./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label56.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label56.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX --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 6817325bf2ee6430e3e6b828534a0d98b8fcced6b8f752a4847958e1d99aaba4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:44:56,006 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:44:56,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:44:56,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:44:56,048 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:44:56,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:44:56,052 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:44:56,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:44:56,058 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:44:56,060 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:44:56,062 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:44:56,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:44:56,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:44:56,067 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:44:56,069 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:44:56,071 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:44:56,073 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:44:56,074 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:44:56,077 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:44:56,081 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:44:56,083 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:44:56,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:44:56,094 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:44:56,095 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:44:56,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:44:56,100 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:44:56,101 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:44:56,102 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:44:56,103 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:44:56,112 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:44:56,112 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:44:56,113 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:44:56,117 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:44:56,118 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:44:56,120 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:44:56,120 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:44:56,121 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:44:56,122 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:44:56,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:44:56,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:44:56,124 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:44:56,125 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:44:56,176 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:44:56,177 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:44:56,178 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:44:56,178 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:44:56,185 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:44:56,185 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:44:56,185 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:44:56,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:44:56,186 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:44:56,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:44:56,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:44:56,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:44:56,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:44:56,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:44:56,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:44:56,188 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:44:56,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:44:56,188 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:44:56,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:44:56,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:44:56,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:44:56,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:44:56,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:44:56,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:44:56,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:44:56,191 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:44:56,191 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:44:56,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:44:56,192 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:44:56,192 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:44:56,192 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:44:56,192 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:44:56,193 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_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6817325bf2ee6430e3e6b828534a0d98b8fcced6b8f752a4847958e1d99aaba4 [2021-11-09 08:44:56,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:44:56,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:44:56,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:44:56,559 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:44:56,560 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:44:56,562 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/eca-rers2012/Problem17_label56.c [2021-11-09 08:44:56,655 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/data/5a5f4212b/c8903dd9524041d89a2c1789bfcaea5f/FLAG87e810d51 [2021-11-09 08:44:57,713 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:44:57,715 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/sv-benchmarks/c/eca-rers2012/Problem17_label56.c [2021-11-09 08:44:57,758 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/data/5a5f4212b/c8903dd9524041d89a2c1789bfcaea5f/FLAG87e810d51 [2021-11-09 08:44:58,122 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/data/5a5f4212b/c8903dd9524041d89a2c1789bfcaea5f [2021-11-09 08:44:58,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:44:58,127 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:44:58,138 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:44:58,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:44:58,142 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:44:58,142 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:44:58" (1/1) ... [2021-11-09 08:44:58,144 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@758c601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:44:58, skipping insertion in model container [2021-11-09 08:44:58,144 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:44:58" (1/1) ... [2021-11-09 08:44:58,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:44:58,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:44:58,783 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_76569bbe-da15-49c6-bd2c-3198bb3f80cb/sv-benchmarks/c/eca-rers2012/Problem17_label56.c[9824,9837] [2021-11-09 08:44:59,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:44:59,668 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:44:59,710 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_76569bbe-da15-49c6-bd2c-3198bb3f80cb/sv-benchmarks/c/eca-rers2012/Problem17_label56.c[9824,9837] [2021-11-09 08:45:00,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:45:00,176 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:45:00,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:45:00 WrapperNode [2021-11-09 08:45:00,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:45:00,179 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:45:00,180 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:45:00,180 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:45:00,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:45:00" (1/1) ... [2021-11-09 08:45:00,271 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:45:00" (1/1) ... [2021-11-09 08:45:00,731 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:45:00,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:45:00,733 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:45:00,733 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:45:00,746 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:45:00" (1/1) ... [2021-11-09 08:45:00,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:45:00" (1/1) ... [2021-11-09 08:45:00,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:45:00" (1/1) ... [2021-11-09 08:45:00,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:45:00" (1/1) ... [2021-11-09 08:45:01,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:45:00" (1/1) ... [2021-11-09 08:45:01,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:45:00" (1/1) ... [2021-11-09 08:45:01,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:45:00" (1/1) ... [2021-11-09 08:45:01,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:45:01,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:45:01,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:45:01,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:45:01,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:45:00" (1/1) ... [2021-11-09 08:45:01,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:45:01,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:45:01,192 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:45:01,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:45:01,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:45:01,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:45:01,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:45:01,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:45:06,529 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:45:06,530 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-09 08:45:06,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:45:06 BoogieIcfgContainer [2021-11-09 08:45:06,536 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:45:06,541 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:45:06,542 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:45:06,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:45:06,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:44:58" (1/3) ... [2021-11-09 08:45:06,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d66e470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:45:06, skipping insertion in model container [2021-11-09 08:45:06,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:45:00" (2/3) ... [2021-11-09 08:45:06,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d66e470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:45:06, skipping insertion in model container [2021-11-09 08:45:06,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:45:06" (3/3) ... [2021-11-09 08:45:06,551 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label56.c [2021-11-09 08:45:06,559 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:45:06,559 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 08:45:06,640 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:45:06,649 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 [2021-11-09 08:45:06,649 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 08:45:06,689 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:06,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-09 08:45:06,700 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:45:06,701 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:45:06,702 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:45:06,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:45:06,713 INFO L85 PathProgramCache]: Analyzing trace with hash -215114758, now seen corresponding path program 1 times [2021-11-09 08:45:06,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:45:06,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089410420] [2021-11-09 