProgramCache]: Analyzing trace with hash 979323717, now seen corresponding path program 81 times [2021-11-07 07:51:49,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:49,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439950131] [2021-11-07 07:51:49,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:49,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:49,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:51,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:51,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:51,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439950131] [2021-11-07 07:51:51,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439950131] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:51,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946320474] [2021-11-07 07:51:51,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:51:51,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:51,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:51,821 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:51,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-11-07 07:51:54,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2021-11-07 07:51:54,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:51:54,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 928 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-07 07:51:54,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:51:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:55,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946320474] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:55,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:51:55,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 87 [2021-11-07 07:51:55,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550325687] [2021-11-07 07:51:55,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-07 07:51:55,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:55,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-07 07:51:55,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3575, Invalid=3907, Unknown=0, NotChecked=0, Total=7482 [2021-11-07 07:51:55,105 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand has 87 states, 87 states have (on average 1.9885057471264367) internal successors, (173), 87 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:55,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:55,246 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2021-11-07 07:51:55,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-11-07 07:51:55,247 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.9885057471264367) internal successors, (173), 87 states have internal predecessors, (173), 0 states have call successors, (0), 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 168 [2021-11-07 07:51:55,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:55,248 INFO L225 Difference]: With dead ends: 176 [2021-11-07 07:51:55,248 INFO L226 Difference]: Without dead ends: 172 [2021-11-07 07:51:55,249 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3580, Invalid=4076, Unknown=0, NotChecked=0, Total=7656 [2021-11-07 07:51:55,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-07 07:51:55,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2021-11-07 07:51:55,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.0058823529411764) internal successors, (171), 170 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:55,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2021-11-07 07:51:55,253 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2021-11-07 07:51:55,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:55,253 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2021-11-07 07:51:55,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.9885057471264367) internal successors, (173), 87 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:55,254 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2021-11-07 07:51:55,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-07 07:51:55,255 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:55,255 INFO L513 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1, 1] [2021-11-07 07:51:55,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-11-07 07:51:55,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:55,469 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:55,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:55,469 INFO L85 PathProgramCache]: Analyzing trace with hash 585397290, now seen corresponding path program 82 times [2021-11-07 07:51:55,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:55,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838469322] [2021-11-07 07:51:55,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:55,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:55,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:57,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:57,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:57,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838469322] [2021-11-07 07:51:57,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838469322] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:51:57,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873496889] [2021-11-07 07:51:57,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:51:57,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:51:57,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:57,966 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:51:57,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-11-07 07:52:00,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:52:00,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:52:00,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-07 07:52:00,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:52:00,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:00,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873496889] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:00,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:52:00,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 88 [2021-11-07 07:52:00,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345228062] [2021-11-07 07:52:00,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-11-07 07:52:00,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:00,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-11-07 07:52:00,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3660, Invalid=3996, Unknown=0, NotChecked=0, Total=7656 [2021-11-07 07:52:00,723 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand has 88 states, 88 states have (on average 1.9886363636363635) internal successors, (175), 88 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:00,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:00,835 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2021-11-07 07:52:00,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-07 07:52:00,835 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.9886363636363635) internal successors, (175), 88 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-11-07 07:52:00,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:00,836 INFO L225 Difference]: With dead ends: 178 [2021-11-07 07:52:00,837 INFO L226 Difference]: Without dead ends: 174 [2021-11-07 07:52:00,837 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3665, Invalid=4167, Unknown=0, NotChecked=0, Total=7832 [2021-11-07 07:52:00,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-07 07:52:00,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2021-11-07 07:52:00,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.005813953488372) internal successors, (173), 172 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:00,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2021-11-07 07:52:00,842 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2021-11-07 07:52:00,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:00,842 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2021-11-07 07:52:00,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.9886363636363635) internal successors, (175), 88 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:00,843 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2021-11-07 07:52:00,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-07 07:52:00,844 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:00,844 INFO L513 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:00,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-11-07 07:52:01,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:01,058 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:01,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:01,059 INFO L85 PathProgramCache]: Analyzing trace with hash -20777009, now seen corresponding path program 83 times [2021-11-07 07:52:01,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:01,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342603615] [2021-11-07 07:52:01,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:01,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:01,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:03,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:03,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:03,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342603615] [2021-11-07 07:52:03,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342603615] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:03,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387427284] [2021-11-07 07:52:03,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:52:03,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:03,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:52:03,591 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:52:03,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-11-07 07:52:06,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2021-11-07 07:52:06,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:52:06,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 950 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-07 07:52:06,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:52:06,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:06,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387427284] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:06,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:52:06,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 89 [2021-11-07 07:52:06,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956505998] [2021-11-07 07:52:06,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-11-07 07:52:06,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:06,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-11-07 07:52:06,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3746, Invalid=4086, Unknown=0, NotChecked=0, Total=7832 [2021-11-07 07:52:06,550 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand has 89 states, 89 states have (on average 1.9887640449438202) internal successors, (177), 89 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 07:52:06,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:06,663 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2021-11-07 07:52:06,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-11-07 07:52:06,664 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.9887640449438202) internal successors, (177), 89 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 172 [2021-11-07 07:52:06,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:06,665 INFO L225 Difference]: With dead ends: 180 [2021-11-07 07:52:06,665 INFO L226 Difference]: Without dead ends: 176 [2021-11-07 07:52:06,665 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3751, Invalid=4259, Unknown=0, NotChecked=0, Total=8010 [2021-11-07 07:52:06,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-07 07:52:06,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2021-11-07 07:52:06,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.0057471264367817) internal successors, (175), 174 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:06,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2021-11-07 07:52:06,669 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2021-11-07 07:52:06,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:06,670 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2021-11-07 07:52:06,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.9887640449438202) internal successors, (177), 89 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 07:52:06,670 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2021-11-07 07:52:06,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-07 07:52:06,671 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:06,672 INFO L513 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:06,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-11-07 07:52:06,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-11-07 07:52:06,897 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:06,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:06,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1561273908, now seen corresponding path program 84 times [2021-11-07 07:52:06,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:06,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329309457] [2021-11-07 07:52:06,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:06,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:06,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:09,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:09,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:09,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329309457] [2021-11-07 07:52:09,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329309457] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:09,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913657456] [2021-11-07 07:52:09,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:52:09,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:09,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:52:09,460 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:52:09,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-11-07 07:52:11,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2021-11-07 07:52:11,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:52:11,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-07 07:52:11,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:52:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:12,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913657456] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:12,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:52:12,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 90 [2021-11-07 07:52:12,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783125400] [2021-11-07 07:52:12,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-11-07 07:52:12,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:12,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-11-07 07:52:12,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3833, Invalid=4177, Unknown=0, NotChecked=0, Total=8010 [2021-11-07 07:52:12,477 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 90 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:12,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:12,611 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2021-11-07 07:52:12,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-07 07:52:12,612 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 90 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-11-07 07:52:12,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:12,613 INFO L225 Difference]: With dead ends: 182 [2021-11-07 07:52:12,613 INFO L226 Difference]: Without dead ends: 178 [2021-11-07 07:52:12,614 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3838, Invalid=4352, Unknown=0, NotChecked=0, Total=8190 [2021-11-07 07:52:12,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-07 07:52:12,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2021-11-07 07:52:12,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.0056818181818181) internal successors, (177), 176 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 07:52:12,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2021-11-07 07:52:12,617 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2021-11-07 07:52:12,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:12,618 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2021-11-07 07:52:12,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 90 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:12,618 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2021-11-07 07:52:12,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-07 07:52:12,619 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:12,619 INFO L513 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:12,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-11-07 07:52:12,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:12,820 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:12,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:12,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1493782361, now seen corresponding path program 85 times [2021-11-07 07:52:12,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:12,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249136945] [2021-11-07 07:52:12,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:12,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:12,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:15,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:15,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249136945] [2021-11-07 07:52:15,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249136945] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:15,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154069006] [2021-11-07 07:52:15,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:52:15,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:15,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:52:15,522 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:52:15,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-11-07 07:52:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:18,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-07 07:52:18,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:52:18,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:18,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154069006] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:18,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:52:18,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 91 [2021-11-07 07:52:18,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099784251] [2021-11-07 07:52:18,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-11-07 07:52:18,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:18,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-11-07 07:52:18,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3921, Invalid=4269, Unknown=0, NotChecked=0, Total=8190 [2021-11-07 07:52:18,465 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand has 91 states, 91 states have (on average 1.989010989010989) internal successors, (181), 91 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:18,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:18,582 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2021-11-07 07:52:18,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-11-07 07:52:18,583 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.989010989010989) internal successors, (181), 91 states have internal predecessors, (181), 0 states have call successors, (0), 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 176 [2021-11-07 07:52:18,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:18,584 INFO L225 Difference]: With dead ends: 184 [2021-11-07 07:52:18,584 INFO L226 Difference]: Without dead ends: 180 [2021-11-07 07:52:18,584 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3926, Invalid=4446, Unknown=0, NotChecked=0, Total=8372 [2021-11-07 07:52:18,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-07 07:52:18,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2021-11-07 07:52:18,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.0056179775280898) internal successors, (179), 178 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:18,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2021-11-07 07:52:18,587 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2021-11-07 07:52:18,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:18,587 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2021-11-07 07:52:18,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.989010989010989) internal successors, (181), 91 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:18,587 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2021-11-07 07:52:18,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-07 07:52:18,588 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:18,588 INFO L513 BasicCegarLoop]: trace histogram [86, 86, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:18,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-11-07 07:52:18,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:18,789 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:18,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:18,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1058915134, now seen corresponding path program 86 times [2021-11-07 07:52:18,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:18,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730513931] [2021-11-07 07:52:18,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:18,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:18,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:21,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:21,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730513931] [2021-11-07 07:52:21,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730513931] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:21,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052376486] [2021-11-07 07:52:21,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:52:21,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:21,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:52:21,478 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:52:21,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-11-07 07:52:23,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:52:23,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:52:23,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-07 07:52:23,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:52:24,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:24,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052376486] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:24,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:52:24,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 92 [2021-11-07 07:52:24,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030241603] [2021-11-07 07:52:24,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-11-07 07:52:24,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:24,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-11-07 07:52:24,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4010, Invalid=4362, Unknown=0, NotChecked=0, Total=8372 [2021-11-07 07:52:24,437 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand has 92 states, 92 states have (on average 1.9891304347826086) internal successors, (183), 92 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:24,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:24,556 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2021-11-07 07:52:24,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-07 07:52:24,556 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.9891304347826086) internal successors, (183), 92 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2021-11-07 07:52:24,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:24,557 INFO L225 Difference]: With dead ends: 186 [2021-11-07 07:52:24,557 INFO L226 Difference]: Without dead ends: 182 [2021-11-07 07:52:24,557 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4015, Invalid=4541, Unknown=0, NotChecked=0, Total=8556 [2021-11-07 07:52:24,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-07 07:52:24,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2021-11-07 07:52:24,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.0055555555555555) internal successors, (181), 180 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:24,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2021-11-07 07:52:24,560 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2021-11-07 07:52:24,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:24,561 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2021-11-07 07:52:24,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.9891304347826086) internal successors, (183), 92 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:24,561 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2021-11-07 07:52:24,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-07 07:52:24,562 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:24,562 INFO L513 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:24,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-11-07 07:52:24,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-11-07 07:52:24,773 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:24,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:24,773 INFO L85 PathProgramCache]: Analyzing trace with hash -236662301, now seen corresponding path program 87 times [2021-11-07 07:52:24,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:24,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64475265] [2021-11-07 07:52:24,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:24,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:24,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:27,504 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:27,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:27,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64475265] [2021-11-07 07:52:27,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64475265] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:27,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449618833] [2021-11-07 07:52:27,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:52:27,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:27,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:52:27,506 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:52:27,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-11-07 07:52:30,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2021-11-07 07:52:30,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:52:30,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-07 07:52:30,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:52:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:30,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449618833] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:30,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:52:30,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 93 [2021-11-07 07:52:30,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306543828] [2021-11-07 07:52:30,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-11-07 07:52:30,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:30,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-11-07 07:52:30,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4100, Invalid=4456, Unknown=0, NotChecked=0, Total=8556 [2021-11-07 07:52:30,669 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand has 93 states, 93 states have (on average 1.989247311827957) internal successors, (185), 93 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 07:52:30,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:30,791 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2021-11-07 07:52:30,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-11-07 07:52:30,792 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.989247311827957) internal successors, (185), 93 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 180 [2021-11-07 