./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem19_label37.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_18817ea4-eff6-41d3-96c0-79849c11d0c9/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18817ea4-eff6-41d3-96c0-79849c11d0c9/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_18817ea4-eff6-41d3-96c0-79849c11d0c9/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18817ea4-eff6-41d3-96c0-79849c11d0c9/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem19_label37.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18817ea4-eff6-41d3-96c0-79849c11d0c9/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_18817ea4-eff6-41d3-96c0-79849c11d0c9/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 3ac46a6c4d9bc7297b40bc12f5914a2752e0cec6b52579c95d26ee7a4d471018 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:35:47,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:35:47,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:35:47,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:35:47,104 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:35:47,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:35:47,107 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:35:47,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:35:47,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:35:47,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:35:47,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:35:47,117 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:35:47,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:35:47,119 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:35:47,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:35:47,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:35:47,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:35:47,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:35:47,127 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:35:47,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:35:47,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:35:47,135 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:35:47,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:35:47,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:35:47,142 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:35:47,143 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:35:47,143 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:35:47,144 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:35:47,145 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:35:47,146 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:35:47,147 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:35:47,148 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:35:47,149 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:35:47,151 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:35:47,152 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:35:47,153 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:35:47,154 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:35:47,154 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:35:47,155 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:35:47,156 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:35:47,157 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:35:47,171 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18817ea4-eff6-41d3-96c0-79849c11d0c9/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:35:47,206 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:35:47,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:35:47,207 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:35:47,207 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:35:47,208 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:35:47,208 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:35:47,209 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:35:47,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:35:47,209 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:35:47,214 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:35:47,214 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:35:47,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:35:47,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:35:47,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:35:47,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:35:47,216 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:35:47,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:35:47,216 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:35:47,216 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:35:47,217 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:35:47,217 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:35:47,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:35:47,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:35:47,218 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:35:47,218 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:35:47,218 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:35:47,218 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:35:47,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:35:47,219 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:35:47,219 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:35:47,219 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:35:47,221 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:35:47,222 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_18817ea4-eff6-41d3-96c0-79849c11d0c9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18817ea4-eff6-41d3-96c0-79849c11d0c9/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ac46a6c4d9bc7297b40bc12f5914a2752e0cec6b52579c95d26ee7a4d471018 [2021-11-09 09:35:47,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:35:47,615 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:35:47,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:35:47,619 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:35:47,620 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:35:47,621 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18817ea4-eff6-41d3-96c0-79849c11d0c9/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/eca-rers2012/Problem19_label37.c [2021-11-09 09:35:47,699 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18817ea4-eff6-41d3-96c0-79849c11d0c9/bin/uautomizer-IVEQpCNsaX/data/083e81597/4516d0380cb44b95aa1d0daa4d9fe7c5/FLAG744e9098c [2021-11-09 09:35:48,842 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:35:48,847 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18817ea4-eff6-41d3-96c0-79849c11d0c9/sv-benchmarks/c/eca-rers2012/Problem19_label37.c [2021-11-09 09:35:48,911 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18817ea4-eff6-41d3-96c0-79849c11d0c9/bin/uautomizer-IVEQpCNsaX/data/083e81597/4516d0380cb44b95aa1d0daa4d9fe7c5/FLAG744e9098c [2021-11-09 09:35:49,126 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18817ea4-eff6-41d3-96c0-79849c11d0c9/bin/uautomizer-IVEQpCNsaX/data/083e81597/4516d0380cb44b95aa1d0daa4d9fe7c5 [2021-11-09 09:35:49,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:35:49,131 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:35:49,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:35:49,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:35:49,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:35:49,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:35:49" (1/1) ... [2021-11-09 09:35:49,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71f9391b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:49, skipping insertion in model container [2021-11-09 09:35:49,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:35:49" (1/1) ... [2021-11-09 09:35:49,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:35:49,360 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:35:49,762 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_18817ea4-eff6-41d3-96c0-79849c11d0c9/sv-benchmarks/c/eca-rers2012/Problem19_label37.c[5183,5196] [2021-11-09 09:35:51,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:35:51,522 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:35:51,561 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_18817ea4-eff6-41d3-96c0-79849c11d0c9/sv-benchmarks/c/eca-rers2012/Problem19_label37.c[5183,5196] [2021-11-09 09:35:52,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:35:52,818 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:35:52,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:52 WrapperNode [2021-11-09 09:35:52,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:35:52,820 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:35:52,820 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:35:52,821 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:35:52,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:52" (1/1) ... [2021-11-09 