08:45:06,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:45:06,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:45:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:07,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:45:07,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:45:07,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089410420] [2021-11-09 08:45:07,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089410420] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:45:07,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:45:07,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:45:07,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646264532] [2021-11-09 08:45:07,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:45:07,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:45:07,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:45:07,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:45:07,172 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:11,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:45:11,451 INFO L93 Difference]: Finished difference Result 1644 states and 3029 transitions. [2021-11-09 08:45:11,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:45:11,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-09 08:45:11,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:45:11,494 INFO L225 Difference]: With dead ends: 1644 [2021-11-09 08:45:11,499 INFO L226 Difference]: Without dead ends: 977 [2021-11-09 08:45:11,512 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:45:11,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-11-09 08:45:11,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 971. [2021-11-09 08:45:11,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.5536082474226804) internal successors, (1507), 970 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:11,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1507 transitions. [2021-11-09 08:45:11,658 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1507 transitions. Word has length 66 [2021-11-09 08:45:11,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:45:11,659 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 1507 transitions. [2021-11-09 08:45:11,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:11,660 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1507 transitions. [2021-11-09 08:45:11,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-09 08:45:11,668 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:45:11,668 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:45:11,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:45:11,669 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:45:11,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:45:11,670 INFO L85 PathProgramCache]: Analyzing trace with hash -181115598, now seen corresponding path program 1 times [2021-11-09 08:45:11,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:45:11,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850043531] [2021-11-09 08:45:11,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:45:11,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:45:11,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:45:11,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:45:11,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850043531] [2021-11-09 08:45:11,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850043531] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:45:11,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:45:11,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:45:11,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414332313] [2021-11-09 08:45:11,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:45:11,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:45:11,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:45:11,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:45:11,893 INFO L87 Difference]: Start difference. First operand 971 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 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) [2021-11-09 08:45:16,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:45:16,031 INFO L93 Difference]: Finished difference Result 2815 states and 4382 transitions. [2021-11-09 08:45:16,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:45:16,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 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 133 [2021-11-09 08:45:16,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:45:16,047 INFO L225 Difference]: With dead ends: 2815 [2021-11-09 08:45:16,048 INFO L226 Difference]: Without dead ends: 1846 [2021-11-09 08:45:16,050 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:45:16,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2021-11-09 08:45:16,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1841. [2021-11-09 08:45:16,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.3505434782608696) internal successors, (2485), 1840 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:16,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2485 transitions. [2021-11-09 08:45:16,118 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2485 transitions. Word has length 133 [2021-11-09 08:45:16,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:45:16,119 INFO L470 AbstractCegarLoop]: Abstraction has 1841 states and 2485 transitions. [2021-11-09 08:45:16,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 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) [2021-11-09 08:45:16,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2485 transitions. [2021-11-09 08:45:16,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-09 08:45:16,127 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:45:16,128 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:45:16,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 08:45:16,129 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:45:16,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:45:16,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1697817478, now seen corresponding path program 1 times [2021-11-09 08:45:16,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:45:16,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138610510] [2021-11-09 08:45:16,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:45:16,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:45:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:45:16,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:45:16,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138610510] [2021-11-09 08:45:16,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138610510] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:45:16,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:45:16,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:45:16,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518318863] [2021-11-09 08:45:16,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:45:16,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:45:16,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:45:16,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:45:16,347 INFO L87 Difference]: Start difference. First operand 1841 states and 2485 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:20,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:45:20,041 INFO L93 Difference]: Finished difference Result 4552 states and 6285 transitions. [2021-11-09 08:45:20,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:45:20,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 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 [2021-11-09 08:45:20,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:45:20,062 INFO L225 Difference]: With dead ends: 4552 [2021-11-09 08:45:20,062 INFO L226 Difference]: Without dead ends: 2713 [2021-11-09 08:45:20,066 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 [2021-11-09 08:45:20,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-11-09 08:45:20,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2711. [2021-11-09 08:45:20,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2710 states have (on average 1.3007380073800738) internal successors, (3525), 2710 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:20,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 3525 transitions. [2021-11-09 08:45:20,159 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 3525 transitions. Word has length 136 [2021-11-09 08:45:20,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:45:20,161 INFO L470 AbstractCegarLoop]: Abstraction has 2711 states and 3525 transitions. [2021-11-09 08:45:20,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:20,162 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 3525 transitions. [2021-11-09 08:45:20,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-09 08:45:20,176 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:45:20,176 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:45:20,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 08:45:20,177 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:45:20,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:45:20,181 INFO L85 PathProgramCache]: Analyzing trace with hash 2021649633, now seen corresponding path program 1 times [2021-11-09 08:45:20,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:45:20,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15971141] [2021-11-09 08:45:20,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:45:20,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:45:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:20,459 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-09 08:45:20,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:45:20,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15971141] [2021-11-09 08:45:20,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15971141] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:45:20,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:45:20,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:45:20,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560275221] [2021-11-09 08:45:20,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:45:20,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:45:20,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:45:20,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:45:20,473 INFO L87 Difference]: Start difference. First operand 2711 states and 3525 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:23,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:45:23,844 INFO L93 Difference]: Finished difference Result 7984 states and 10364 transitions. [2021-11-09 08:45:23,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:45:23,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 0 states have call successors, (0), 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 205 [2021-11-09 08:45:23,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:45:23,888 INFO L225 Difference]: With dead ends: 7984 [2021-11-09 08:45:23,888 INFO L226 Difference]: Without dead ends: 4421 [2021-11-09 08:45:23,895 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:45:23,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4421 states. [2021-11-09 08:45:23,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4421 to 3566. [2021-11-09 08:45:24,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3566 states, 3565 states have (on average 1.1778401122019635) internal successors, (4199), 3565 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:24,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3566 states to 3566 states and 4199 transitions. [2021-11-09 08:45:24,017 INFO L78 Accepts]: Start accepts. Automaton has 3566 states and 4199 transitions. Word has length 205 [2021-11-09 08:45:24,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:45:24,017 INFO L470 AbstractCegarLoop]: Abstraction has 3566 states and 4199 transitions. [2021-11-09 