07:52:30,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:30,793 INFO L225 Difference]: With dead ends: 188 [2021-11-07 07:52:30,793 INFO L226 Difference]: Without dead ends: 184 [2021-11-07 07:52:30,793 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4105, Invalid=4637, Unknown=0, NotChecked=0, Total=8742 [2021-11-07 07:52:30,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-07 07:52:30,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2021-11-07 07:52:30,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.0054945054945055) internal successors, (183), 182 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:30,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2021-11-07 07:52:30,796 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2021-11-07 07:52:30,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:30,796 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2021-11-07 07:52:30,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.989247311827957) internal successors, (185), 93 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 07:52:30,796 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2021-11-07 07:52:30,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-07 07:52:30,797 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:30,797 INFO L513 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:30,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-11-07 07:52:31,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-11-07 07:52:31,016 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:31,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:31,016 INFO L85 PathProgramCache]: Analyzing trace with hash 253938504, now seen corresponding path program 88 times [2021-11-07 07:52:31,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:31,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427925272] [2021-11-07 07:52:31,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:31,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:33,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:33,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:33,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427925272] [2021-11-07 07:52:33,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427925272] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:33,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113077695] [2021-11-07 07:52:33,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:52:33,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:33,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:52:33,895 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:52:33,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-11-07 07:52:36,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:52:36,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:52:36,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-07 07:52:36,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:52:37,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:37,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113077695] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:37,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:52:37,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 94 [2021-11-07 07:52:37,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415009636] [2021-11-07 07:52:37,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-07 07:52:37,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:37,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-07 07:52:37,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4191, Invalid=4551, Unknown=0, NotChecked=0, Total=8742 [2021-11-07 07:52:37,033 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand has 94 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 94 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 07:52:37,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:37,216 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2021-11-07 07:52:37,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-11-07 07:52:37,216 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 94 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 182 [2021-11-07 07:52:37,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:37,218 INFO L225 Difference]: With dead ends: 190 [2021-11-07 07:52:37,218 INFO L226 Difference]: Without dead ends: 186 [2021-11-07 07:52:37,219 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4196, Invalid=4734, Unknown=0, NotChecked=0, Total=8930 [2021-11-07 07:52:37,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-07 07:52:37,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2021-11-07 07:52:37,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.0054347826086956) internal successors, (185), 184 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 07:52:37,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2021-11-07 07:52:37,223 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2021-11-07 07:52:37,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:37,223 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2021-11-07 07:52:37,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 94 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 07:52:37,224 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2021-11-07 07:52:37,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-07 07:52:37,225 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:37,225 INFO L513 BasicCegarLoop]: trace histogram [89, 89, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:37,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-11-07 07:52:37,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-11-07 07:52:37,449 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:37,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:37,449 INFO L85 PathProgramCache]: Analyzing trace with hash -725090451, now seen corresponding path program 89 times [2021-11-07 07:52:37,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:37,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876724071] [2021-11-07 07:52:37,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:37,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:37,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:40,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:40,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:40,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876724071] [2021-11-07 07:52:40,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876724071] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:40,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724539803] [2021-11-07 07:52:40,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:52:40,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:40,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:52:40,355 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:52:40,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-11-07 07:52:43,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2021-11-07 07:52:43,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:52:43,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-07 07:52:43,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:52:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:43,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724539803] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:43,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:52:43,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 95 [2021-11-07 07:52:43,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283372719] [2021-11-07 07:52:43,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-11-07 07:52:43,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:43,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-11-07 07:52:43,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4283, Invalid=4647, Unknown=0, NotChecked=0, Total=8930 [2021-11-07 07:52:43,543 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 95 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:43,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:43,663 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2021-11-07 07:52:43,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-11-07 07:52:43,663 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 95 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2021-11-07 07:52:43,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:43,664 INFO L225 Difference]: With dead ends: 192 [2021-11-07 07:52:43,664 INFO L226 Difference]: Without dead ends: 188 [2021-11-07 07:52:43,665 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4288, Invalid=4832, Unknown=0, NotChecked=0, Total=9120 [2021-11-07 07:52:43,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-07 07:52:43,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2021-11-07 07:52:43,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.0053763440860215) internal successors, (187), 186 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 07:52:43,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2021-11-07 07:52:43,698 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2021-11-07 07:52:43,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:43,698 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2021-11-07 07:52:43,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 95 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:43,698 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2021-11-07 07:52:43,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-07 07:52:43,699 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:43,700 INFO L513 BasicCegarLoop]: trace histogram [90, 90, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:43,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-11-07 07:52:43,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:43,925 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:43,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:43,925 INFO L85 PathProgramCache]: Analyzing trace with hash -974078382, now seen corresponding path program 90 times [2021-11-07 07:52:43,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:43,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613369266] [2021-11-07 07:52:43,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:43,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:46,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:46,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:46,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613369266] [2021-11-07 07:52:46,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613369266] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:46,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503995916] [2021-11-07 07:52:46,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:52:46,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:46,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:52:46,829 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:52:46,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-11-07 07:52:49,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2021-11-07 07:52:49,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:52:49,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 94 conjunts are in the unsatisfiable core [2021-11-07 07:52:49,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:52:50,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:50,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503995916] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:50,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:52:50,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 96 [2021-11-07 07:52:50,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704009548] [2021-11-07 07:52:50,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-07 07:52:50,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:50,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-07 07:52:50,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4376, Invalid=4744, Unknown=0, NotChecked=0, Total=9120 [2021-11-07 07:52:50,184 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand has 96 states, 96 states have (on average 1.9895833333333333) internal successors, (191), 96 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:50,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:50,310 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2021-11-07 07:52:50,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-11-07 07:52:50,310 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.9895833333333333) internal successors, (191), 96 states have internal predecessors, (191), 0 states have call successors, (0), 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 186 [2021-11-07 07:52:50,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:50,311 INFO L225 Difference]: With dead ends: 194 [2021-11-07 07:52:50,311 INFO L226 Difference]: Without dead ends: 190 [2021-11-07 07:52:50,312 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4381, Invalid=4931, Unknown=0, NotChecked=0, Total=9312 [2021-11-07 07:52:50,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-07 07:52:50,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2021-11-07 07:52:50,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0053191489361701) internal successors, (189), 188 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:50,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2021-11-07 07:52:50,314 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2021-11-07 07:52:50,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:50,314 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2021-11-07 07:52:50,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.9895833333333333) internal successors, (191), 96 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:50,315 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2021-11-07 07:52:50,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-07 07:52:50,315 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:50,315 INFO L513 BasicCegarLoop]: trace histogram [91, 91, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:50,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-11-07 07:52:50,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:50,516 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:50,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:50,516 INFO L85 PathProgramCache]: Analyzing trace with hash 266688503, now seen corresponding path program 91 times [2021-11-07 07:52:50,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:50,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488951806] [2021-11-07 07:52:50,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:50,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:53,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:53,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:53,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488951806] [2021-11-07 07:52:53,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488951806] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:53,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354600832] [2021-11-07 07:52:53,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:52:53,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:53,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:52:53,504 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:52:53,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-11-07 07:52:56,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:56,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-07 07:52:56,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:52:56,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:56,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354600832] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:52:56,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:52:56,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 97 [2021-11-07 07:52:56,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292914255] [2021-11-07 07:52:56,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-07 07:52:56,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:56,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-07 07:52:56,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4470, Invalid=4842, Unknown=0, NotChecked=0, Total=9312 [2021-11-07 07:52:56,873 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand has 97 states, 97 states have (on average 1.9896907216494846) internal successors, (193), 97 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:57,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:57,013 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2021-11-07 07:52:57,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-07 07:52:57,014 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.9896907216494846) internal successors, (193), 97 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2021-11-07 07:52:57,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:57,015 INFO L225 Difference]: With dead ends: 196 [2021-11-07 07:52:57,015 INFO L226 Difference]: Without dead ends: 192 [2021-11-07 07:52:57,015 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4475, Invalid=5031, Unknown=0, NotChecked=0, Total=9506 [2021-11-07 07:52:57,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-07 07:52:57,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2021-11-07 07:52:57,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.0052631578947369) internal successors, (191), 190 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:57,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2021-11-07 07:52:57,019 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2021-11-07 07:52:57,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:57,019 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2021-11-07 07:52:57,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.9896907216494846) internal successors, (193), 97 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:57,019 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2021-11-07 07:52:57,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-07 07:52:57,020 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:57,020 INFO L513 BasicCegarLoop]: trace histogram [92, 92, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:57,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-11-07 07:52:57,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:52:57,221 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:57,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:57,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1357243300, now seen corresponding path program 92 times [2021-11-07 07:52:57,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:57,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149751993] [2021-11-07 07:52:57,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:57,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:00,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:00,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149751993] [2021-11-07 07:53:00,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149751993] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:00,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566198038] [2021-11-07 07:53:00,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:53:00,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:00,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:53:00,351 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:53:00,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-11-07 07:53:03,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:53:03,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:53:03,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 1049 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-07 07:53:03,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:03,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:03,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566198038] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:03,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:53:03,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 98 [2021-11-07 07:53:03,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149134485] [2021-11-07 07:53:03,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-07 07:53:03,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:53:03,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-07 07:53:03,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4565, Invalid=4941, Unknown=0, NotChecked=0, Total=9506 [2021-11-07 07:53:03,670 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand has 98 states, 98 states have (on average 1.989795918367347) internal successors, (195), 98 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:03,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:03,803 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2021-11-07 07:53:03,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-07 07:53:03,804 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.989795918367347) internal successors, (195), 98 states have internal predecessors, (195), 0 states have call successors, (0), 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 190 [2021-11-07 07:53:03,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:03,805 INFO L225 Difference]: With dead ends: 198 [2021-11-07 07:53:03,805 INFO L226 Difference]: Without dead ends: 194 [2021-11-07 07:53:03,806 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4570, Invalid=5132, Unknown=0, NotChecked=0, Total=9702 [2021-11-07 07:53:03,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-07 07:53:03,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2021-11-07 07:53:03,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.0052083333333333) internal successors, (193), 192 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:03,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2021-11-07 07:53:03,809 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2021-11-07 07:53:03,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:03,809 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2021-11-07 07:53:03,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.989795918367347) internal successors, (195), 98 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:03,809 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2021-11-07 07:53:03,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-07 07:53:03,810 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:03,810 INFO L513 BasicCegarLoop]: trace histogram [93, 93, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:03,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-11-07 07:53:04,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-11-07 07:53:04,025 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:53:04,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:04,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1412389761, now seen corresponding path program 93 times [2021-11-07 07:53:04,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:53:04,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186292950] [2021-11-07 07:53:04,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:04,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:53:04,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:07,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:07,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:07,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186292950] [2021-11-07 07:53:07,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186292950] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:07,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914943502] [2021-11-07 07:53:07,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:53:07,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:07,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:53:07,139 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:53:07,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-11-07 07:53:10,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2021-11-07 07:53:10,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:53:10,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 1060 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-07 07:53:10,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:10,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:10,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914943502] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:10,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:53:10,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 99 [2021-11-07 07:53:10,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497203289] [2021-11-07 07:53:10,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-07 07:53:10,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:53:10,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-07 07:53:10,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4661, Invalid=5041, Unknown=0, NotChecked=0, Total=9702 [2021-11-07 07:53:10,702 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand has 99 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 99 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:10,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:10,841 INFO L93 Difference]: Finished difference Result 200 states and 200 transitions. [2021-11-07 07:53:10,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-07 07:53:10,841 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 99 states have internal predecessors, (197), 0 states have call successors, (0), 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 07:53:10,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:10,842 INFO L225 Difference]: With dead ends: 200 [2021-11-07 07:53:10,842 INFO L226 Difference]: Without dead ends: 196 [2021-11-07 07:53:10,843 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4666, Invalid=5234, Unknown=0, NotChecked=0, Total=9900 [2021-11-07 07:53:10,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-07 07:53:10,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2021-11-07 07:53:10,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0051546391752577) internal successors, (195), 194 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:10,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2021-11-07 07:53:10,845 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2021-11-07 07:53:10,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:10,846 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2021-11-07 07:53:10,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 99 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:10,846 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2021-11-07 07:53:10,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-07 07:53:10,847 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:10,847 INFO L513 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:10,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-11-07 07:53:11,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:11,053 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:53:11,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:11,053 INFO L85 PathProgramCache]: Analyzing trace with hash 150037862, now seen corresponding path program 94 times [2021-11-07 07:53:11,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:53:11,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562543674] [2021-11-07 07:53:11,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:11,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:53:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:14,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:14,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562543674] [2021-11-07 07:53:14,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562543674] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:14,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759558855] [2021-11-07 07:53:14,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:53:14,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:14,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:53:14,214 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:53:14,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-11-07 07:53:17,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:53:17,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:53:17,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 