09:35:52,917 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:52" (1/1) ... [2021-11-09 09:35:54,063 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:35:54,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:35:54,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:35:54,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:35:54,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:52" (1/1) ... [2021-11-09 09:35:54,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:52" (1/1) ... [2021-11-09 09:35:54,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:52" (1/1) ... [2021-11-09 09:35:54,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:52" (1/1) ... [2021-11-09 09:35:54,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:52" (1/1) ... [2021-11-09 09:35:54,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:52" (1/1) ... [2021-11-09 09:35:54,838 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:52" (1/1) ... [2021-11-09 09:35:55,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:35:55,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:35:55,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:35:55,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:35:55,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:52" (1/1) ... [2021-11-09 09:35:55,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:35:55,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18817ea4-eff6-41d3-96c0-79849c11d0c9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:35:55,128 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18817ea4-eff6-41d3-96c0-79849c11d0c9/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:35:55,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18817ea4-eff6-41d3-96c0-79849c11d0c9/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:35:55,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:35:55,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:35:55,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:35:55,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:36:04,686 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:36:04,687 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-09 09:36:04,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:36:04 BoogieIcfgContainer [2021-11-09 09:36:04,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:36:04,693 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:36:04,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:36:04,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:36:04,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:35:49" (1/3) ... [2021-11-09 09:36:04,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@362a88e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:36:04, skipping insertion in model container [2021-11-09 09:36:04,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:35:52" (2/3) ... [2021-11-09 09:36:04,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@362a88e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:36:04, skipping insertion in model container [2021-11-09 09:36:04,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:36:04" (3/3) ... [2021-11-09 09:36:04,700 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label37.c [2021-11-09 09:36:04,706 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:36:04,706 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 09:36:04,763 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:36:04,769 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 09:36:04,770 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 09:36:04,818 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states 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 09:36:04,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 09:36:04,825 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:04,825 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] [2021-11-09 09:36:04,826 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:04,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:04,831 INFO L85 PathProgramCache]: Analyzing trace with hash 323974986, now seen corresponding path program 1 times [2021-11-09 09:36:04,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:04,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731265720] [2021-11-09 09:36:04,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:04,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:05,077 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 09:36:05,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:05,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731265720] [2021-11-09 09:36:05,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731265720] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:05,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:05,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:36:05,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358200975] [2021-11-09 09:36:05,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:36:05,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:05,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:36:05,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:36:05,106 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 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 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 09:36:13,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:13,746 INFO L93 Difference]: Finished difference Result 4919 states and 9313 transitions. [2021-11-09 09:36:13,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:36:13,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-09 09:36:13,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:13,783 INFO L225 Difference]: With dead ends: 4919 [2021-11-09 09:36:13,784 INFO L226 Difference]: Without dead ends: 3107 [2021-11-09 09:36:13,791 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 09:36:13,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2021-11-09 09:36:13,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 3106. [2021-11-09 09:36:13,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3106 states, 3105 states have (on average 1.652818035426731) internal successors, (5132), 3105 states have internal predecessors, (5132), 0 states have call successors, (0), 0 states 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 09:36:13,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3106 states to 3106 states and 5132 transitions. [2021-11-09 09:36:13,944 INFO L78 Accepts]: Start accepts. Automaton has 3106 states and 5132 transitions. Word has length 38 [2021-11-09 09:36:13,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:13,945 INFO L470 AbstractCegarLoop]: Abstraction has 3106 states and 5132 transitions. [2021-11-09 09:36:13,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 09:36:13,945 INFO L276 IsEmpty]: Start isEmpty. Operand 3106 states and 5132 transitions. [2021-11-09 09:36:13,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-09 09:36:13,950 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:13,950 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:36:13,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:36:13,951 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:13,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:13,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1995074114, now seen corresponding path program 1 times [2021-11-09 09:36:13,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:13,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346175882] [2021-11-09 09:36:13,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:13,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:14,216 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:14,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:14,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346175882] [2021-11-09 09:36:14,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346175882] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:14,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:14,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:36:14,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003539791] [2021-11-09 09:36:14,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:36:14,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:14,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:36:14,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:36:14,224 INFO L87 Difference]: Start difference. First operand 3106 states and 5132 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:28,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:28,444 INFO L93 Difference]: Finished difference Result 10391 states and 16943 transitions. [2021-11-09 09:36:28,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:36:28,445 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-09 09:36:28,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:28,491 