08:45:24,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:24,018 INFO L276 IsEmpty]: Start isEmpty. Operand 3566 states and 4199 transitions. [2021-11-09 08:45:24,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-09 08:45:24,022 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:45:24,023 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:45:24,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 08:45:24,024 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:45:24,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:45:24,025 INFO L85 PathProgramCache]: Analyzing trace with hash 546947933, now seen corresponding path program 1 times [2021-11-09 08:45:24,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:45:24,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310776641] [2021-11-09 08:45:24,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:45:24,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:45:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:24,228 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:45:24,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:45:24,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310776641] [2021-11-09 08:45:24,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310776641] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:45:24,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:45:24,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:45:24,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996386985] [2021-11-09 08:45:24,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:45:24,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:45:24,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:45:24,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:45:24,233 INFO L87 Difference]: Start difference. First operand 3566 states and 4199 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:27,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:45:27,028 INFO L93 Difference]: Finished difference Result 9263 states and 11078 transitions. [2021-11-09 08:45:27,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:45:27,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2021-11-09 08:45:27,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:45:27,069 INFO L225 Difference]: With dead ends: 9263 [2021-11-09 08:45:27,070 INFO L226 Difference]: Without dead ends: 5699 [2021-11-09 08:45:27,076 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 [2021-11-09 08:45:27,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5699 states. [2021-11-09 08:45:27,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5699 to 5699. [2021-11-09 08:45:27,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5699 states, 5698 states have (on average 1.1597051597051597) internal successors, (6608), 5698 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:27,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5699 states to 5699 states and 6608 transitions. [2021-11-09 08:45:27,243 INFO L78 Accepts]: Start accepts. Automaton has 5699 states and 6608 transitions. Word has length 218 [2021-11-09 08:45:27,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:45:27,244 INFO L470 AbstractCegarLoop]: Abstraction has 5699 states and 6608 transitions. [2021-11-09 08:45:27,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:27,245 INFO L276 IsEmpty]: Start isEmpty. Operand 5699 states and 6608 transitions. [2021-11-09 08:45:27,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-09 08:45:27,250 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:45:27,250 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:45:27,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 08:45:27,251 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:45:27,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:45:27,252 INFO L85 PathProgramCache]: Analyzing trace with hash 754737944, now seen corresponding path program 1 times [2021-11-09 08:45:27,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:45:27,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750622975] [2021-11-09 08:45:27,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:45:27,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:45:27,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 127 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:45:27,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:45:27,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750622975] [2021-11-09 08:45:27,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750622975] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:45:27,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170049171] [2021-11-09 08:45:27,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:45:27,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:45:27,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:45:27,424 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:45:27,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:45:27,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:27,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:45:27,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:45:29,133 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 127 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:45:29,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170049171] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:45:29,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:45:29,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-11-09 08:45:29,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778957566] [2021-11-09 08:45:29,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:45:29,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:45:29,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:45:29,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:45:29,152 INFO L87 Difference]: Start difference. First operand 5699 states and 6608 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:33,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:45:33,968 INFO L93 Difference]: Finished difference Result 14808 states and 17306 transitions. [2021-11-09 08:45:33,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:45:33,970 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 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 [2021-11-09 08:45:33,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:45:34,025 INFO L225 Difference]: With dead ends: 14808 [2021-11-09 08:45:34,026 INFO L226 Difference]: Without dead ends: 8686 [2021-11-09 08:45:34,035 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 218 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:45:34,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8686 states. [2021-11-09 08:45:34,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8686 to 8684. [2021-11-09 08:45:34,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8684 states, 8683 states have (on average 1.1249568121616953) internal successors, (9768), 8683 states have internal predecessors, (9768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:34,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8684 states to 8684 states and 9768 transitions. [2021-11-09 08:45:34,291 INFO L78 Accepts]: Start accepts. Automaton has 8684 states and 9768 transitions. Word has length 220 [2021-11-09 08:45:34,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:45:34,292 INFO L470 AbstractCegarLoop]: Abstraction has 8684 states and 9768 transitions. [2021-11-09 08:45:34,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:34,292 INFO L276 IsEmpty]: Start isEmpty. Operand 8684 states and 9768 transitions. [2021-11-09 08:45:34,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-11-09 08:45:34,300 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:45:34,301 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:45:34,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:45:34,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-09 08:45:34,517 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:45:34,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:45:34,518 INFO L85 PathProgramCache]: Analyzing trace with hash 864048720, now seen corresponding path program 1 times [2021-11-09 08:45:34,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:45:34,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962484428] [2021-11-09 08:45:34,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:45:34,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:45:34,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:34,732 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2021-11-09 08:45:34,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:45:34,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962484428] [2021-11-09 08:45:34,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962484428] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:45:34,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:45:34,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:45:34,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407565262] [2021-11-09 08:45:34,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:45:34,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:45:34,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:45:34,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:45:34,738 INFO L87 Difference]: Start difference. First operand 8684 states and 9768 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:37,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:45:37,956 INFO L93 Difference]: Finished difference Result 20329 states and 23085 transitions. [2021-11-09 08:45:37,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:45:37,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 321 [2021-11-09 08:45:37,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:45:37,999 INFO L225 Difference]: With dead ends: 20329 [2021-11-09 08:45:37,999 INFO L226 Difference]: Without dead ends: 11222 [2021-11-09 08:45:38,011 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 [2021-11-09 08:45:38,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11222 states. [2021-11-09 08:45:38,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11222 to 8237. [2021-11-09 08:45:38,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8237 states, 8236 states have (on average 1.1141330743079165) internal successors, (9176), 8236 states have internal predecessors, (9176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:38,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8237 states to 8237 states and 9176 transitions. [2021-11-09 08:45:38,233 INFO L78 Accepts]: Start accepts. Automaton has 8237 states and 9176 transitions. Word has length 321 [2021-11-09 08:45:38,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:45:38,234 INFO L470 AbstractCegarLoop]: Abstraction has 8237 states and 9176 transitions. [2021-11-09 08:45:38,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:38,235 INFO L276 IsEmpty]: Start isEmpty. Operand 8237 states and 9176 transitions. [2021-11-09 08:45:38,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-11-09 08:45:38,243 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:45:38,243 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:45:38,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 08:45:38,244 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:45:38,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:45:38,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1751673542, now seen corresponding path program 1 times [2021-11-09 08:45:38,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:45:38,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546802928] [2021-11-09 08:45:38,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:45:38,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:45:38,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:38,453 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 332 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-09 08:45:38,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:45:38,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546802928] [2021-11-09 08:45:38,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546802928] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:45:38,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:45:38,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:45:38,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004686490] [2021-11-09 08:45:38,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:45:38,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:45:38,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:45:38,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:45:38,458 INFO L87 Difference]: Start difference. First operand 8237 states and 9176 transitions. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:41,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:45:41,564 INFO L93 Difference]: Finished difference Result 19488 states and 21942 transitions. [2021-11-09 08:45:41,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:45:41,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 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 325 [2021-11-09 08:45:41,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:45:41,592 INFO L225 Difference]: With dead ends: 19488 [2021-11-09 08:45:41,592 INFO L226 Difference]: Without dead ends: 10807 [2021-11-09 08:45:41,604 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 [2021-11-09 08:45:41,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10807 states. [2021-11-09 08:45:41,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10807 to 10376. [2021-11-09 08:45:41,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10376 states, 10375 states have (on average 1.1195180722891567) internal successors, (11615), 10375 states have internal predecessors, (11615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:41,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10376 states to 10376 states and 11615 transitions. [2021-11-09 08:45:41,961 INFO L78 Accepts]: Start accepts. Automaton has 10376 states and 11615 transitions. Word has length 325 [2021-11-09 08:45:41,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:45:41,962 INFO L470 AbstractCegarLoop]: Abstraction has 10376 states and 11615 transitions. [2021-11-09 08:45:41,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:41,963 INFO L276 IsEmpty]: Start isEmpty. Operand 10376 states and 11615 transitions. [2021-11-09 08:45:41,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2021-11-09 08:45:41,977 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:45:41,978 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:45:41,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 08:45:41,978 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:45:41,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:45:41,979 INFO L85 PathProgramCache]: Analyzing trace with hash -729878076, now seen corresponding path program 1 times [2021-11-09 08:45:41,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:45:41,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421237576] [2021-11-09 08:45:41,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:45:41,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:45:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:42,294 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 550 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-11-09 08:45:42,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:45:42,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421237576] [2021-11-09 08:45:42,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421237576] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:45:42,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:45:42,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:45:42,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804098056] [2021-11-09 08:45:42,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:45:42,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:45:42,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:45:42,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:45:42,307 INFO L87 Difference]: Start difference. First operand 10376 states and 11615 transitions. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 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) [2021-11-09 08:45:45,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:45:45,815 INFO L93 Difference]: Finished difference Result 28881 states and 32466 transitions. [2021-11-09 08:45:45,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:45:45,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 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 399 [2021-11-09 08:45:45,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:45:45,861 INFO L225 Difference]: With dead ends: 28881 [2021-11-09 08:45:45,861 INFO L226 Difference]: Without dead ends: 18932 [2021-11-09 08:45:45,876 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 [2021-11-09 08:45:45,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18932 states. [2021-11-09 08:45:46,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18932 to 17621. [2021-11-09 08:45:46,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17621 states, 17620 states have (on average 1.1249716231555051) internal successors, (19822), 17620 states have internal predecessors, (19822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:46,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17621 states to 17621 states and 19822 transitions. [2021-11-09 08:45:46,239 INFO L78 Accepts]: Start accepts. Automaton has 17621 states and 19822 transitions. Word has length 399 [2021-11-09 08:45:46,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:45:46,240 INFO L470 AbstractCegarLoop]: Abstraction has 17621 states and 19822 transitions. [2021-11-09 08:45:46,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 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) [2021-11-09 08:45:46,241 INFO L276 IsEmpty]: Start isEmpty. Operand 17621 states and 19822 transitions. [2021-11-09 08:45:46,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2021-11-09 08:45:46,257 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:45:46,257 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:45:46,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 08:45:46,258 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:45:46,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:45:46,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1745983289, now seen corresponding path program 1 times [2021-11-09 08:45:46,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:45:46,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299815277] [2021-11-09 08:45:46,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:45:46,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:45:46,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:46,586 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 567 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-09 08:45:46,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:45:46,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299815277] [2021-11-09 08:45:46,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299815277] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:45:46,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:45:46,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:45:46,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525334296] [2021-11-09 08:45:46,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:45:46,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:45:46,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:45:46,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:45:46,590 INFO L87 Difference]: Start difference. First operand 17621 states and 19822 transitions. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 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) [2021-11-09 08:45:49,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:45:49,504 INFO L93 Difference]: Finished difference Result 40785 states and 46180 transitions. [2021-11-09 08:45:49,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:45:49,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 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 400 [2021-11-09 08:45:49,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:45:49,564 INFO L225 Difference]: With dead ends: 40785 [2021-11-09 08:45:49,565 INFO L226 Difference]: Without dead ends: 23590 [2021-11-09 08:45:49,590 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 [2021-11-09 08:45:49,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23590 states. [2021-11-09 08:45:49,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23590 to 22734. [2021-11-09 08:45:49,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22734 states, 22733 states have (on average 1.1247525623542867) internal successors, (25569), 22733 states have internal predecessors, (25569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:50,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22734 states to 22734 states and 25569 transitions. [2021-11-09 08:45:50,017 INFO L78 Accepts]: Start accepts. Automaton has 22734 states and 25569 transitions. Word has length 400 [2021-11-09 08:45:50,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:45:50,018 INFO L470 AbstractCegarLoop]: Abstraction has 22734 states and 25569 transitions. [2021-11-09 08:45:50,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 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) [2021-11-09 08:45:50,019 INFO L276 IsEmpty]: Start isEmpty. Operand 22734 states and 25569 transitions. [2021-11-09 08:45:50,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2021-11-09 08:45:50,030 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:45:50,031 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:45:50,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 08:45:50,032 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:45:50,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:45:50,032 INFO L85 PathProgramCache]: Analyzing trace with hash -898319440, now seen corresponding path program 1 times [2021-11-09 08:45:50,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:45:50,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103303903] [2021-11-09 08:45:50,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:45:50,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:45:50,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:50,307 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 642 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-09 08:45:50,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:45:50,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103303903] [2021-11-09 08:45:50,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103303903] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:45:50,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:45:50,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:45:50,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214857054] [2021-11-09 08:45:50,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:45:50,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:45:50,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:45:50,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:45:50,311 INFO L87 Difference]: Start difference. First operand 22734 states and 25569 transitions. Second operand has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:54,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:45:54,583 INFO L93 Difference]: Finished difference Result 60825 states and 68580 transitions. [2021-11-09 08:45:54,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:45:54,584 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 404 [2021-11-09 08:45:54,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:45:54,652 