1071 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-07 07:53:17,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:17,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:17,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759558855] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:17,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:53:17,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 100 [2021-11-07 07:53:17,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75634593] [2021-11-07 07:53:17,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-11-07 07:53:17,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:53:17,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-11-07 07:53:17,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4758, Invalid=5142, Unknown=0, NotChecked=0, Total=9900 [2021-11-07 07:53:17,667 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand has 100 states, 100 states have (on average 1.99) internal successors, (199), 100 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:17,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:17,804 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2021-11-07 07:53:17,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-11-07 07:53:17,804 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.99) internal successors, (199), 100 states have internal predecessors, (199), 0 states have call successors, (0), 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 194 [2021-11-07 07:53:17,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:17,806 INFO L225 Difference]: With dead ends: 202 [2021-11-07 07:53:17,806 INFO L226 Difference]: Without dead ends: 198 [2021-11-07 07:53:17,806 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4763, Invalid=5337, Unknown=0, NotChecked=0, Total=10100 [2021-11-07 07:53:17,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-07 07:53:17,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2021-11-07 07:53:17,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.0051020408163265) internal successors, (197), 196 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:17,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2021-11-07 07:53:17,810 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2021-11-07 07:53:17,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:17,811 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2021-11-07 07:53:17,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.99) internal successors, (199), 100 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:17,811 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2021-11-07 07:53:17,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-07 07:53:17,812 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:17,812 INFO L513 BasicCegarLoop]: trace histogram [95, 95, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:17,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-11-07 07:53:18,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:18,029 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:53:18,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:18,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1789359605, now seen corresponding path program 95 times [2021-11-07 07:53:18,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:53:18,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781562703] [2021-11-07 07:53:18,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:18,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:53:18,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:21,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:21,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:21,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781562703] [2021-11-07 07:53:21,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781562703] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:21,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592981574] [2021-11-07 07:53:21,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:53:21,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:21,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:53:21,252 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:53:21,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-11-07 07:53:24,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2021-11-07 07:53:24,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:53:24,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 1082 conjuncts, 99 conjunts are in the unsatisfiable core [2021-11-07 07:53:24,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:24,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:24,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592981574] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:24,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:53:24,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 101 [2021-11-07 07:53:24,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555167276] [2021-11-07 07:53:24,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-11-07 07:53:24,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:53:24,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-11-07 07:53:24,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4856, Invalid=5244, Unknown=0, NotChecked=0, Total=10100 [2021-11-07 07:53:24,851 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand has 101 states, 101 states have (on average 1.99009900990099) internal successors, (201), 101 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:24,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:24,986 INFO L93 Difference]: Finished difference Result 204 states and 204 transitions. [2021-11-07 07:53:24,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-11-07 07:53:24,986 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.99009900990099) internal successors, (201), 101 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2021-11-07 07:53:24,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:24,987 INFO L225 Difference]: With dead ends: 204 [2021-11-07 07:53:24,987 INFO L226 Difference]: Without dead ends: 200 [2021-11-07 07:53:24,988 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4861, Invalid=5441, Unknown=0, NotChecked=0, Total=10302 [2021-11-07 07:53:24,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-07 07:53:24,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2021-11-07 07:53:24,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.005050505050505) internal successors, (199), 198 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:24,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2021-11-07 07:53:24,991 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2021-11-07 07:53:24,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:24,991 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2021-11-07 07:53:24,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.99009900990099) internal successors, (201), 101 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:24,992 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2021-11-07 07:53:24,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-07 07:53:24,993 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:24,993 INFO L513 BasicCegarLoop]: trace histogram [96, 96, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:25,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-11-07 07:53:25,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-11-07 07:53:25,208 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:53:25,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:25,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1534518928, now seen corresponding path program 96 times [2021-11-07 07:53:25,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:53:25,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062405472] [2021-11-07 07:53:25,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:25,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:53:25,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:28,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:28,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:28,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062405472] [2021-11-07 07:53:28,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062405472] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:28,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45894540] [2021-11-07 07:53:28,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:53:28,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:28,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:53:28,788 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:53:28,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-11-07 07:53:32,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2021-11-07 07:53:32,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:53:32,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-07 07:53:32,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:32,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:32,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45894540] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:32,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:53:32,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 102 [2021-11-07 07:53:32,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929797859] [2021-11-07 07:53:32,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-11-07 07:53:32,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:53:32,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-11-07 07:53:32,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4955, Invalid=5347, Unknown=0, NotChecked=0, Total=10302 [2021-11-07 07:53:32,516 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand has 102 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 102 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:32,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:32,669 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2021-11-07 07:53:32,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-07 07:53:32,669 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 102 states have internal predecessors, (203), 0 states have call successors, (0), 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 198 [2021-11-07 07:53:32,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:32,670 INFO L225 Difference]: With dead ends: 206 [2021-11-07 07:53:32,670 INFO L226 Difference]: Without dead ends: 202 [2021-11-07 07:53:32,671 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4960, Invalid=5546, Unknown=0, NotChecked=0, Total=10506 [2021-11-07 07:53:32,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-07 07:53:32,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2021-11-07 07:53:32,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.005) internal successors, (201), 200 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:32,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2021-11-07 07:53:32,673 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2021-11-07 07:53:32,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:32,674 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2021-11-07 07:53:32,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 102 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:32,674 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2021-11-07 07:53:32,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-07 07:53:32,675 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:32,675 INFO L513 BasicCegarLoop]: trace histogram [97, 97, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:32,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-11-07 07:53:32,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:32,875 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:53:32,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:32,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1445764203, now seen corresponding path program 97 times [2021-11-07 07:53:32,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:53:32,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537707658] [2021-11-07 07:53:32,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:32,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:53:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:36,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 0 proven. 9409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:36,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:36,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537707658] [2021-11-07 07:53:36,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537707658] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:36,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981652379] [2021-11-07 07:53:36,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:53:36,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:36,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:53:36,241 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:53:36,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-11-07 07:53:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:39,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 1104 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-07 07:53:39,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 0 proven. 9409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:40,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981652379] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:40,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:53:40,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 103 [2021-11-07 07:53:40,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386702548] [2021-11-07 07:53:40,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-11-07 07:53:40,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:53:40,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-11-07 07:53:40,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5055, Invalid=5451, Unknown=0, NotChecked=0, Total=10506 [2021-11-07 07:53:40,025 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand has 103 states, 103 states have (on average 1.9902912621359223) internal successors, (205), 103 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:40,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:40,237 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2021-11-07 07:53:40,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-11-07 07:53:40,237 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.9902912621359223) internal successors, (205), 103 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-11-07 07:53:40,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:40,239 INFO L225 Difference]: With dead ends: 208 [2021-11-07 07:53:40,239 INFO L226 Difference]: Without dead ends: 204 [2021-11-07 07:53:40,240 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5060, Invalid=5652, Unknown=0, NotChecked=0, Total=10712 [2021-11-07 07:53:40,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-07 07:53:40,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2021-11-07 07:53:40,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.004950495049505) internal successors, (203), 202 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:40,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2021-11-07 07:53:40,246 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 200 [2021-11-07 07:53:40,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:40,246 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2021-11-07 07:53:40,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.9902912621359223) internal successors, (205), 103 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:40,247 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2021-11-07 07:53:40,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-07 07:53:40,248 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:40,248 INFO L513 BasicCegarLoop]: trace histogram [98, 98, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:40,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-11-07 07:53:40,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-11-07 07:53:40,465 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:53:40,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:40,465 INFO L85 PathProgramCache]: Analyzing trace with hash -2051819398, now seen corresponding path program 98 times [2021-11-07 07:53:40,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:53:40,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728084904] [2021-11-07 07:53:40,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:40,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:53:40,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:43,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:43,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:43,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728084904] [2021-11-07 07:53:43,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728084904] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:43,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540928003] [2021-11-07 07:53:43,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:53:43,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:43,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:53:43,966 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:53:43,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-11-07 07:53:47,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:53:47,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:53:47,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 102 conjunts are in the unsatisfiable core [2021-11-07 07:53:47,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:47,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:47,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540928003] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:47,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:53:47,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 104 [2021-11-07 07:53:47,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153235123] [2021-11-07 07:53:47,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-11-07 07:53:47,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:53:47,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-11-07 07:53:47,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2021-11-07 07:53:47,706 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand has 104 states, 104 states have (on average 1.9903846153846154) internal successors, (207), 104 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:47,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:47,840 INFO L93 Difference]: Finished difference Result 210 states and 210 transitions. [2021-11-07 07:53:47,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-11-07 07:53:47,840 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.9903846153846154) internal successors, (207), 104 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2021-11-07 07:53:47,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:47,841 INFO L225 Difference]: With dead ends: 210 [2021-11-07 07:53:47,841 INFO L226 Difference]: Without dead ends: 206 [2021-11-07 07:53:47,842 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5161, Invalid=5759, Unknown=0, NotChecked=0, Total=10920 [2021-11-07 07:53:47,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-07 07:53:47,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2021-11-07 07:53:47,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0049019607843137) internal successors, (205), 204 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:47,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2021-11-07 07:53:47,847 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 202 [2021-11-07 07:53:47,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:47,847 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2021-11-07 07:53:47,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.9903846153846154) internal successors, (207), 104 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:47,848 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2021-11-07 07:53:47,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-07 07:53:47,849 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:47,849 INFO L513 BasicCegarLoop]: trace histogram [99, 99, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:47,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-11-07 07:53:48,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:48,065 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:53:48,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:48,065 INFO L85 PathProgramCache]: Analyzing trace with hash -355309537, now seen corresponding path program 99 times [2021-11-07 07:53:48,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:53:48,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967202213] [2021-11-07 07:53:48,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:48,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:53:48,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:51,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:51,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:51,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967202213] [2021-11-07 07:53:51,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967202213] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:51,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822724170] [2021-11-07 07:53:51,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:53:51,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:51,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:53:51,552 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:53:51,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-11-07 07:53:54,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2021-11-07 07:53:54,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:53:54,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 1126 conjuncts, 103 conjunts are in the unsatisfiable core [2021-11-07 07:53:54,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:55,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822724170] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:55,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:53:55,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 105 [2021-11-07 07:53:55,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802962605] [2021-11-07 07:53:55,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-11-07 07:53:55,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:53:55,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-11-07 07:53:55,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5258, Invalid=5662, Unknown=0, NotChecked=0, Total=10920 [2021-11-07 07:53:55,517 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand has 105 states, 105 states have (on average 1.9904761904761905) internal successors, (209), 105 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:55,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:55,656 INFO L93 Difference]: Finished difference Result 212 states and 212 transitions. [2021-11-07 07:53:55,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-11-07 07:53:55,657 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.9904761904761905) internal successors, (209), 105 states have internal predecessors, (209), 0 states have call successors, (0), 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 204 [2021-11-07 07:53:55,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:55,658 INFO L225 Difference]: With dead ends: 212 [2021-11-07 07:53:55,658 INFO L226 Difference]: Without dead ends: 208 [2021-11-07 07:53:55,659 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5263, Invalid=5867, Unknown=0, NotChecked=0, Total=11130 [2021-11-07 07:53:55,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-07 07:53:55,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2021-11-07 07:53:55,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.0048543689320388) internal successors, (207), 206 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:55,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2021-11-07 07:53:55,664 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 204 [2021-11-07 07:53:55,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:55,664 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2021-11-07 07:53:55,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.9904761904761905) internal successors, (209), 105 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:55,664 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2021-11-07 07:53:55,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-07 07:53:55,665 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:55,666 INFO L513 BasicCegarLoop]: trace histogram [100, 100, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:55,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-11-07 07:53:55,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-11-07 07:53:55,881 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:53:55,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:55,881 INFO L85 PathProgramCache]: Analyzing trace with hash -2096905596, now seen corresponding path program 100 times [2021-11-07 07:53:55,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:53:55,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42938807] [2021-11-07 07:53:55,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:55,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:53:56,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:59,572 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 10000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:59,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:59,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42938807] [2021-11-07 07:53:59,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42938807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:59,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362993138] [2021-11-07 07:53:59,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:53:59,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:59,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:53:59,590 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:53:59,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-11-07 07:54:02,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:54:02,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:54:02,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 1137 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-07 07:54:02,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:03,422 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 10000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:54:03,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362993138] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:03,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:03,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 106 [2021-11-07 07:54:03,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840731952] [2021-11-07 07:54:03,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-11-07 07:54:03,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:03,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-11-07 07:54:03,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5361, Invalid=5769, Unknown=0, NotChecked=0, Total=11130 [2021-11-07 07:54:03,425 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand has 106 states, 106 states have (on average 1.990566037735849) internal successors, (211), 106 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 07:54:03,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:03,565 INFO L93 Difference]: Finished difference Result 214 states and 214 transitions. [2021-11-07 07:54:03,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-07 07:54:03,565 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.990566037735849) internal successors, (211), 106 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 206 [2021-11-07 07:54:03,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:03,566 INFO L225 Difference]: With dead ends: 214 [2021-11-07 07:54:03,566 INFO L226 Difference]: Without dead ends: 210 [2021-11-07 07:54:03,566 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5366, Invalid=5976, Unknown=0, NotChecked=0, Total=11342 [2021-11-07 07:54:03,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-07 07:54:03,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2021-11-07 07:54:03,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.0048076923076923) internal successors, (209), 208 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:03,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2021-11-07 07:54:03,569 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 206 [2021-11-07 07:54:03,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:03,569 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2021-11-07 07:54:03,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.990566037735849) internal successors, (211), 106 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 07:54:03,569 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2021-11-07 07:54:03,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-07 07:54:03,570 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:03,570 INFO L513 BasicCegarLoop]: trace histogram [101, 101, 1, 1, 1, 1, 1, 1] [2021-11-07 07:54:03,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-11-07 07:54:03,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-11-07 07:54:03,771 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:54:03,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:03,771 INFO L85 PathProgramCache]: Analyzing trace with hash -733472855, now seen corresponding path program 101 times [2021-11-07 07:54:03,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:03,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144100543] [2021-11-07 07:54:03,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:03,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:07,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 0 proven. 