INFO L225 Difference]: With dead ends: 10391 [2021-11-09 09:36:28,491 INFO L226 Difference]: Without dead ends: 7287 [2021-11-09 09:36:28,497 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:36:28,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7287 states. [2021-11-09 09:36:28,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7287 to 7236. [2021-11-09 09:36:28,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7236 states, 7235 states have (on average 1.5214927436074637) internal successors, (11008), 7235 states have internal predecessors, (11008), 0 states have call successors, (0), 0 states 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 09:36:28,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7236 states to 7236 states and 11008 transitions. [2021-11-09 09:36:28,720 INFO L78 Accepts]: Start accepts. Automaton has 7236 states and 11008 transitions. Word has length 107 [2021-11-09 09:36:28,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:28,721 INFO L470 AbstractCegarLoop]: Abstraction has 7236 states and 11008 transitions. [2021-11-09 09:36:28,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:36:28,721 INFO L276 IsEmpty]: Start isEmpty. Operand 7236 states and 11008 transitions. [2021-11-09 09:36:28,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-11-09 09:36:28,726 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:28,727 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:36:28,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:36:28,727 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:28,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:28,728 INFO L85 PathProgramCache]: Analyzing trace with hash -766359453, now seen corresponding path program 1 times [2021-11-09 09:36:28,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:28,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170705568] [2021-11-09 09:36:28,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:28,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:29,179 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:29,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:29,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170705568] [2021-11-09 09:36:29,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170705568] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:29,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:29,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:36:29,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149741106] [2021-11-09 09:36:29,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:36:29,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:29,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:36:29,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:36:29,191 INFO L87 Difference]: Start difference. First operand 7236 states and 11008 transitions. Second operand has 4 states, 4 states have (on average 68.25) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states 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 09:36:37,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:37,680 INFO L93 Difference]: Finished difference Result 13136 states and 20668 transitions. [2021-11-09 09:36:37,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:36:37,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 68.25) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 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 273 [2021-11-09 09:36:37,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:37,723 INFO L225 Difference]: With dead ends: 13136 [2021-11-09 09:36:37,724 INFO L226 Difference]: Without dead ends: 7236 [2021-11-09 09:36:37,731 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:36:37,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7236 states. [2021-11-09 09:36:37,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7236 to 7236. [2021-11-09 09:36:37,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7236 states, 7235 states have (on average 1.5202487906012438) internal successors, (10999), 7235 states have internal predecessors, (10999), 0 states have call successors, (0), 0 states 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 09:36:37,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7236 states to 7236 states and 10999 transitions. [2021-11-09 09:36:37,936 INFO L78 Accepts]: Start accepts. Automaton has 7236 states and 10999 transitions. Word has length 273 [2021-11-09 09:36:37,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:37,939 INFO L470 AbstractCegarLoop]: Abstraction has 7236 states and 10999 transitions. [2021-11-09 09:36:37,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.25) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states 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 09:36:37,939 INFO L276 IsEmpty]: Start isEmpty. Operand 7236 states and 10999 transitions. [2021-11-09 09:36:37,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2021-11-09 09:36:37,959 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:37,960 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:36:37,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:36:37,960 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:37,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:37,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1783465881, now seen corresponding path program 1 times [2021-11-09 09:36:37,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:37,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563979746] [2021-11-09 09:36:37,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:37,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:38,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-09 09:36:38,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:38,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563979746] [2021-11-09 09:36:38,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563979746] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:38,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:38,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:36:38,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443580624] [2021-11-09 09:36:38,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:36:38,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:38,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:36:38,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:36:38,543 INFO L87 Difference]: Start difference. First operand 7236 states and 10999 transitions. Second operand has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 2 states have internal predecessors, (518), 0 states have call successors, (0), 0 states 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 09:36:45,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:45,068 INFO L93 Difference]: Finished difference Result 15842 states and 24472 transitions. [2021-11-09 09:36:45,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:36:45,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 2 states have internal predecessors, (518), 0 states have call successors, (0), 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 590 [2021-11-09 09:36:45,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:45,128 INFO L225 Difference]: With dead ends: 15842 [2021-11-09 09:36:45,129 INFO L226 Difference]: Without dead ends: 9973 [2021-11-09 09:36:45,139 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 09:36:45,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9973 states. [2021-11-09 09:36:45,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9973 to 9969. [2021-11-09 09:36:45,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9969 states, 9968 states have (on average 1.3901484751203852) internal successors, (13857), 9968 states have internal predecessors, (13857), 0 states have call successors, (0), 0 states 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 09:36:45,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9969 states to 9969 states and 13857 transitions. [2021-11-09 09:36:45,408 INFO L78 Accepts]: Start accepts. Automaton has 9969 states and 13857 transitions. Word has length 590 [2021-11-09 09:36:45,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:45,409 INFO L470 AbstractCegarLoop]: Abstraction has 9969 states and 13857 transitions. [2021-11-09 09:36:45,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 2 states have internal predecessors, (518), 0 states have call successors, (0), 0 states 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 09:36:45,411 INFO L276 IsEmpty]: Start isEmpty. Operand 9969 states and 13857 transitions. [2021-11-09 09:36:45,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2021-11-09 09:36:45,428 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:45,429 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:36:45,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 