INFO L225 Difference]: With dead ends: 60825 [2021-11-09 08:45:54,652 INFO L226 Difference]: Without dead ends: 38518 [2021-11-09 08:45:54,672 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:45:54,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38518 states. [2021-11-09 08:45:55,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38518 to 35524. [2021-11-09 08:45:55,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35524 states, 35523 states have (on average 1.1272978070545843) internal successors, (40045), 35523 states have internal predecessors, (40045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:55,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35524 states to 35524 states and 40045 transitions. [2021-11-09 08:45:55,416 INFO L78 Accepts]: Start accepts. Automaton has 35524 states and 40045 transitions. Word has length 404 [2021-11-09 08:45:55,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:45:55,417 INFO L470 AbstractCegarLoop]: Abstraction has 35524 states and 40045 transitions. [2021-11-09 08:45:55,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:45:55,418 INFO L276 IsEmpty]: Start isEmpty. Operand 35524 states and 40045 transitions. [2021-11-09 08:45:55,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-11-09 08:45:55,432 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:45:55,433 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:45:55,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 08:45:55,434 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:45:55,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:45:55,434 INFO L85 PathProgramCache]: Analyzing trace with hash -626004042, now seen corresponding path program 1 times [2021-11-09 08:45:55,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:45:55,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134489266] [2021-11-09 08:45:55,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:45:55,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:45:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:55,695 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 403 proven. 64 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-11-09 08:45:55,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:45:55,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134489266] [2021-11-09 08:45:55,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134489266] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:45:55,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4883016] [2021-11-09 08:45:55,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:45:55,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:45:55,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:45:55,701 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:45:55,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:45:55,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:56,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:45:56,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:45:57,517 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 403 proven. 64 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-11-09 08:45:57,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4883016] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:45:57,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:45:57,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-09 08:45:57,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902289399] [2021-11-09 08:45:57,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:45:57,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:45:57,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:45:57,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:45:57,521 INFO L87 Difference]: Start difference. First operand 35524 states and 40045 transitions. Second operand has 5 states, 5 states have (on average 67.4) internal successors, (337), 5 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:06,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:06,289 INFO L93 Difference]: Finished difference Result 96644 states and 108691 transitions. [2021-11-09 08:46:06,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:46:06,290 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 67.4) internal successors, (337), 5 states have internal predecessors, (337), 0 states have call successors, (0), 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 419 [2021-11-09 08:46:06,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:06,363 INFO L225 Difference]: With dead ends: 96644 [2021-11-09 08:46:06,364 INFO L226 Difference]: Without dead ends: 60694 [2021-11-09 08:46:06,385 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 420 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:46:06,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60694 states. [2021-11-09 08:46:07,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60694 to 55959. [2021-11-09 08:46:07,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55959 states, 55958 states have (on average 1.1058115014832552) internal successors, (61879), 55958 states have internal predecessors, (61879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:07,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55959 states to 55959 states and 61879 transitions. [2021-11-09 08:46:07,367 INFO L78 Accepts]: Start accepts. Automaton has 55959 states and 61879 transitions. Word has length 419 [2021-11-09 08:46:07,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:07,368 INFO L470 AbstractCegarLoop]: Abstraction has 55959 states and 61879 transitions. [2021-11-09 08:46:07,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.4) internal successors, (337), 5 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:07,369 INFO L276 IsEmpty]: Start isEmpty. Operand 55959 states and 61879 transitions. [2021-11-09 08:46:07,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2021-11-09 08:46:07,381 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:07,382 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:07,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:07,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:07,601 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:07,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:07,602 INFO L85 PathProgramCache]: Analyzing trace with hash 669555630, now seen corresponding path program 1 times [2021-11-09 08:46:07,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:07,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253048008] [2021-11-09 08:46:07,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:07,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:07,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 583 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-11-09 08:46:07,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:07,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253048008] [2021-11-09 08:46:07,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253048008] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:46:07,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:46:07,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:46:07,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481037822] [2021-11-09 08:46:07,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:46:07,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:07,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:46:07,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:46:07,861 INFO L87 Difference]: Start difference. First operand 55959 states and 61879 transitions. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:11,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:11,447 INFO L93 Difference]: Finished difference Result 129367 states and 143613 transitions. [2021-11-09 08:46:11,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:46:11,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 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 423 [2021-11-09 08:46:11,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:11,648 INFO L225 Difference]: With dead ends: 129367 [2021-11-09 08:46:11,648 INFO L226 Difference]: Without dead ends: 73835 [2021-11-09 08:46:11,695 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 [2021-11-09 08:46:11,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73835 states. [2021-11-09 08:46:12,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73835 to 72544. [2021-11-09 08:46:12,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72544 states, 72543 states have (on average 1.1017879051045587) internal successors, (79927), 72543 states have internal predecessors, (79927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:12,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72544 states to 72544 states and 79927 transitions. [2021-11-09 08:46:12,915 INFO L78 Accepts]: Start accepts. Automaton has 72544 states and 79927 transitions. Word has length 423 [2021-11-09 08:46:12,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:12,916 INFO L470 AbstractCegarLoop]: Abstraction has 72544 states and 79927 transitions. [2021-11-09 08:46:12,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:12,917 INFO L276 IsEmpty]: Start isEmpty. Operand 72544 states and 79927 transitions. [2021-11-09 08:46:12,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2021-11-09 08:46:12,939 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:12,940 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:12,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 08:46:12,940 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:12,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:12,941 INFO L85 PathProgramCache]: Analyzing trace with hash 2035197182, now seen corresponding path program 1 times [2021-11-09 08:46:12,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:12,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040404524] [2021-11-09 08:46:12,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:12,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 560 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-11-09 08:46:13,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:13,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040404524] [2021-11-09 08:46:13,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040404524] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:46:13,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:46:13,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:46:13,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172475124] [2021-11-09 08:46:13,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:46:13,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:13,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:46:13,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:46:13,752 INFO L87 Difference]: Start difference. First operand 72544 states and 79927 transitions. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:17,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:17,285 INFO L93 Difference]: Finished difference Result 154886 states and 170722 transitions. [2021-11-09 08:46:17,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:46:17,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2021-11-09 08:46:17,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:17,378 INFO L225 Difference]: With dead ends: 154886 [2021-11-09 08:46:17,378 INFO L226 Difference]: Without dead ends: 81917 [2021-11-09 08:46:17,402 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 [2021-11-09 08:46:17,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81917 states. [2021-11-09 08:46:18,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81917 to 81475. [2021-11-09 08:46:18,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81475 states, 81474 states have (on average 1.0948400716793087) internal successors, (89201), 81474 states have internal predecessors, (89201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:18,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81475 states to 81475 states and 89201 transitions. [2021-11-09 08:46:18,740 INFO L78 Accepts]: Start accepts. Automaton has 81475 states and 89201 transitions. Word has length 424 [2021-11-09 08:46:18,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:18,741 INFO L470 AbstractCegarLoop]: Abstraction has 81475 states and 89201 transitions. [2021-11-09 08:46:18,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:18,742 INFO L276 IsEmpty]: Start isEmpty. Operand 81475 states and 89201 transitions. [2021-11-09 08:46:18,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2021-11-09 08:46:18,756 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:18,757 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:18,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 08:46:18,758 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:18,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:18,759 INFO L85 PathProgramCache]: Analyzing trace with hash 762856630, now seen corresponding path program 1 times [2021-11-09 08:46:18,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:18,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705681325] [2021-11-09 08:46:18,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:18,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:19,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:19,332 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 560 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-11-09 08:46:19,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:19,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705681325] [2021-11-09 08:46:19,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705681325] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:46:19,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:46:19,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:46:19,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786541718] [2021-11-09 08:46:19,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:46:19,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:19,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:46:19,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:46:19,339 INFO L87 Difference]: Start difference. First operand 81475 states and 89201 transitions. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:22,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:22,951 INFO L93 Difference]: Finished difference Result 177872 states and 195399 transitions. [2021-11-09 08:46:22,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:46:22,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 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 447 [2021-11-09 08:46:22,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:23,093 INFO L225 Difference]: With dead ends: 177872 [2021-11-09 08:46:23,094 INFO L226 Difference]: Without dead ends: 96823 [2021-11-09 08:46:23,130 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 [2021-11-09 08:46:23,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96823 states. [2021-11-09 08:46:24,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96823 to 93817. [2021-11-09 08:46:24,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93817 states, 93816 states have (on average 1.094504135755095) internal successors, (102682), 93816 states have internal predecessors, (102682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:24,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93817 states to 93817 states and 102682 transitions. [2021-11-09 08:46:24,782 INFO L78 Accepts]: Start accepts. Automaton has 93817 states and 102682 transitions. Word has length 447 [2021-11-09 08:46:24,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:24,782 INFO L470 AbstractCegarLoop]: Abstraction has 93817 states and 102682 transitions. [2021-11-09 08:46:24,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:24,783 INFO L276 IsEmpty]: Start isEmpty. Operand 93817 states and 102682 transitions. [2021-11-09 08:46:24,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2021-11-09 08:46:24,803 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:24,804 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:24,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 08:46:24,805 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:24,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:24,805 INFO L85 PathProgramCache]: Analyzing trace with hash -2117673494, now seen corresponding path program 1 times [2021-11-09 08:46:24,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:24,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712852062] [2021-11-09 08:46:24,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:24,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:24,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 567 proven. 141 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-09 08:46:25,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:25,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712852062] [2021-11-09 08:46:25,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712852062] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:25,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046809007] [2021-11-09 08:46:25,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:25,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:25,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:46:25,177 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:46:25,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:46:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:26,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:46:26,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:46:35,536 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 255 proven. 0 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2021-11-09 08:46:35,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046809007] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:46:35,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:46:35,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-09 08:46:35,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452271696] [2021-11-09 08:46:35,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:46:35,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:35,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:46:35,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:46:35,542 INFO L87 Difference]: Start difference. First operand 93817 states and 102682 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:53,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:46:53,962 INFO L93 Difference]: Finished difference Result 193181 states and 211296 transitions. [2021-11-09 08:46:53,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:46:53,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 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 511 [2021-11-09 08:46:53,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:46:54,079 INFO L225 Difference]: With dead ends: 193181 [2021-11-09 08:46:54,080 INFO L226 Difference]: Without dead ends: 99359 [2021-11-09 08:46:54,344 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 511 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:46:54,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99359 states. [2021-11-09 08:46:55,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99359 to 98046. [2021-11-09 08:46:55,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98046 states, 98045 states have (on average 1.088173797745933) internal successors, (106690), 98045 states have internal predecessors, (106690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:55,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98046 states to 98046 states and 106690 transitions. [2021-11-09 08:46:55,652 INFO L78 Accepts]: Start accepts. Automaton has 98046 states and 106690 transitions. Word has length 511 [2021-11-09 08:46:55,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:46:55,653 INFO L470 AbstractCegarLoop]: Abstraction has 98046 states and 106690 transitions. [2021-11-09 08:46:55,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:46:55,653 INFO L276 IsEmpty]: Start isEmpty. Operand 98046 states and 106690 transitions. [2021-11-09 08:46:55,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2021-11-09 08:46:55,667 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:46:55,668 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:46:55,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:46:55,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:46:55,873 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:46:55,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:46:55,874 INFO L85 PathProgramCache]: Analyzing trace with hash 367545306, now seen corresponding path program 1 times [2021-11-09 08:46:55,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:46:55,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138145607] [2021-11-09 08:46:55,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:46:55,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:46:55,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:46:56,109 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 505 proven. 0 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2021-11-09 08:46:56,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:46:56,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138145607] [2021-11-09 08:46:56,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138145607] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:46:56,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:46:56,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:46:56,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032479727] [2021-11-09 08:46:56,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:46:56,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:56,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:46:56,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:46:56,113 INFO L87 Difference]: Start difference. First operand 98046 states and 106690 transitions. Second operand has 4 states, 4 states have (on average 75.75) internal successors, (303), 4 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:01,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:47:01,365 INFO L93 Difference]: Finished difference Result 213994 states and 232952 transitions. [2021-11-09 08:47:01,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:47:01,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.75) internal successors, (303), 4 states have internal predecessors, (303), 0 states have call successors, (0), 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 524 [2021-11-09 08:47:01,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:47:01,505 INFO L225 Difference]: With dead ends: 213994 [2021-11-09 08:47:01,505 INFO L226 Difference]: Without dead ends: 116375 [2021-11-09 08:47:01,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:47:01,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116375 states. [2021-11-09 08:47:03,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116375 to 89953. [2021-11-09 08:47:03,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89953 states, 89952 states have (on average 1.0856790288153682) internal successors, (97659), 89952 states have internal predecessors, (97659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:03,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89953 states to 89953 states and 97659 transitions. [2021-11-09 08:47:03,198 INFO L78 Accepts]: Start accepts. Automaton has 89953 states and 97659 transitions. Word has length 524 [2021-11-09 08:47:03,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:47:03,198 INFO L470 AbstractCegarLoop]: Abstraction has 89953 states and 97659 transitions. [2021-11-09 08:47:03,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.75) internal successors, (303), 4 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:03,199 INFO L276 IsEmpty]: Start isEmpty. Operand 89953 states and 97659 transitions. [2021-11-09 08:47:03,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2021-11-09 08:47:03,218 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:47:03,218 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:47:03,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-09 08:47:03,219 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:47:03,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:03,219 INFO L85 PathProgramCache]: Analyzing trace with hash -353512245, now seen corresponding path program 1 times [2021-11-09 08:47:03,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:03,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433276587] [2021-11-09 08:47:03,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:03,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 255 proven. 