10201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:54:07,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:07,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144100543] [2021-11-07 07:54:07,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144100543] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:07,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975776268] [2021-11-07 07:54:07,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:54:07,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:07,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:07,486 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:07,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-11-07 07:54:11,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2021-11-07 07:54:11,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:54:11,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 1148 conjuncts, 105 conjunts are in the unsatisfiable core [2021-11-07 07:54:11,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 0 proven. 10201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:54:11,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975776268] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:11,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:11,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 107 [2021-11-07 07:54:11,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104279439] [2021-11-07 07:54:11,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-11-07 07:54:11,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:11,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-11-07 07:54:11,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5465, Invalid=5877, Unknown=0, NotChecked=0, Total=11342 [2021-11-07 07:54:11,748 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand has 107 states, 107 states have (on average 1.9906542056074767) internal successors, (213), 107 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:11,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:11,895 INFO L93 Difference]: Finished difference Result 216 states and 216 transitions. [2021-11-07 07:54:11,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-11-07 07:54:11,895 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.9906542056074767) internal successors, (213), 107 states have internal predecessors, (213), 0 states have call successors, (0), 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 07:54:11,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:11,896 INFO L225 Difference]: With dead ends: 216 [2021-11-07 07:54:11,896 INFO L226 Difference]: Without dead ends: 212 [2021-11-07 07:54:11,896 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5470, Invalid=6086, Unknown=0, NotChecked=0, Total=11556 [2021-11-07 07:54:11,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-07 07:54:11,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2021-11-07 07:54:11,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.0047619047619047) internal successors, (211), 210 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 07:54:11,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2021-11-07 07:54:11,899 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 208 [2021-11-07 07:54:11,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:11,900 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2021-11-07 07:54:11,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.9906542056074767) internal successors, (213), 107 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:11,900 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2021-11-07 07:54:11,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-07 07:54:11,901 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:11,901 INFO L513 BasicCegarLoop]: trace histogram [102, 102, 1, 1, 1, 1, 1, 1] [2021-11-07 07:54:11,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-11-07 07:54:12,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-11-07 07:54:12,116 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:54:12,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:12,116 INFO L85 PathProgramCache]: Analyzing trace with hash -439634034, now seen corresponding path program 102 times [2021-11-07 07:54:12,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:12,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218802214] [2021-11-07 07:54:12,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:12,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:12,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:54:16,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:16,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218802214] [2021-11-07 07:54:16,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218802214] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:16,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337432996] [2021-11-07 07:54:16,122 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:54:16,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:16,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:16,154 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:16,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-11-07 07:54:19,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2021-11-07 07:54:19,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:54:19,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 1159 conjuncts, 106 conjunts are in the unsatisfiable core [2021-11-07 07:54:19,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:20,352 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:54:20,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337432996] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:20,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:20,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 108 [2021-11-07 07:54:20,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103335103] [2021-11-07 07:54:20,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-11-07 07:54:20,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:20,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-11-07 07:54:20,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5570, Invalid=5986, Unknown=0, NotChecked=0, Total=11556 [2021-11-07 07:54:20,356 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand has 108 states, 108 states have (on average 1.9907407407407407) internal successors, (215), 108 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:20,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:20,507 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2021-11-07 07:54:20,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-11-07 07:54:20,507 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.9907407407407407) internal successors, (215), 108 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 210 [2021-11-07 07:54:20,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:20,508 INFO L225 Difference]: With dead ends: 218 [2021-11-07 07:54:20,508 INFO L226 Difference]: Without dead ends: 214 [2021-11-07 07:54:20,508 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5575, Invalid=6197, Unknown=0, NotChecked=0, Total=11772 [2021-11-07 07:54:20,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-07 07:54:20,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2021-11-07 07:54:20,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.0047169811320755) internal successors, (213), 212 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:20,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2021-11-07 07:54:20,534 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 210 [2021-11-07 07:54:20,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:20,534 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2021-11-07 07:54:20,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.9907407407407407) internal successors, (215), 108 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:20,534 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2021-11-07 07:54:20,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-07 07:54:20,535 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:20,535 INFO L513 BasicCegarLoop]: trace histogram [103, 103, 1, 1, 1, 1, 1, 1] [2021-11-07 07:54:20,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-11-07 07:54:20,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-11-07 07:54:20,735 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:54:20,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:20,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1528368589, now seen corresponding path program 103 times [2021-11-07 07:54:20,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:20,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490192301] [2021-11-07 07:54:20,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:20,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:20,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:24,478 INFO L134 CoverageAnalysis]: Checked inductivity of 10609 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:54:24,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:24,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490192301] [2021-11-07 07:54:24,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490192301] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:24,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151862583] [2021-11-07 07:54:24,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:54:24,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:24,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:24,479 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:24,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-11-07 07:54:28,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:28,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 107 conjunts are in the unsatisfiable core [2021-11-07 07:54:28,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10609 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:54:28,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151862583] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:28,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:28,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 109 [2021-11-07 07:54:28,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701405975] [2021-11-07 07:54:28,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-11-07 07:54:28,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:28,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-11-07 07:54:28,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5676, Invalid=6096, Unknown=0, NotChecked=0, Total=11772 [2021-11-07 07:54:28,599 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand has 109 states, 109 states have (on average 1.9908256880733946) internal successors, (217), 109 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 07:54:28,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:28,744 INFO L93 Difference]: Finished difference Result 220 states and 220 transitions. [2021-11-07 07:54:28,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-11-07 07:54:28,744 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.9908256880733946) internal successors, (217), 109 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 212 [2021-11-07 07:54:28,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:28,745 INFO L225 Difference]: With dead ends: 220 [2021-11-07 07:54:28,745 INFO L226 Difference]: Without dead ends: 216 [2021-11-07 07:54:28,745 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5681, Invalid=6309, Unknown=0, NotChecked=0, Total=11990 [2021-11-07 07:54:28,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-07 07:54:28,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2021-11-07 07:54:28,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.0046728971962617) internal successors, (215), 214 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:28,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2021-11-07 07:54:28,748 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 212 [2021-11-07 07:54:28,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:28,748 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2021-11-07 07:54:28,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.9908256880733946) internal successors, (217), 109 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 07:54:28,748 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2021-11-07 07:54:28,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-07 07:54:28,749 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:28,749 INFO L513 BasicCegarLoop]: trace histogram [104, 104, 1, 1, 1, 1, 1, 1] [2021-11-07 07:54:28,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-11-07 07:54:28,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-11-07 07:54:28,950 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:54:28,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:28,951 INFO L85 PathProgramCache]: Analyzing trace with hash 169744280, now seen corresponding path program 104 times [2021-11-07 07:54:28,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:28,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967425949] [2021-11-07 07:54:28,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:28,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:32,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:54:32,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:32,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967425949] [2021-11-07 07:54:32,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967425949] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:32,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280451560] [2021-11-07 07:54:32,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:54:32,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:32,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:32,762 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:32,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-11-07 07:54:36,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:54:36,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:54:36,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 1181 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-07 07:54:36,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:54:36,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280451560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:36,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:36,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 110 [2021-11-07 07:54:36,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22811121] [2021-11-07 07:54:36,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2021-11-07 07:54:36,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:36,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-11-07 07:54:36,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5783, Invalid=6207, Unknown=0, NotChecked=0, Total=11990 [2021-11-07 07:54:36,947 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand has 110 states, 110 states have (on average 1.990909090909091) internal successors, (219), 110 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:37,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:37,124 INFO L93 Difference]: Finished difference Result 222 states and 222 transitions. [2021-11-07 07:54:37,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-11-07 07:54:37,124 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.990909090909091) internal successors, (219), 110 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 214 [2021-11-07 07:54:37,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:37,125 INFO L225 Difference]: With dead ends: 222 [2021-11-07 07:54:37,125 INFO L226 Difference]: Without dead ends: 218 [2021-11-07 07:54:37,125 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5788, Invalid=6422, Unknown=0, NotChecked=0, Total=12210 [2021-11-07 07:54:37,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-07 07:54:37,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2021-11-07 07:54:37,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.0046296296296295) internal successors, (217), 216 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 07:54:37,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2021-11-07 07:54:37,133 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 214 [2021-11-07 07:54:37,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:37,134 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2021-11-07 07:54:37,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.990909090909091) internal successors, (219), 110 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:37,134 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2021-11-07 07:54:37,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-07 07:54:37,135 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:37,135 INFO L513 BasicCegarLoop]: trace histogram [105, 105, 1, 1, 1, 1, 1, 1] [2021-11-07 07:54:37,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-11-07 07:54:37,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-11-07 07:54:37,357 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:54:37,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:37,357 INFO L85 PathProgramCache]: Analyzing trace with hash -31361091, now seen corresponding path program 105 times [2021-11-07 07:54:37,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:37,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466076701] [2021-11-07 07:54:37,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:37,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:41,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 0 proven. 11025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:54:41,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:41,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466076701] [2021-11-07 07:54:41,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466076701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:41,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071850891] [2021-11-07 07:54:41,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:54:41,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:41,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:41,236 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:41,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-11-07 07:54:45,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 106 check-sat command(s) [2021-11-07 07:54:45,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:54:45,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 1192 conjuncts, 109 conjunts are in the unsatisfiable core [2021-11-07 07:54:45,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 0 proven. 11025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:54:45,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071850891] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:45,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:45,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 111 [2021-11-07 07:54:45,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28967992] [2021-11-07 07:54:45,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2021-11-07 07:54:45,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:45,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-11-07 07:54:45,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5891, Invalid=6319, Unknown=0, NotChecked=0, Total=12210 [2021-11-07 07:54:45,646 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand has 111 states, 111 states have (on average 1.990990990990991) internal successors, (221), 111 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 07:54:45,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:45,795 INFO L93 Difference]: Finished difference Result 224 states and 224 transitions. [2021-11-07 07:54:45,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-11-07 07:54:45,796 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.990990990990991) internal successors, (221), 111 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 216 [2021-11-07 07:54:45,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:45,796 INFO L225 Difference]: With dead ends: 224 [2021-11-07 07:54:45,796 INFO L226 Difference]: Without dead ends: 220 [2021-11-07 07:54:45,797 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5896, Invalid=6536, Unknown=0, NotChecked=0, Total=12432 [2021-11-07 07:54:45,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-07 07:54:45,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 219. [2021-11-07 07:54:45,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.0045871559633028) internal successors, (219), 218 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:45,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2021-11-07 07:54:45,799 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 216 [2021-11-07 07:54:45,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:45,800 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2021-11-07 07:54:45,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.990990990990991) internal successors, (221), 111 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 07:54:45,800 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2021-11-07 07:54:45,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-07 07:54:45,800 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:45,801 INFO L513 BasicCegarLoop]: trace histogram [106, 106, 1, 1, 1, 1, 1, 1] [2021-11-07 07:54:45,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-11-07 07:54:46,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:46,001 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:54:46,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:46,001 INFO L85 PathProgramCache]: Analyzing trace with hash -20094302, now seen corresponding path program 106 times [2021-11-07 07:54:46,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:46,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095532686] [2021-11-07 07:54:46,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:46,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:50,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 0 proven. 11236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:54:50,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:50,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095532686] [2021-11-07 07:54:50,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095532686] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:50,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101261929] [2021-11-07 07:54:50,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:54:50,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:50,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:50,070 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:50,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-11-07 07:54:53,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:54:53,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:54:53,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 1203 conjuncts, 110 conjunts are in the unsatisfiable core [2021-11-07 07:54:53,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:54,321 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 0 proven. 11236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:54:54,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101261929] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:54,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:54,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 112 [2021-11-07 07:54:54,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046310437] [2021-11-07 07:54:54,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2021-11-07 07:54:54,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:54,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-11-07 07:54:54,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6000, Invalid=6432, Unknown=0, NotChecked=0, Total=12432 [2021-11-07 07:54:54,323 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand has 112 states, 112 states have (on average 1.9910714285714286) internal successors, (223), 112 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:54,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:54,495 INFO L93 Difference]: Finished difference Result 226 states and 226 transitions. [2021-11-07 07:54:54,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-11-07 07:54:54,496 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.9910714285714286) internal successors, (223), 112 states have internal predecessors, (223), 0 states have call successors, (0), 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 218 [2021-11-07 07:54:54,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:54,496 INFO L225 Difference]: With dead ends: 226 [2021-11-07 07:54:54,496 INFO L226 Difference]: Without dead ends: 222 [2021-11-07 07:54:54,497 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=6005, Invalid=6651, Unknown=0, NotChecked=0, Total=12656 [2021-11-07 07:54:54,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-07 07:54:54,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2021-11-07 07:54:54,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.0045454545454546) internal successors, (221), 220 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 07:54:54,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2021-11-07 07:54:54,499 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 218 [2021-11-07 07:54:54,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:54,499 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2021-11-07 07:54:54,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.9910714285714286) internal successors, (223), 112 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:54:54,500 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2021-11-07 07:54:54,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-07 07:54:54,500 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:54,500 INFO L513 BasicCegarLoop]: trace histogram [107, 107, 1, 1, 1, 1, 1, 1] [2021-11-07 07:54:54,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-11-07 07:54:54,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:54,701 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:54:54,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:54,701 INFO L85 PathProgramCache]: Analyzing trace with hash -2077611961, now seen corresponding path program 107 times [2021-11-07 07:54:54,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:54,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760957229] [2021-11-07 07:54:54,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:54,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:58,704 INFO L134 CoverageAnalysis]: Checked inductivity of 11449 backedges. 0 proven. 11449 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:54:58,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:58,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760957229] [2021-11-07 07:54:58,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760957229] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:58,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802886913] [2021-11-07 07:54:58,705 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:54:58,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:58,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:58,706 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:58,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-11-07 07:55:02,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 108 check-sat command(s) [2021-11-07 07:55:02,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:02,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 111 conjunts are in the unsatisfiable core [2021-11-07 07:55:02,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11449 backedges. 0 proven. 11449 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:55:03,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802886913] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:03,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:03,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 113 [2021-11-07 07:55:03,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928496080] [2021-11-07 07:55:03,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2021-11-07 07:55:03,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:03,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-11-07 07:55:03,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6110, Invalid=6546, Unknown=0, NotChecked=0, Total=12656 [2021-11-07 07:55:03,148 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand has 113 states, 113 states have (on average 1.991150442477876) internal successors, (225), 113 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:03,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:03,329 INFO L93 Difference]: Finished difference Result 228 states and 228 transitions. [2021-11-07 07:55:03,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-11-07 07:55:03,329 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.991150442477876) internal successors, (225), 113 states have internal predecessors, (225), 0 states have call successors, (0), 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 220 [2021-11-07 07:55:03,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:03,330 INFO L225 Difference]: With dead ends: 228 [2021-11-07 07:55:03,330 INFO L226 Difference]: Without dead ends: 224 [2021-11-07 07:55:03,332 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=6115, Invalid=6767, Unknown=0, NotChecked=0, Total=12882 [2021-11-07 07:55:03,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-11-07 07:55:03,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2021-11-07 07:55:03,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.0045045045045045) internal successors, (223), 222 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:03,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2021-11-07 07:55:03,336 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 220 [2021-11-07 07:55:03,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:03,336 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2021-11-07 07:55:03,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.991150442477876) internal successors, (225), 113 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:03,337 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2021-11-07 07:55:03,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-07 07:55:03,338 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:03,338 INFO L513 BasicCegarLoop]: trace histogram [108, 108, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:03,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:03,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-11-07 07:55:03,553 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:03,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:03,553 INFO L85 PathProgramCache]: Analyzing trace with hash 627841196, now seen corresponding path program 108 times [2021-11-07 07:55:03,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:03,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496649964] [2021-11-07 07:55:03,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:03,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:07,769 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 0 proven. 11664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:55:07,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:07,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496649964] [2021-11-07 07:55:07,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496649964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:07,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136812945] [2021-11-07 07:55:07,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:55:07,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:07,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:07,770 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:07,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-11-07 07:55:11,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 109 check-sat command(s) [2021-11-07 07:55:11,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:11,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 1225 conjuncts, 112 conjunts are in the unsatisfiable core [2021-11-07 07:55:11,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:12,420 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 0 proven. 11664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:55:12,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136812945] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:12,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:12,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 114 [2021-11-07 07:55:12,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381701896] [2021-11-07 07:55:12,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2021-11-07 07:55:12,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:12,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-11-07 07:55:12,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6221, Invalid=6661, Unknown=0, NotChecked=0, Total=12882 [2021-11-07 07:55:12,423 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand has 114 states, 114 states have (on average 1.9912280701754386) internal successors, (227), 114 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:12,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:12,581 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2021-11-07 07:55:12,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-11-07 07:55:12,582 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.9912280701754386) internal successors, (227), 114 states have internal predecessors, (227), 0 states have call successors, (0), 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 222 [2021-11-07 07:55:12,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:12,582 INFO L225 Difference]: With dead ends: 230 [2021-11-07 07:55:12,582 INFO L226 Difference]: Without dead ends: 226 [2021-11-07 07:55:12,583 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=6226, Invalid=6884, Unknown=0, NotChecked=0, Total=13110 [2021-11-07 07:55:12,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-07 07:55:12,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 225. [2021-11-07 07:55:12,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.0044642857142858) internal successors, (225), 224 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:12,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 225 transitions. [2021-11-07 07:55:12,585 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 225 transitions. Word has length 222 [2021-11-07 07:55:12,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:12,585 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 225 transitions. [2021-11-07 07:55:12,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.9912280701754386) internal successors, (227), 114 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:12,586 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 225 transitions. [2021-11-07 07:55:12,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-07 07:55:12,586 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:12,586 INFO L513 BasicCegarLoop]: trace histogram [109, 109, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:12,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:12,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:12,787 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:12,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:12,787 INFO L85 PathProgramCache]: Analyzing trace with hash 2113110993, now seen corresponding path program 109 times [2021-11-07 07:55:12,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:12,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446380102] [2021-11-07 07:55:12,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:12,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:16,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 0 proven. 11881 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:55:16,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:16,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446380102] [2021-11-07 07:55:16,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446380102] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:16,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646205930] [2021-11-07 07:55:16,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:55:16,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:16,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:16,966 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:16,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-11-07 07:55:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:20,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 1236 conjuncts, 113 conjunts are in the unsatisfiable core [2021-11-07 07:55:20,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:21,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 0 proven. 11881 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:55:21,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646205930] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:21,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:21,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 115 [2021-11-07 07:55:21,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841047140] [2021-11-07 07:55:21,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2021-11-07 07:55:21,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:21,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-11-07 07:55:21,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6333, Invalid=6777, Unknown=0, NotChecked=0, Total=13110 [2021-11-07 07:55:21,409 INFO L87 Difference]: Start difference. First operand 225 states and 225 transitions. Second operand has 115 states, 115 states have (on average 1.991304347826087) internal successors, (229), 115 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:21,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:21,572 INFO L93 Difference]: Finished difference Result 232 states and 232 transitions. [2021-11-07 07:55:21,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-11-07 07:55:21,572 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.991304347826087) internal successors, (229), 115 states have internal predecessors, (229), 0 states have call successors, (0), 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 224 [2021-11-07 07:55:21,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:21,573 INFO L225 Difference]: With dead ends: 232 [2021-11-07 07:55:21,573 INFO L226 Difference]: Without dead ends: 228 [2021-11-07 07:55:21,574 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=6338, Invalid=7002, Unknown=0, NotChecked=0, Total=13340 [2021-11-07 07:55:21,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-07 07:55:21,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2021-11-07 07:55:21,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.0044247787610618) internal successors, (227), 226 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:21,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2021-11-07 07:55:21,576 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 224 [2021-11-07 07:55:21,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:21,576 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2021-11-07 07:55:21,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.991304347826087) internal successors, (229), 115 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:21,577 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2021-11-07 07:55:21,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-07 07:55:21,577 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:21,577 INFO L513 BasicCegarLoop]: trace histogram [110, 110, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:21,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-11-07 07:55:21,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:21,778 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:21,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:21,778 INFO L85 PathProgramCache]: Analyzing trace with hash -766723658, now seen corresponding path program 110 times [2021-11-07 07:55:21,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:21,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485957132] [2021-11-07 07:55:21,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:21,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:26,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 0 proven. 12100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:55:26,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:26,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485957132] [2021-11-07 07:55:26,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485957132] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:26,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761891745] [2021-11-07 07:55:26,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:55:26,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:26,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:26,033 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:26,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-11-07 07:55:30,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:55:30,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:30,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 1247 conjuncts, 114 conjunts are in the unsatisfiable core [2021-11-07 07:55:30,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 0 proven. 12100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:55:30,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761891745] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:30,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:30,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 116 [2021-11-07 07:55:30,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830223048] [2021-11-07 07:55:30,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-11-07 07:55:30,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:30,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-11-07 07:55:30,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6446, Invalid=6894, Unknown=0, NotChecked=0, Total=13340 [2021-11-07 07:55:30,576 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand has 116 states, 116 states have (on average 1.9913793103448276) internal successors, (231), 116 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:30,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:30,747 INFO L93 Difference]: Finished difference Result 234 states and 234 transitions. [2021-11-07 07:55:30,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-11-07 07:55:30,748 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.9913793103448276) internal successors, (231), 116 states have internal predecessors, (231), 0 states have call successors, (0), 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 226 [2021-11-07 07:55:30,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:30,748 INFO L225 Difference]: With dead ends: 234 [2021-11-07 07:55:30,748 INFO L226 Difference]: Without dead ends: 230 [2021-11-07 07:55:30,749 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=6451, Invalid=7121, Unknown=0, NotChecked=0, Total=13572 [2021-11-07 07:55:30,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-07 07:55:30,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2021-11-07 07:55:30,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.0043859649122806) internal successors, (229), 228 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:30,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 229 transitions. [2021-11-07 07:55:30,752 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 229 transitions. Word has length 226 [2021-11-07 07:55:30,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:30,752 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 229 transitions. [2021-11-07 07:55:30,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.9913793103448276) internal successors, (231), 116 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:30,752 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 229 transitions. [2021-11-07 07:55:30,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-07 07:55:30,753 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:30,753 INFO L513 BasicCegarLoop]: trace histogram [111, 111, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:30,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:30,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-11-07 07:55:30,953 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:30,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:30,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1966082651, now seen corresponding path program 111 times [2021-11-07 07:55:30,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:30,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625437981] [2021-11-07 07:55:30,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:30,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:35,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12321 backedges. 0 proven. 12321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:55:35,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:35,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625437981] [2021-11-07 07:55:35,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625437981] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:35,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306570040] [2021-11-07 07:55:35,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:55:35,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:35,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:35,208 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:35,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-11-07 07:55:39,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 112 check-sat command(s) [2021-11-07 07:55:39,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:39,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 1258 conjuncts, 115 conjunts are in the unsatisfiable core [2021-11-07 07:55:39,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:40,058 INFO L134 CoverageAnalysis]: Checked inductivity of 12321 backedges. 0 proven. 12321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:55:40,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306570040] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:40,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:40,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 117 [2021-11-07 07:55:40,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623612221] [2021-11-07 07:55:40,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2021-11-07 07:55:40,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:40,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2021-11-07 07:55:40,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6560, Invalid=7012, Unknown=0, NotChecked=0, Total=13572 [2021-11-07 07:55:40,061 INFO L87 Difference]: Start difference. First operand 229 states and 229 transitions. Second operand has 117 states, 117 states have (on average 1.9914529914529915) internal successors, (233), 117 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:40,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:40,245 INFO L93 Difference]: Finished difference Result 236 states and 236 transitions. [2021-11-07 07:55:40,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-11-07 07:55:40,246 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.9914529914529915) internal successors, (233), 117 states have internal predecessors, (233), 0 states have call successors, (0), 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 228 [2021-11-07 07:55:40,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:40,246 INFO L225 Difference]: With dead ends: 236 [2021-11-07 07:55:40,246 INFO L226 Difference]: Without dead ends: 232 [2021-11-07 07:55:40,248 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=6565, Invalid=7241, Unknown=0, NotChecked=0, Total=13806 [2021-11-07 07:55:40,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-07 07:55:40,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2021-11-07 07:55:40,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.0043478260869565) internal successors, (231), 230 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:40,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 231 transitions. [2021-11-07 07:55:40,250 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 231 transitions. Word has length 228 [2021-11-07 07:55:40,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:40,250 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 231 transitions. [2021-11-07 07:55:40,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.9914529914529915) internal successors, (233), 117 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:40,251 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 231 transitions. [2021-11-07 07:55:40,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-07 07:55:40,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:40,251 INFO L513 BasicCegarLoop]: trace histogram [112, 112, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:40,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-11-07 07:55:40,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-11-07 07:55:40,452 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:40,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:40,452 INFO L85 PathProgramCache]: Analyzing trace with hash -327039552, now seen corresponding path program 112 times [2021-11-07 07:55:40,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:40,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241145767] [2021-11-07 07:55:40,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:40,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:40,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:44,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 0 proven. 12544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:55:44,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:44,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241145767] [2021-11-07 07:55:44,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241145767] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:44,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137395521] [2021-11-07 07:55:44,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:55:44,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:44,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:44,850 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:44,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-11-07 07:55:48,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:55:48,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:48,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 1269 conjuncts, 116 conjunts are in the unsatisfiable core [2021-11-07 07:55:48,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:49,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 0 proven. 12544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:55:49,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137395521] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:49,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:49,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 118 [2021-11-07 07:55:49,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180789611] [2021-11-07 07:55:49,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2021-11-07 07:55:49,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:49,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-11-07 07:55:49,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6675, Invalid=7131, Unknown=0, NotChecked=0, Total=13806 [2021-11-07 07:55:49,583 INFO L87 Difference]: Start difference. First operand 231 states and 231 transitions. Second operand has 118 states, 118 states have (on average 1.9915254237288136) internal successors, (235), 118 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:49,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:49,767 INFO L93 Difference]: Finished difference Result 238 states and 238 transitions. [2021-11-07 07:55:49,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-11-07 07:55:49,767 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.9915254237288136) internal successors, (235), 118 states have internal predecessors, (235), 0 states have call successors, (0), 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 230 [2021-11-07 07:55:49,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:49,768 INFO L225 Difference]: With dead ends: 238 [2021-11-07 07:55:49,768 INFO L226 Difference]: Without dead ends: 234 [2021-11-07 07:55:49,769 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6680, Invalid=7362, Unknown=0, NotChecked=0, Total=14042 [2021-11-07 07:55:49,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-07 07:55:49,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2021-11-07 07:55:49,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.0043103448275863) internal successors, (233), 232 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:49,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2021-11-07 07:55:49,771 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 230 [2021-11-07 07:55:49,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:49,772 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2021-11-07 07:55:49,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.9915254237288136) internal successors, (235), 118 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:49,772 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2021-11-07 07:55:49,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-07 07:55:49,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:49,773 INFO L513 BasicCegarLoop]: trace histogram [113, 113, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:49,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-11-07 07:55:49,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-11-07 07:55:49,981 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:49,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:49,981 INFO L85 PathProgramCache]: Analyzing trace with hash -699253787, now seen corresponding path program 113 times [2021-11-07 07:55:49,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:49,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981893566] [2021-11-07 07:55:49,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:49,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:54,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12769 backedges. 0 proven. 