0 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2021-11-09 08:47:04,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:47:04,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433276587] [2021-11-09 08:47:04,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433276587] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:47:04,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:47:04,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:47:04,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592661985] [2021-11-09 08:47:04,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:47:04,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:47:04,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:47:04,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:47:04,037 INFO L87 Difference]: Start difference. First operand 89953 states and 97659 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 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) [2021-11-09 08:47:06,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:47:06,805 INFO L93 Difference]: Finished difference Result 187130 states and 203221 transitions. [2021-11-09 08:47:06,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:47:06,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 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 554 [2021-11-09 08:47:06,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:47:06,896 INFO L225 Difference]: With dead ends: 187130 [2021-11-09 08:47:06,896 INFO L226 Difference]: Without dead ends: 96326 [2021-11-09 08:47:06,937 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 [2021-11-09 08:47:07,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96326 states. [2021-11-09 08:47:08,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96326 to 80576. [2021-11-09 08:47:08,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80576 states, 80575 states have (on average 1.082271175923053) internal successors, (87204), 80575 states have internal predecessors, (87204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:08,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80576 states to 80576 states and 87204 transitions. [2021-11-09 08:47:08,557 INFO L78 Accepts]: Start accepts. Automaton has 80576 states and 87204 transitions. Word has length 554 [2021-11-09 08:47:08,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:47:08,558 INFO L470 AbstractCegarLoop]: Abstraction has 80576 states and 87204 transitions. [2021-11-09 08:47:08,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 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) [2021-11-09 08:47:08,558 INFO L276 IsEmpty]: Start isEmpty. Operand 80576 states and 87204 transitions. [2021-11-09 08:47:08,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2021-11-09 08:47:08,584 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:47:08,585 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:47:08,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-09 08:47:08,585 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:47:08,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:08,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1916955799, now seen corresponding path program 1 times [2021-11-09 08:47:08,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:08,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3501763] [2021-11-09 08:47:08,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:08,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:08,904 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-11-09 08:47:08,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:47:08,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3501763] [2021-11-09 08:47:08,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3501763] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:47:08,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:47:08,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:47:08,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282598934] [2021-11-09 08:47:08,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:47:08,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:47:08,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:47:08,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:47:08,910 INFO L87 Difference]: Start difference. First operand 80576 states and 87204 transitions. Second operand has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:12,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:47:12,025 INFO L93 Difference]: Finished difference Result 168808 states and 182585 transitions. [2021-11-09 08:47:12,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:47:12,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 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 662 [2021-11-09 08:47:12,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:47:12,135 INFO L225 Difference]: With dead ends: 168808 [2021-11-09 08:47:12,135 INFO L226 Difference]: Without dead ends: 88231 [2021-11-09 08:47:12,169 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 [2021-11-09 08:47:12,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88231 states. [2021-11-09 08:47:13,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88231 to 87374. [2021-11-09 08:47:13,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87374 states, 87373 states have (on average 1.0737298707838807) internal successors, (93815), 87373 states have internal predecessors, (93815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:13,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87374 states to 87374 states and 93815 transitions. [2021-11-09 08:47:13,566 INFO L78 Accepts]: Start accepts. Automaton has 87374 states and 93815 transitions. Word has length 662 [2021-11-09 08:47:13,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:47:13,567 INFO L470 AbstractCegarLoop]: Abstraction has 87374 states and 93815 transitions. [2021-11-09 08:47:13,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:13,567 INFO L276 IsEmpty]: Start isEmpty. Operand 87374 states and 93815 transitions. [2021-11-09 08:47:13,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2021-11-09 08:47:13,610 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:47:13,611 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:47:13,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-09 08:47:13,611 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:47:13,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:13,612 INFO L85 PathProgramCache]: Analyzing trace with hash 670619507, now seen corresponding path program 1 times [2021-11-09 08:47:13,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:13,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083197014] [2021-11-09 08:47:13,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:13,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 729 proven. 0 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-11-09 08:47:14,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:47:14,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083197014] [2021-11-09 08:47:14,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083197014] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:47:14,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:47:14,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:47:14,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870285506] [2021-11-09 08:47:14,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:47:14,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:47:14,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:47:14,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:47:14,571 INFO L87 Difference]: Start difference. First operand 87374 states and 93815 transitions. Second operand has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:17,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:47:17,853 INFO L93 Difference]: Finished difference Result 182005 states and 195659 transitions. [2021-11-09 08:47:17,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:47:17,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 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 845 [2021-11-09 08:47:17,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:47:17,956 INFO L225 Difference]: With dead ends: 182005 [2021-11-09 08:47:17,956 INFO L226 Difference]: Without dead ends: 95058 [2021-11-09 08:47:18,001 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 [2021-11-09 08:47:18,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95058 states. [2021-11-09 08:47:19,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95058 to 93757. [2021-11-09 08:47:19,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93757 states, 93756 states have (on average 1.071387431204403) internal successors, (100449), 93756 states have internal predecessors, (100449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:19,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93757 states to 93757 states and 100449 transitions. [2021-11-09 08:47:19,853 INFO L78 Accepts]: Start accepts. Automaton has 93757 states and 100449 transitions. Word has length 845 [2021-11-09 08:47:19,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:47:19,854 INFO L470 AbstractCegarLoop]: Abstraction has 93757 states and 100449 transitions. [2021-11-09 08:47:19,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:19,854 INFO L276 IsEmpty]: Start isEmpty. Operand 93757 states and 100449 transitions. [2021-11-09 08:47:19,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 873 [2021-11-09 08:47:19,903 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:47:19,905 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:47:19,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-09 08:47:19,905 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:47:19,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:19,906 INFO L85 PathProgramCache]: Analyzing trace with hash -2081068811, now seen corresponding path program 1 times [2021-11-09 08:47:19,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:19,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123671455] [2021-11-09 08:47:19,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:19,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 931 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-09 08:47:20,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:47:20,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123671455] [2021-11-09 08:47:20,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123671455] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:47:20,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:47:20,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:47:20,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854773736] [2021-11-09 08:47:20,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:47:20,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:47:20,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:47:20,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:47:20,592 INFO L87 Difference]: Start