12769 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:55:54,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:54,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981893566] [2021-11-07 07:55:54,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981893566] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:54,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007641867] [2021-11-07 07:55:54,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:55:54,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:54,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:54,384 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:54,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-11-07 07:55:58,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 114 check-sat command(s) [2021-11-07 07:55:58,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:55:58,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 1280 conjuncts, 117 conjunts are in the unsatisfiable core [2021-11-07 07:55:58,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12769 backedges. 0 proven. 12769 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:55:59,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007641867] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:59,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:55:59,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 119 [2021-11-07 07:55:59,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324719021] [2021-11-07 07:55:59,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-11-07 07:55:59,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:59,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-11-07 07:55:59,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6791, Invalid=7251, Unknown=0, NotChecked=0, Total=14042 [2021-11-07 07:55:59,374 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand has 119 states, 119 states have (on average 1.9915966386554622) internal successors, (237), 119 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:59,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:59,553 INFO L93 Difference]: Finished difference Result 240 states and 240 transitions. [2021-11-07 07:55:59,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-11-07 07:55:59,553 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.9915966386554622) internal successors, (237), 119 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 232 [2021-11-07 07:55:59,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:59,554 INFO L225 Difference]: With dead ends: 240 [2021-11-07 07:55:59,554 INFO L226 Difference]: Without dead ends: 236 [2021-11-07 07:55:59,555 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6796, Invalid=7484, Unknown=0, NotChecked=0, Total=14280 [2021-11-07 07:55:59,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-07 07:55:59,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2021-11-07 07:55:59,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.0042735042735043) internal successors, (235), 234 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:59,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2021-11-07 07:55:59,558 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 232 [2021-11-07 07:55:59,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:59,558 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2021-11-07 07:55:59,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.9915966386554622) internal successors, (237), 119 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:55:59,559 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2021-11-07 07:55:59,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-11-07 07:55:59,559 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:59,559 INFO L513 BasicCegarLoop]: trace histogram [114, 114, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:59,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:59,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-11-07 07:55:59,760 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:55:59,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:59,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1914848054, now seen corresponding path program 114 times [2021-11-07 07:55:59,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:59,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124394091] [2021-11-07 07:55:59,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:59,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:59,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12996 backedges. 0 proven. 12996 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:04,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:04,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124394091] [2021-11-07 07:56:04,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124394091] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:04,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310509502] [2021-11-07 07:56:04,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:56:04,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:04,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:04,298 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:04,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-11-07 07:56:08,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 115 check-sat command(s) [2021-11-07 07:56:08,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:08,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 1291 conjuncts, 118 conjunts are in the unsatisfiable core [2021-11-07 07:56:08,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:09,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12996 backedges. 0 proven. 12996 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:09,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310509502] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:09,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:09,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118] total 120 [2021-11-07 07:56:09,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520875228] [2021-11-07 07:56:09,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2021-11-07 07:56:09,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:09,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-11-07 07:56:09,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6908, Invalid=7372, Unknown=0, NotChecked=0, Total=14280 [2021-11-07 07:56:09,389 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand has 120 states, 120 states have (on average 1.9916666666666667) internal successors, (239), 120 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:56:09,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:09,572 INFO L93 Difference]: Finished difference Result 242 states and 242 transitions. [2021-11-07 07:56:09,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-11-07 07:56:09,572 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.9916666666666667) internal successors, (239), 120 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2021-11-07 07:56:09,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:09,573 INFO L225 Difference]: With dead ends: 242 [2021-11-07 07:56:09,573 INFO L226 Difference]: Without dead ends: 238 [2021-11-07 07:56:09,574 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6913, Invalid=7607, Unknown=0, NotChecked=0, Total=14520 [2021-11-07 07:56:09,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-07 07:56:09,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 237. [2021-11-07 07:56:09,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.0042372881355932) internal successors, (237), 236 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:56:09,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2021-11-07 07:56:09,576 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 234 [2021-11-07 07:56:09,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:09,576 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2021-11-07 07:56:09,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 1.9916666666666667) internal successors, (239), 120 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:56:09,577 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2021-11-07 07:56:09,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-07 07:56:09,577 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:09,577 INFO L513 BasicCegarLoop]: trace histogram [115, 115, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:09,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-11-07 07:56:09,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:09,778 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:09,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:09,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1869834129, now seen corresponding path program 115 times [2021-11-07 07:56:09,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:09,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449174579] [2021-11-07 07:56:09,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:09,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:14,357 INFO L134 CoverageAnalysis]: Checked inductivity of 13225 backedges. 0 proven. 13225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:14,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:14,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449174579] [2021-11-07 07:56:14,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449174579] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:14,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39230220] [2021-11-07 07:56:14,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:56:14,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:14,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:14,358 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:14,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-11-07 07:56:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:18,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 1302 conjuncts, 119 conjunts are in the unsatisfiable core [2021-11-07 07:56:18,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:19,310 INFO L134 CoverageAnalysis]: Checked inductivity of 13225 backedges. 0 proven. 13225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:19,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39230220] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:19,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:19,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 121 [2021-11-07 07:56:19,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14941571] [2021-11-07 07:56:19,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2021-11-07 07:56:19,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:19,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-11-07 07:56:19,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7026, Invalid=7494, Unknown=0, NotChecked=0, Total=14520 [2021-11-07 07:56:19,313 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand has 121 states, 121 states have (on average 1.9917355371900827) internal successors, (241), 121 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:56:19,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:19,513 INFO L93 Difference]: Finished difference Result 244 states and 244 transitions. [2021-11-07 07:56:19,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-11-07 07:56:19,513 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.9917355371900827) internal successors, (241), 121 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 236 [2021-11-07 07:56:19,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:19,514 INFO L225 Difference]: With dead ends: 244 [2021-11-07 07:56:19,514 INFO L226 Difference]: Without dead ends: 240 [2021-11-07 07:56:19,515 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=7031, Invalid=7731, Unknown=0, NotChecked=0, Total=14762 [2021-11-07 07:56:19,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-11-07 07:56:19,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2021-11-07 07:56:19,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.004201680672269) internal successors, (239), 238 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:56:19,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2021-11-07 07:56:19,518 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 236 [2021-11-07 07:56:19,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:19,518 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2021-11-07 07:56:19,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.9917355371900827) internal successors, (241), 121 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:56:19,518 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2021-11-07 07:56:19,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-07 07:56:19,519 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:19,519 INFO L513 BasicCegarLoop]: trace histogram [116, 116, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:19,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-11-07 07:56:19,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:19,719 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:19,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:19,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1561125164, now seen corresponding path program 116 times [2021-11-07 07:56:19,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:19,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147140865] [2021-11-07 07:56:19,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:19,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:24,442 INFO L134 CoverageAnalysis]: Checked inductivity of 13456 backedges. 0 proven. 13456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:24,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:24,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147140865] [2021-11-07 07:56:24,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147140865] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:24,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988635578] [2021-11-07 07:56:24,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:56:24,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:24,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:24,443 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:24,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-11-07 07:56:28,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:56:28,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:28,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 1313 conjuncts, 120 conjunts are in the unsatisfiable core [2021-11-07 07:56:28,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:29,460 INFO L134 CoverageAnalysis]: Checked inductivity of 13456 backedges. 0 proven. 13456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:29,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988635578] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:29,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:29,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 122 [2021-11-07 07:56:29,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766884320] [2021-11-07 07:56:29,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2021-11-07 07:56:29,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:29,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-11-07 07:56:29,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7145, Invalid=7617, Unknown=0, NotChecked=0, Total=14762 [2021-11-07 07:56:29,463 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand has 122 states, 122 states have (on average 1.9918032786885247) internal successors, (243), 122 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:56:29,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:29,654 INFO L93 Difference]: Finished difference Result 246 states and 246 transitions. [2021-11-07 07:56:29,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-11-07 07:56:29,654 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.9918032786885247) internal successors, (243), 122 states have internal predecessors, (243), 0 states have call successors, (0), 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 238 [2021-11-07 07:56:29,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:29,655 INFO L225 Difference]: With dead ends: 246 [2021-11-07 07:56:29,655 INFO L226 Difference]: Without dead ends: 242 [2021-11-07 07:56:29,656 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=7150, Invalid=7856, Unknown=0, NotChecked=0, Total=15006 [2021-11-07 07:56:29,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-07 07:56:29,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 241. [2021-11-07 07:56:29,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.0041666666666667) internal successors, (241), 240 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:56:29,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 241 transitions. [2021-11-07 07:56:29,658 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 241 transitions. Word has length 238 [2021-11-07 07:56:29,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:29,658 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 241 transitions. [2021-11-07 07:56:29,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.9918032786885247) internal successors, (243), 122 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:56:29,659 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 241 transitions. [2021-11-07 07:56:29,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-07 07:56:29,659 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:29,659 INFO L513 BasicCegarLoop]: trace histogram [117, 117, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:29,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:29,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-11-07 07:56:29,860 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:29,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:29,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1244553223, now seen corresponding path program 117 times [2021-11-07 07:56:29,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:29,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328330416] [2021-11-07 07:56:29,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:29,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:30,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:34,575 INFO L134 CoverageAnalysis]: Checked inductivity of 13689 backedges. 0 proven. 13689 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:34,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:34,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328330416] [2021-11-07 07:56:34,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328330416] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:34,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075431172] [2021-11-07 07:56:34,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:56:34,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:34,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:34,576 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:34,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-11-07 07:56:39,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 118 check-sat command(s) [2021-11-07 07:56:39,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:39,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 121 conjunts are in the unsatisfiable core [2021-11-07 07:56:39,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 13689 backedges. 0 proven. 13689 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:39,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075431172] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:39,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:39,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 123 [2021-11-07 07:56:39,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825412484] [2021-11-07 07:56:39,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2021-11-07 07:56:39,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:39,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-11-07 07:56:39,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7265, Invalid=7741, Unknown=0, NotChecked=0, Total=15006 [2021-11-07 07:56:39,928 INFO L87 Difference]: Start difference. First operand 241 states and 241 transitions. Second operand has 123 states, 123 states have (on average 1.991869918699187) internal successors, (245), 123 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:56:40,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:40,105 INFO L93 Difference]: Finished difference Result 248 states and 248 transitions. [2021-11-07 07:56:40,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-11-07 07:56:40,106 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.991869918699187) internal successors, (245), 123 states have internal predecessors, (245), 0 states have call successors, (0), 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 240 [2021-11-07 07:56:40,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:40,107 INFO L225 Difference]: With dead ends: 248 [2021-11-07 07:56:40,107 INFO L226 Difference]: Without dead ends: 244 [2021-11-07 07:56:40,108 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=7270, Invalid=7982, Unknown=0, NotChecked=0, Total=15252 [2021-11-07 07:56:40,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-07 07:56:40,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2021-11-07 07:56:40,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.0041322314049588) internal successors, (243), 242 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:56:40,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2021-11-07 07:56:40,111 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 240 [2021-11-07 07:56:40,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:40,111 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2021-11-07 07:56:40,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.991869918699187) internal successors, (245), 123 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:56:40,111 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2021-11-07 07:56:40,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-11-07 07:56:40,112 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:40,112 INFO L513 BasicCegarLoop]: trace histogram [118, 118, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:40,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:40,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-11-07 07:56:40,313 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:40,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:40,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1961595938, now seen corresponding path program 118 times [2021-11-07 07:56:40,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:40,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692746809] [2021-11-07 07:56:40,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:40,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:45,151 INFO L134 CoverageAnalysis]: Checked inductivity of 13924 backedges. 0 proven. 13924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:45,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:45,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692746809] [2021-11-07 07:56:45,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692746809] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:45,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242504728] [2021-11-07 07:56:45,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:56:45,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:45,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:45,152 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:45,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-11-07 07:56:49,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:56:49,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:49,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 1335 conjuncts, 122 conjunts are in the unsatisfiable core [2021-11-07 07:56:49,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:50,322 INFO L134 CoverageAnalysis]: Checked inductivity of 13924 backedges. 0 proven. 13924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:50,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242504728] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:50,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:50,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122] total 124 [2021-11-07 07:56:50,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652614509] [2021-11-07 07:56:50,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2021-11-07 07:56:50,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:50,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2021-11-07 07:56:50,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7386, Invalid=7866, Unknown=0, NotChecked=0, Total=15252 [2021-11-07 07:56:50,325 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand has 124 states, 124 states have (on average 1.9919354838709677) internal successors, (247), 124 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:56:50,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:50,516 INFO L93 Difference]: Finished difference Result 250 states and 250 transitions. [2021-11-07 07:56:50,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-11-07 07:56:50,516 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.9919354838709677) internal successors, (247), 124 states have internal predecessors, (247), 0 states have call successors, (0), 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 242 [2021-11-07 07:56:50,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:50,517 INFO L225 Difference]: With dead ends: 250 [2021-11-07 07:56:50,517 INFO L226 Difference]: Without dead ends: 246 [2021-11-07 07:56:50,518 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=7391, Invalid=8109, Unknown=0, NotChecked=0, Total=15500 [2021-11-07 07:56:50,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-07 07:56:50,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2021-11-07 07:56:50,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.0040983606557377) internal successors, (245), 244 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:56:50,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 245 transitions. [2021-11-07 07:56:50,521 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 245 transitions. Word has length 242 [2021-11-07 07:56:50,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:50,521 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 245 transitions. [2021-11-07 07:56:50,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 1.9919354838709677) internal successors, (247), 124 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:56:50,521 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 245 transitions. [2021-11-07 07:56:50,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-07 07:56:50,522 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:50,522 INFO L513 BasicCegarLoop]: trace histogram [119, 119, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:50,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:50,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:50,723 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:50,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:50,723 INFO L85 PathProgramCache]: Analyzing trace with hash 450089603, now seen corresponding path program 119 times [2021-11-07 07:56:50,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:50,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281954835] [2021-11-07 07:56:50,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:50,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:50,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:55,608 INFO L134 CoverageAnalysis]: Checked inductivity of 14161 backedges. 0 proven. 14161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:55,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:55,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281954835] [2021-11-07 07:56:55,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281954835] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:55,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979492382] [2021-11-07 07:56:55,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:56:55,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:55,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:55,609 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:55,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-11-07 07:57:00,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 120 check-sat command(s) [2021-11-07 07:57:00,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:00,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 1346 conjuncts, 123 conjunts are in the unsatisfiable core [2021-11-07 07:57:00,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:00,995 INFO L134 CoverageAnalysis]: Checked inductivity of 14161 backedges. 0 proven. 14161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:00,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979492382] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:00,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:00,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 125 [2021-11-07 07:57:00,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379526717] [2021-11-07 07:57:00,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2021-11-07 07:57:00,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:00,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-11-07 07:57:00,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7508, Invalid=7992, Unknown=0, NotChecked=0, Total=15500 [2021-11-07 07:57:00,998 INFO L87 Difference]: Start difference. First operand 245 states and 245 transitions. Second operand has 125 states, 125 states have (on average 1.992) internal successors, (249), 125 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:57:01,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:01,182 INFO L93 Difference]: Finished difference Result 252 states and 252 transitions. [2021-11-07 07:57:01,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-11-07 07:57:01,182 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 1.992) internal successors, (249), 125 states have internal predecessors, (249), 0 states have call successors, (0), 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 244 [2021-11-07 07:57:01,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:01,183 INFO L225 Difference]: With dead ends: 252 [2021-11-07 07:57:01,183 INFO L226 Difference]: Without dead ends: 248 [2021-11-07 07:57:01,184 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=7513, Invalid=8237, Unknown=0, NotChecked=0, Total=15750 [2021-11-07 07:57:01,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-11-07 07:57:01,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2021-11-07 07:57:01,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.0040650406504066) internal successors, (247), 246 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:57:01,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2021-11-07 07:57:01,187 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 244 [2021-11-07 07:57:01,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:01,187 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2021-11-07 07:57:01,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 1.992) internal successors, (249), 125 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:57:01,187 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2021-11-07 07:57:01,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-07 07:57:01,188 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:01,188 INFO L513 BasicCegarLoop]: trace histogram [120, 120, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:01,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:01,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-11-07 07:57:01,389 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:01,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:01,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1202445336, now seen corresponding path program 120 times [2021-11-07 07:57:01,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:01,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386263763] [2021-11-07 07:57:01,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:01,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:01,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 14400 backedges. 0 proven. 14400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:06,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:06,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386263763] [2021-11-07 07:57:06,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386263763] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:06,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960498934] [2021-11-07 07:57:06,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:57:06,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:06,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:06,491 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:06,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-11-07 07:57:11,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 121 check-sat command(s) [2021-11-07 07:57:11,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:11,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 1357 conjuncts, 124 conjunts are in the unsatisfiable core [2021-11-07 07:57:11,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:12,029 INFO L134 CoverageAnalysis]: Checked inductivity of 14400 backedges. 0 proven. 14400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:12,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960498934] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:12,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:12,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 126 [2021-11-07 07:57:12,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138029492] [2021-11-07 07:57:12,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2021-11-07 07:57:12,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:12,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-11-07 07:57:12,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7631, Invalid=8119, Unknown=0, NotChecked=0, Total=15750 [2021-11-07 07:57:12,033 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand has 126 states, 126 states have (on average 1.992063492063492) internal successors, (251), 126 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:57:12,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:12,262 INFO L93 Difference]: Finished difference Result 254 states and 254 transitions. [2021-11-07 07:57:12,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-11-07 07:57:12,262 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.992063492063492) internal successors, (251), 126 states have internal predecessors, (251), 0 states have call successors, (0), 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 246 [2021-11-07 07:57:12,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:12,263 INFO L225 Difference]: With dead ends: 254 [2021-11-07 07:57:12,263 INFO L226 Difference]: Without dead ends: 250 [2021-11-07 07:57:12,264 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7636, Invalid=8366, Unknown=0, NotChecked=0, Total=16002 [2021-11-07 07:57:12,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-11-07 07:57:12,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2021-11-07 07:57:12,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.0040322580645162) internal successors, (249), 248 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:57:12,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 249 transitions. [2021-11-07 07:57:12,267 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 249 transitions. Word has length 246 [2021-11-07 07:57:12,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:12,267 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 249 transitions. [2021-11-07 07:57:12,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 1.992063492063492) internal successors, (251), 126 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:57:12,267 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 249 transitions. [2021-11-07 07:57:12,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-11-07 07:57:12,268 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:12,268 INFO L513 BasicCegarLoop]: trace histogram [121, 121, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:12,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-11-07 07:57:12,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:12,469 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:12,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:12,469 INFO L85 PathProgramCache]: Analyzing trace with hash -150622195, now seen corresponding path program 121 times [2021-11-07 07:57:12,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:12,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170014883] [2021-11-07 07:57:12,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:12,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:12,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:17,528 INFO L134 CoverageAnalysis]: Checked inductivity of 14641 backedges. 0 proven. 14641 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:17,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:17,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170014883] [2021-11-07 07:57:17,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170014883] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:17,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303201444] [2021-11-07 07:57:17,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:57:17,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:17,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:17,529 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:17,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-11-07 07:57:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:22,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 1368 conjuncts, 125 conjunts are in the unsatisfiable core [2021-11-07 07:57:22,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 14641 backedges. 0 proven. 14641 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:22,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303201444] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:22,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:22,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125] total 127 [2021-11-07 07:57:22,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276947856] [2021-11-07 07:57:22,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2021-11-07 07:57:22,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:22,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-11-07 07:57:22,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7755, Invalid=8247, Unknown=0, NotChecked=0, Total=16002 [2021-11-07 07:57:22,953 INFO L87 Difference]: Start difference. First operand 249 states and 249 transitions. Second operand has 127 states, 127 states have (on average 1.9921259842519685) internal successors, (253), 127 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 07:57:23,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:23,230 INFO L93 Difference]: Finished difference Result 256 states and 256 transitions. [2021-11-07 07:57:23,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-11-07 07:57:23,230 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.9921259842519685) internal successors, (253), 127 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 248 [2021-11-07 07:57:23,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:23,230 INFO L225 Difference]: With dead ends: 256 [2021-11-07 07:57:23,231 INFO L226 Difference]: Without dead ends: 252 [2021-11-07 07:57:23,232 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7760, Invalid=8496, Unknown=0, NotChecked=0, Total=16256 [2021-11-07 07:57:23,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-07 07:57:23,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 251. [2021-11-07 07:57:23,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.004) internal successors, (251), 250 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:57:23,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2021-11-07 07:57:23,236 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 248 [2021-11-07 07:57:23,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:23,236 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2021-11-07 07:57:23,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.9921259842519685) internal successors, (253), 127 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 07:57:23,237 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2021-11-07 07:57:23,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-07 07:57:23,238 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:23,238 INFO L513 BasicCegarLoop]: trace histogram [122, 122, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:23,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:23,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-11-07 07:57:23,445 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:23,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:23,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1334101746, now seen corresponding path program 122 times [2021-11-07 07:57:23,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:23,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69473334] [2021-11-07 07:57:23,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:23,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:28,541 INFO L134 CoverageAnalysis]: Checked inductivity of 14884 backedges. 0 proven. 14884 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:28,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:28,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69473334] [2021-11-07 07:57:28,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69473334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:28,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712490043] [2021-11-07 07:57:28,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:57:28,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:28,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:28,542 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:28,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-11-07 07:57:33,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:57:33,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:33,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 126 conjunts are in the unsatisfiable core [2021-11-07 07:57:33,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:34,021 INFO L134 CoverageAnalysis]: Checked inductivity of 14884 backedges. 0 proven. 14884 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:34,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712490043] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:34,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:34,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126] total 128 [2021-11-07 07:57:34,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377327794] [2021-11-07 07:57:34,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2021-11-07 07:57:34,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:34,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-11-07 07:57:34,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7880, Invalid=8376, Unknown=0, NotChecked=0, Total=16256 [2021-11-07 07:57:34,025 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand has 128 states, 128 states have (on average 1.9921875) internal successors, (255), 128 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:57:34,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:34,231 INFO L93 Difference]: Finished difference Result 258 states and 258 transitions. [2021-11-07 07:57:34,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-11-07 07:57:34,232 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.9921875) internal successors, (255), 128 states have internal predecessors, (255), 0 states have call successors, (0), 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 250 [2021-11-07 07:57:34,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:34,232 INFO L225 Difference]: With dead ends: 258 [2021-11-07 07:57:34,232 INFO L226 Difference]: Without dead ends: 254 [2021-11-07 07:57:34,233 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=7885, Invalid=8627, Unknown=0, NotChecked=0, Total=16512 [2021-11-07 07:57:34,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-07 07:57:34,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 253. [2021-11-07 07:57:34,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.003968253968254) internal successors, (253), 252 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 07:57:34,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 253 transitions. [2021-11-07 07:57:34,236 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 253 transitions. Word has length 250 [2021-11-07 07:57:34,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:34,236 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 253 transitions. [2021-11-07 07:57:34,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.9921875) internal successors, (255), 128 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:57:34,237 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 253 transitions. [2021-11-07 07:57:34,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-07 07:57:34,237 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:34,237 INFO L513 BasicCegarLoop]: trace histogram [123, 123, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:34,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2021-11-07 07:57:34,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-11-07 07:57:34,438 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:34,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:34,438 INFO L85 PathProgramCache]: Analyzing trace with hash -2070300521, now seen corresponding path program 123 times [2021-11-07 07:57:34,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:34,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404686660] [2021-11-07 07:57:34,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:34,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:34,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:39,647 INFO L134 CoverageAnalysis]: Checked inductivity of 15129 backedges. 0 proven. 15129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:39,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:39,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404686660] [2021-11-07 07:57:39,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404686660] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:39,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680312125] [2021-11-07 07:57:39,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:57:39,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:39,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:39,649 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:39,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-11-07 07:57:44,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 124 check-sat command(s) [2021-11-07 07:57:44,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:44,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 1390 conjuncts, 127 conjunts are in the unsatisfiable core [2021-11-07 07:57:44,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:45,561 INFO L134 CoverageAnalysis]: Checked inductivity of 15129 backedges. 0 proven. 15129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:45,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680312125] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:45,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:45,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127] total 129 [2021-11-07 07:57:45,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060889192] [2021-11-07 07:57:45,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2021-11-07 07:57:45,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:45,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2021-11-07 07:57:45,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8006, Invalid=8506, Unknown=0, NotChecked=0, Total=16512 [2021-11-07 07:57:45,564 INFO L87 Difference]: Start difference. First operand 253 states and 253 transitions. Second operand has 129 states, 129 states have (on average 1.9922480620155039) internal successors, (257), 129 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:57:45,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:45,750 INFO L93 Difference]: Finished difference Result 260 states and 260 transitions. [2021-11-07 07:57:45,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-11-07 07:57:45,751 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.9922480620155039) internal successors, (257), 129 states have internal predecessors, (257), 0 states have call successors, (0), 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 07:57:45,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:45,752 INFO L225 Difference]: With dead ends: 260 [2021-11-07 07:57:45,752 INFO L226 Difference]: Without dead ends: 256 [2021-11-07 07:57:45,752 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=8011, Invalid=8759, Unknown=0, NotChecked=0, Total=16770 [2021-11-07 07:57:45,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-07 07:57:45,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 255. [2021-11-07 07:57:45,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.0039370078740157) internal successors, (255), 254 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:57:45,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 255 transitions. [2021-11-07 07:57:45,755 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 255 transitions. Word has length 252 [2021-11-07 07:57:45,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:45,755 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 255 transitions. [2021-11-07 07:57:45,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.9922480620155039) internal successors, (257), 129 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:57:45,756 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 255 transitions. [2021-11-07 07:57:45,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-11-07 07:57:45,756 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:45,757 INFO L513 BasicCegarLoop]: trace histogram [124, 124, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:45,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:45,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:45,961 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:45,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:45,961 INFO L85 PathProgramCache]: Analyzing trace with hash -935799556, now seen corresponding path program 124 times [2021-11-07 07:57:45,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:45,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381278784] [2021-11-07 07:57:45,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:45,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:51,233 INFO L134 CoverageAnalysis]: Checked inductivity of 15376 backedges. 0 proven. 15376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:51,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:51,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381278784] [2021-11-07 07:57:51,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381278784] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:51,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945232406] [2021-11-07 07:57:51,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:57:51,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:51,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:51,234 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:51,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-11-07 07:57:56,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:57:56,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:56,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 1401 conjuncts, 128 conjunts are in the unsatisfiable core [2021-11-07 07:57:56,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:56,887 INFO L134 CoverageAnalysis]: Checked inductivity of 15376 backedges. 0 proven. 15376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:56,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945232406] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:56,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:56,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128] total 130 [2021-11-07 07:57:56,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105206671] [2021-11-07 07:57:56,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2021-11-07 07:57:56,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:56,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-11-07 07:57:56,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8133, Invalid=8637, Unknown=0, NotChecked=0, Total=16770 [2021-11-07 07:57:56,890 INFO L87 Difference]: Start difference. First operand 255 states and 255 transitions. Second operand has 130 states, 130 states have (on average 1.9923076923076923) internal successors, (259), 130 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:57:57,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:57,092 INFO L93 Difference]: Finished difference Result 262 states and 262 transitions. [2021-11-07 07:57:57,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-11-07 07:57:57,093 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 1.9923076923076923) internal successors, (259), 130 states have internal predecessors, (259), 0 states have call successors, (0), 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 254 [2021-11-07 07:57:57,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:57,093 INFO L225 Difference]: With dead ends: 262 [2021-11-07 07:57:57,093 INFO L226 Difference]: Without dead ends: 258 [2021-11-07 07:57:57,095 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=8138, Invalid=8892, Unknown=0, NotChecked=0, Total=17030 [2021-11-07 07:57:57,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-11-07 07:57:57,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2021-11-07 07:57:57,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.00390625) internal successors, (257), 256 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:57:57,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2021-11-07 07:57:57,098 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 254 [2021-11-07 07:57:57,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:57,098 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2021-11-07 07:57:57,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1.9923076923076923) internal successors, (259), 130 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:57:57,098 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2021-11-07 07:57:57,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-07 07:57:57,099 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:57,099 INFO L513 BasicCegarLoop]: trace histogram [125, 125, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:57,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-11-07 07:57:57,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-11-07 07:57:57,299 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:57,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:57,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1602065375, now seen corresponding path program 125 times [2021-11-07 07:57:57,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:57,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225880756] [2021-11-07 07:57:57,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:57,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:57,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:02,711 INFO L134 CoverageAnalysis]: Checked inductivity of 15625 backedges. 0 proven. 15625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:02,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:58:02,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225880756] [2021-11-07 07:58:02,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225880756] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:02,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698230966] [2021-11-07 07:58:02,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:58:02,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:02,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:58:02,713 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:58:02,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-11-07 07:58:07,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 126 check-sat command(s) [2021-11-07 07:58:07,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:58:07,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 1412 conjuncts, 129 conjunts are in the unsatisfiable core [2021-11-07 07:58:07,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:08,631 INFO L134 CoverageAnalysis]: Checked inductivity of 15625 backedges. 