difference. First operand 93757 states and 100449 transitions. Second operand has 4 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:25,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:47:25,823 INFO L93 Difference]: Finished difference Result 211787 states and 226672 transitions. [2021-11-09 08:47:25,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:47:25,824 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 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 872 [2021-11-09 08:47:25,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:47:25,957 INFO L225 Difference]: With dead ends: 211787 [2021-11-09 08:47:25,957 INFO L226 Difference]: Without dead ends: 118457 [2021-11-09 08:47:26,005 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:47:26,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118457 states. [2021-11-09 08:47:28,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118457 to 116743. [2021-11-09 08:47:28,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116743 states, 116742 states have (on average 1.0696750098507821) internal successors, (124876), 116742 states have internal predecessors, (124876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:28,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116743 states to 116743 states and 124876 transitions. [2021-11-09 08:47:28,564 INFO L78 Accepts]: Start accepts. Automaton has 116743 states and 124876 transitions. Word has length 872 [2021-11-09 08:47:28,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:47:28,565 INFO L470 AbstractCegarLoop]: Abstraction has 116743 states and 124876 transitions. [2021-11-09 08:47:28,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:28,566 INFO L276 IsEmpty]: Start isEmpty. Operand 116743 states and 124876 transitions. [2021-11-09 08:47:28,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 884 [2021-11-09 08:47:28,605 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:47:28,606 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:47:28,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-09 08:47:28,607 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:47:28,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:28,608 INFO L85 PathProgramCache]: Analyzing trace with hash -777347394, now seen corresponding path program 1 times [2021-11-09 08:47:28,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:28,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622895654] [2021-11-09 08:47:28,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:28,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:29,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 679 proven. 0 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-11-09 08:47:29,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:47:29,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622895654] [2021-11-09 08:47:29,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622895654] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:47:29,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:47:29,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:47:29,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516202507] [2021-11-09 08:47:29,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:47:29,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:47:29,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:47:29,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:47:29,103 INFO L87 Difference]: Start difference. First operand 116743 states and 124876 transitions. Second operand has 3 states, 3 states have (on average 211.33333333333334) internal successors, (634), 2 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:31,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:47:31,585 INFO L93 Difference]: Finished difference Result 226232 states and 241708 transitions. [2021-11-09 08:47:31,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:47:31,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 211.33333333333334) internal successors, (634), 2 states have internal predecessors, (634), 0 states have call successors, (0), 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 883 [2021-11-09 08:47:31,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:47:31,748 INFO L225 Difference]: With dead ends: 226232 [2021-11-09 08:47:31,748 INFO L226 Difference]: Without dead ends: 109915 [2021-11-09 08:47:31,801 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:47:31,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109915 states. [2021-11-09 08:47:33,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109915 to 103092. [2021-11-09 08:47:33,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103092 states, 103091 states have (on average 1.0684831847590963) internal successors, (110151), 103091 states have internal predecessors, (110151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:34,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103092 states to 103092 states and 110151 transitions. [2021-11-09 08:47:34,310 INFO L78 Accepts]: Start accepts. Automaton has 103092 states and 110151 transitions. Word has length 883 [2021-11-09 08:47:34,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:47:34,311 INFO L470 AbstractCegarLoop]: Abstraction has 103092 states and 110151 transitions. [2021-11-09 08:47:34,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 211.33333333333334) internal successors, (634), 2 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:34,311 INFO L276 IsEmpty]: Start isEmpty. Operand 103092 states and 110151 transitions. [2021-11-09 08:47:34,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1001 [2021-11-09 08:47:34,387 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:47:34,388 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:47:34,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-09 08:47:34,388 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:47:34,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:34,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1363994050, now seen corresponding path program 1 times [2021-11-09 08:47:34,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:34,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393429704] [2021-11-09 08:47:34,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:34,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:35,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 1333 proven. 108 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-09 08:47:35,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:47:35,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393429704] [2021-11-09 08:47:35,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393429704] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:35,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162524744] [2021-11-09 08:47:35,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:35,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:47:35,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:47:35,196 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:47:35,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 08:47:36,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:36,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 1209 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:47:36,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:47:39,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 1251 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-09 08:47:39,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162524744] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:47:39,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:47:39,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-09 08:47:39,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466806655] [2021-11-09 08:47:39,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:47:39,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:47:39,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:47:39,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:47:39,532 INFO L87 Difference]: Start difference. First operand 103092 states and 110151 transitions. Second operand has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:44,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:47:44,769 INFO L93 Difference]: Finished difference Result 236013 states and 252225 transitions. [2021-11-09 08:47:44,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:47:44,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 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 1000 [2021-11-09 08:47:44,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:47:44,911 INFO L225 Difference]: With dead ends: 236013 [2021-11-09 08:47:44,911 INFO L226 Difference]: Without dead ends: 133348 [2021-11-09 08:47:44,964 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1004 GetRequests, 999 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:47:45,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133348 states. [2021-11-09 08:47:47,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133348 to 115470. [2021-11-09 08:47:47,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115470 states, 115469 states have (on average 1.067637201326763) internal successors, (123279), 115469 states have internal predecessors, (123279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:47,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115470 states to 115470 states and 123279 transitions. [2021-11-09 08:47:47,336 INFO L78 Accepts]: Start accepts. Automaton has 115470 states and 123279 transitions. Word has length 1000 [2021-11-09 08:47:47,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:47:47,337 INFO L470 AbstractCegarLoop]: Abstraction has 115470 states and 123279 transitions. [2021-11-09 08:47:47,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:47:47,338 INFO L276 IsEmpty]: Start isEmpty. Operand 115470 states and 123279 transitions. [2021-11-09 08:47:47,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1039 [2021-11-09 08:47:47,399 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:47:47,400 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:47:47,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 08:47:47,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76569bbe-da15-49c6-bd2c-3198bb3f80cb/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-09 08:47:47,613 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:47:47,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:47,614 INFO L85 PathProgramCache]: Analyzing trace with hash -2069558779, now seen corresponding path program 1 times [2021-11-09 08:47:47,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:47,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382674417] [2021-11-09 08:47:47,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:47,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:47,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:48,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1583 backedges. 1001 proven. 0 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2021-11-09 08:47:48,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:47:48,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382674417] [2021-11-09 08:47:48,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382674417] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:47:48,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:47:48,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:47:48,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156725381] [2021-11-09 08:47:48,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:47:48,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:47:48,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:47:48,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:47:48,108 INFO L87 Difference]: Start difference. First operand 115470 states and 123279 transitions. Second operand has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)