0 proven. 15625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:08,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698230966] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:08,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:58:08,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129] total 131 [2021-11-07 07:58:08,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904200831] [2021-11-07 07:58:08,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-11-07 07:58:08,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:58:08,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-11-07 07:58:08,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8261, Invalid=8769, Unknown=0, NotChecked=0, Total=17030 [2021-11-07 07:58:08,635 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand has 131 states, 131 states have (on average 1.9923664122137406) internal successors, (261), 131 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:58:08,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:58:08,856 INFO L93 Difference]: Finished difference Result 264 states and 264 transitions. [2021-11-07 07:58:08,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-11-07 07:58:08,857 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.9923664122137406) internal successors, (261), 131 states have internal predecessors, (261), 0 states have call successors, (0), 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 256 [2021-11-07 07:58:08,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:58:08,857 INFO L225 Difference]: With dead ends: 264 [2021-11-07 07:58:08,857 INFO L226 Difference]: Without dead ends: 260 [2021-11-07 07:58:08,859 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=8266, Invalid=9026, Unknown=0, NotChecked=0, Total=17292 [2021-11-07 07:58:08,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-07 07:58:08,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2021-11-07 07:58:08,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.003875968992248) internal successors, (259), 258 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:58:08,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2021-11-07 07:58:08,862 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 256 [2021-11-07 07:58:08,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:58:08,862 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2021-11-07 07:58:08,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.9923664122137406) internal successors, (261), 131 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:58:08,862 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2021-11-07 07:58:08,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-07 07:58:08,863 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:08,863 INFO L513 BasicCegarLoop]: trace histogram [126, 126, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:08,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2021-11-07 07:58:09,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-11-07 07:58:09,065 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:58:09,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:58:09,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1933390330, now seen corresponding path program 126 times [2021-11-07 07:58:09,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:58:09,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494382042] [2021-11-07 07:58:09,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:58:09,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:58:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:14,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:58:14,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494382042] [2021-11-07 07:58:14,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494382042] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:14,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126603461] [2021-11-07 07:58:14,514 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:58:14,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:14,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:58:14,515 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:58:14,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-11-07 07:58:19,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 127 check-sat command(s) [2021-11-07 07:58:19,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:58:19,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 1423 conjuncts, 130 conjunts are in the unsatisfiable core [2021-11-07 07:58:19,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:20,602 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:20,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126603461] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:20,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:58:20,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130] total 132 [2021-11-07 07:58:20,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630150504] [2021-11-07 07:58:20,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2021-11-07 07:58:20,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:58:20,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-11-07 07:58:20,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8390, Invalid=8902, Unknown=0, NotChecked=0, Total=17292 [2021-11-07 07:58:20,681 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand has 132 states, 132 states have (on average 1.9924242424242424) internal successors, (263), 132 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:58:20,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:58:20,904 INFO L93 Difference]: Finished difference Result 266 states and 266 transitions. [2021-11-07 07:58:20,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-11-07 07:58:20,905 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.9924242424242424) internal successors, (263), 132 states have internal predecessors, (263), 0 states have call successors, (0), 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 258 [2021-11-07 07:58:20,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:58:20,906 INFO L225 Difference]: With dead ends: 266 [2021-11-07 07:58:20,906 INFO L226 Difference]: Without dead ends: 262 [2021-11-07 07:58:20,907 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=8395, Invalid=9161, Unknown=0, NotChecked=0, Total=17556 [2021-11-07 07:58:20,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-07 07:58:20,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 261. [2021-11-07 07:58:20,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.0038461538461538) internal successors, (261), 260 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:58:20,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 261 transitions. [2021-11-07 07:58:20,911 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 261 transitions. Word has length 258 [2021-11-07 07:58:20,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:58:20,911 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 261 transitions. [2021-11-07 07:58:20,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 1.9924242424242424) internal successors, (263), 132 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:58:20,912 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 261 transitions. [2021-11-07 07:58:20,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-11-07 07:58:20,913 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:20,913 INFO L513 BasicCegarLoop]: trace histogram [127, 127, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:20,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2021-11-07 07:58:21,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-11-07 07:58:21,118 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:58:21,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:58:21,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1785875115, now seen corresponding path program 127 times [2021-11-07 07:58:21,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:58:21,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746369640] [2021-11-07 07:58:21,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:58:21,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:58:21,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:26,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16129 backedges. 0 proven. 16129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:26,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:58:26,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746369640] [2021-11-07 07:58:26,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746369640] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:26,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279776751] [2021-11-07 07:58:26,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:58:26,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:26,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:58:26,672 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:58:26,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-11-07 07:58:31,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:31,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 1434 conjuncts, 131 conjunts are in the unsatisfiable core [2021-11-07 07:58:31,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:32,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16129 backedges. 0 proven. 16129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:32,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279776751] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:32,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:58:32,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131] total 133 [2021-11-07 07:58:32,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419166633] [2021-11-07 07:58:32,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2021-11-07 07:58:32,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:58:32,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2021-11-07 07:58:32,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8520, Invalid=9036, Unknown=0, NotChecked=0, Total=17556 [2021-11-07 07:58:32,647 INFO L87 Difference]: Start difference. First operand 261 states and 261 transitions. Second operand has 133 states, 133 states have (on average 1.9924812030075187) internal successors, (265), 133 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:58:32,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:58:32,885 INFO L93 Difference]: Finished difference Result 268 states and 268 transitions. [2021-11-07 07:58:32,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-11-07 07:58:32,885 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 1.9924812030075187) internal successors, (265), 133 states have internal predecessors, (265), 0 states have call successors, (0), 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 260 [2021-11-07 07:58:32,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:58:32,886 INFO L225 Difference]: With dead ends: 268 [2021-11-07 07:58:32,886 INFO L226 Difference]: Without dead ends: 264 [2021-11-07 07:58:32,888 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=8525, Invalid=9297, Unknown=0, NotChecked=0, Total=17822 [2021-11-07 07:58:32,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-11-07 07:58:32,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 263. [2021-11-07 07:58:32,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.0038167938931297) internal successors, (263), 262 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:58:32,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2021-11-07 07:58:32,891 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 260 [2021-11-07 07:58:32,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:58:32,891 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2021-11-07 07:58:32,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 1.9924812030075187) internal successors, (265), 133 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:58:32,892 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2021-11-07 07:58:32,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-07 07:58:32,892 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:32,892 INFO L513 BasicCegarLoop]: trace histogram [128, 128, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:32,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-11-07 07:58:33,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:33,097 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:58:33,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:58:33,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1707789808, now seen corresponding path program 128 times [2021-11-07 07:58:33,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:58:33,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74709412] [2021-11-07 07:58:33,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:58:33,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:58:33,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:38,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 0 proven. 16384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:38,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:58:38,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74709412] [2021-11-07 07:58:38,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74709412] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:38,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550269826] [2021-11-07 07:58:38,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:58:38,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:38,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:58:38,818 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:58:38,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-11-07 07:58:44,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:58:44,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:58:44,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 1445 conjuncts, 132 conjunts are in the unsatisfiable core [2021-11-07 07:58:44,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:44,843 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 0 proven. 16384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:44,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550269826] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:44,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:58:44,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 132] total 134 [2021-11-07 07:58:44,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10773331] [2021-11-07 07:58:44,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2021-11-07 07:58:44,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:58:44,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2021-11-07 07:58:44,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8651, Invalid=9171, Unknown=0, NotChecked=0, Total=17822 [2021-11-07 07:58:44,847 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand has 134 states, 134 states have (on average 1.992537313432836) internal successors, (267), 134 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:58:45,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:58:45,088 INFO L93 Difference]: Finished difference Result 270 states and 270 transitions. [2021-11-07 07:58:45,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-11-07 07:58:45,088 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.992537313432836) internal successors, (267), 134 states have internal predecessors, (267), 0 states have call successors, (0), 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 262 [2021-11-07 07:58:45,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:58:45,089 INFO L225 Difference]: With dead ends: 270 [2021-11-07 07:58:45,089 INFO L226 Difference]: Without dead ends: 266 [2021-11-07 07:58:45,090 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8656, Invalid=9434, Unknown=0, NotChecked=0, Total=18090 [2021-11-07 07:58:45,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-07 07:58:45,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2021-11-07 07:58:45,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.003787878787879) internal successors, (265), 264 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:58:45,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 265 transitions. [2021-11-07 07:58:45,093 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 265 transitions. Word has length 262 [2021-11-07 07:58:45,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:58:45,093 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 265 transitions. [2021-11-07 07:58:45,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.992537313432836) internal successors, (267), 134 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:58:45,093 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 265 transitions. [2021-11-07 07:58:45,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-11-07 07:58:45,094 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:45,094 INFO L513 BasicCegarLoop]: trace histogram [129, 129, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:45,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-11-07 07:58:45,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-11-07 07:58:45,295 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:58:45,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:58:45,295 INFO L85 PathProgramCache]: Analyzing trace with hash -455355339, now seen corresponding path program 129 times [2021-11-07 07:58:45,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:58:45,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442904846] [2021-11-07 07:58:45,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:58:45,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:58:45,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:51,021 INFO L134 CoverageAnalysis]: Checked inductivity of 16641 backedges. 0 proven. 16641 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:51,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:58:51,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442904846] [2021-11-07 07:58:51,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442904846] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:51,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063186897] [2021-11-07 07:58:51,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:58:51,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:51,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:58:51,026 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:58:51,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-11-07 07:58:56,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 130 check-sat command(s) [2021-11-07 07:58:56,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:58:56,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 1456 conjuncts, 133 conjunts are in the unsatisfiable core [2021-11-07 07:58:56,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16641 backedges. 0 proven. 16641 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:57,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063186897] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:57,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:58:57,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133] total 135 [2021-11-07 07:58:57,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28243686] [2021-11-07 07:58:57,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2021-11-07 07:58:57,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:58:57,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2021-11-07 07:58:57,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8783, Invalid=9307, Unknown=0, NotChecked=0, Total=18090 [2021-11-07 07:58:57,548 INFO L87 Difference]: Start difference. First operand 265 states and 265 transitions. Second operand has 135 states, 135 states have (on average 1.9925925925925927) internal successors, (269), 135 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:58:57,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:58:57,766 INFO L93 Difference]: Finished difference Result 272 states and 272 transitions. [2021-11-07 07:58:57,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-11-07 07:58:57,776 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.9925925925925927) internal successors, (269), 135 states have internal predecessors, (269), 0 states have call successors, (0), 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 264 [2021-11-07 07:58:57,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:58:57,777 INFO L225 Difference]: With dead ends: 272 [2021-11-07 07:58:57,777 INFO L226 Difference]: Without dead ends: 268 [2021-11-07 07:58:57,780 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8788, Invalid=9572, Unknown=0, NotChecked=0, Total=18360 [2021-11-07 07:58:57,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-07 07:58:57,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 267. [2021-11-07 07:58:57,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.0037593984962405) internal successors, (267), 266 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:58:57,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 267 transitions. [2021-11-07 07:58:57,784 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 267 transitions. Word has length 264 [2021-11-07 07:58:57,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:58:57,785 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 267 transitions. [2021-11-07 07:58:57,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.9925925925925927) internal successors, (269), 135 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:58:57,785 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 267 transitions. [2021-11-07 07:58:57,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-11-07 07:58:57,786 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:57,787 INFO L513 BasicCegarLoop]: trace histogram [130, 130, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:57,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2021-11-07 07:58:58,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:58,001 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:58:58,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:58:58,001 INFO L85 PathProgramCache]: Analyzing trace with hash 543326490, now seen corresponding path program 130 times [2021-11-07 07:58:58,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:58:58,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878472838] [2021-11-07 07:58:58,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:58:58,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:58:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:03,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16900 backedges. 0 proven. 16900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:03,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:59:03,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878472838] [2021-11-07 07:59:03,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878472838] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:03,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382003813] [2021-11-07 07:59:03,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:59:03,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:03,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:59:03,802 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:59:03,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-11-07 07:59:09,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:59:09,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:59:09,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 1467 conjuncts, 134 conjunts are in the unsatisfiable core [2021-11-07 07:59:09,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:59:10,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16900 backedges. 0 proven. 16900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:10,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382003813] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:10,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:59:10,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134] total 136 [2021-11-07 07:59:10,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960601182] [2021-11-07 07:59:10,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2021-11-07 07:59:10,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:59:10,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-11-07 07:59:10,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8916, Invalid=9444, Unknown=0, NotChecked=0, Total=18360 [2021-11-07 07:59:10,066 INFO L87 Difference]: Start difference. First operand 267 states and 267 transitions. Second operand has 136 states, 136 states have (on average 1.9926470588235294) internal successors, (271), 136 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:59:10,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:10,357 INFO L93 Difference]: Finished difference Result 274 states and 274 transitions. [2021-11-07 07:59:10,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-11-07 07:59:10,357 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 1.9926470588235294) internal successors, (271), 136 states have internal predecessors, (271), 0 states have call successors, (0), 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 266 [2021-11-07 07:59:10,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:10,358 INFO L225 Difference]: With dead ends: 274 [2021-11-07 07:59:10,358 INFO L226 Difference]: Without dead ends: 270 [2021-11-07 07:59:10,360 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=8921, Invalid=9711, Unknown=0, NotChecked=0, Total=18632 [2021-11-07 07:59:10,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-07 07:59:10,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 269. [2021-11-07 07:59:10,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.0037313432835822) internal successors, (269), 268 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:59:10,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 269 transitions. [2021-11-07 07:59:10,363 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 269 transitions. Word has length 266 [2021-11-07 07:59:10,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:10,363 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 269 transitions. [2021-11-07 07:59:10,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 1.9926470588235294) internal successors, (271), 136 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:59:10,363 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 269 transitions. [2021-11-07 07:59:10,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-11-07 07:59:10,364 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:10,364 INFO L513 BasicCegarLoop]: trace histogram [131, 131, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:10,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2021-11-07 07:59:10,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:10,564 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:59:10,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:10,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1796110145, now seen corresponding path program 131 times [2021-11-07 07:59:10,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:59:10,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386877532] [2021-11-07 07:59:10,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:10,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:59:10,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:16,574 INFO L134 CoverageAnalysis]: Checked inductivity of 17161 backedges. 0 proven. 17161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:16,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:59:16,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386877532] [2021-11-07 07:59:16,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386877532] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:16,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693912628] [2021-11-07 07:59:16,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:59:16,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:16,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:59:16,575 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:59:16,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d89de33-996c-4125-95a8-ddb5aace5515/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process