09:36:45,430 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:45,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:45,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1041363556, now seen corresponding path program 1 times [2021-11-09 09:36:45,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:45,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227387255] [2021-11-09 09:36:45,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:45,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:45,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:45,831 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-09 09:36:45,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:45,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227387255] [2021-11-09 09:36:45,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227387255] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:45,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:45,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:36:45,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360750612] [2021-11-09 09:36:45,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:36:45,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:45,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:36:45,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:36:45,835 INFO L87 Difference]: Start difference. First operand 9969 states and 13857 transitions. Second operand has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 2 states have internal predecessors, (518), 0 states have call successors, (0), 0 states 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 09:36:53,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:53,859 INFO L93 Difference]: Finished difference Result 26933 states and 38507 transitions. [2021-11-09 09:36:53,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:36:53,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 2 states have internal predecessors, (518), 0 states have call successors, (0), 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 593 [2021-11-09 09:36:53,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:53,900 INFO L225 Difference]: With dead ends: 26933 [2021-11-09 09:36:53,900 INFO L226 Difference]: Without dead ends: 18331 [2021-11-09 09:36:53,912 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 09:36:53,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18331 states. [2021-11-09 09:36:54,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18331 to 18329. [2021-11-09 09:36:54,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18329 states, 18328 states have (on average 1.378601047577477) internal successors, (25267), 18328 states have internal predecessors, (25267), 0 states have call successors, (0), 0 states 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 09:36:54,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18329 states to 18329 states and 25267 transitions. [2021-11-09 09:36:54,224 INFO L78 Accepts]: Start accepts. Automaton has 18329 states and 25267 transitions. Word has length 593 [2021-11-09 09:36:54,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:54,226 INFO L470 AbstractCegarLoop]: Abstraction has 18329 states and 25267 transitions. [2021-11-09 09:36:54,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 2 states have internal predecessors, (518), 0 states have call successors, (0), 0 states 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 09:36:54,226 INFO L276 IsEmpty]: Start isEmpty. Operand 18329 states and 25267 transitions. [2021-11-09 09:36:54,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2021-11-09 09:36:54,240 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:54,241 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:36:54,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 09:36:54,241 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:36:54,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:54,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1308389203, now seen corresponding path program 1 times [2021-11-09 09:36:54,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:54,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422235871] [2021-11-09 09:36:54,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:54,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:54,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:54,940 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 71 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:54,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:54,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422235871] [2021-11-09 09:36:54,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422235871] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:54,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290887721] [2021-11-09 09:36:54,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:54,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:54,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18817ea4-eff6-41d3-96c0-79849c11d0c9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:54,952 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18817ea4-eff6-41d3-96c0-79849c11d0c9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:54,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18817ea4-eff6-41d3-96c0-79849c11d0c9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:36:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:55,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 09:36:55,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:56,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290887721] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:56,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:36:56,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-09 09:36:56,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792500321] [2021-11-09 09:36:56,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:36:56,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:56,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:36:56,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:36:56,733 INFO L87 Difference]: Start difference. First operand 18329 states and 25267 transitions. Second operand has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states 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 09:37:03,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:03,748 INFO L93 Difference]: Finished difference Result 51670 states and 72287 transitions. [2021-11-09 09:37:03,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:37:03,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 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 607 [2021-11-09 09:37:03,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:03,823 INFO L225 Difference]: With dead ends: 51670 [2021-11-09 09:37:03,823 INFO L226 Difference]: Without dead ends: 34708 [2021-11-09 09:37:03,849 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 607 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:37:03,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34708 states. [2021-11-09 09:37:04,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34708 to 34708. [2021-11-09 09:37:04,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34708 states, 34707 states have (on average 1.2475005042210505) internal successors, (43297), 34707 states have internal predecessors, (43297), 0 states have call successors, (0), 0 states 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 09:37:04,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34708 states to 34708 states and 43297 transitions. [2021-11-09 09:37:04,569 INFO L78 Accepts]: Start accepts. Automaton has 34708 states and 43297 transitions. Word has length 607 [2021-11-09 09:37:04,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:04,570 INFO L470 AbstractCegarLoop]: Abstraction has 34708 states and 43297 transitions. [2021-11-09 09:37:04,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states 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 09:37:04,571 INFO L276 IsEmpty]: Start isEmpty. Operand 34708 states and 43297 transitions. [2021-11-09 09:37:04,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 630 [2021-11-09 09:37:04,577 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:04,578 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:37:04,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18817ea4-eff6-41d3-96c0-79849c11d0c9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:04,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18817ea4-eff6-41d3-96c0-79849c11d0c9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:04,794 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:04,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:04,795 INFO L85 PathProgramCache]: Analyzing trace with hash -636095440, now seen corresponding path program 1 times [2021-11-09 09:37:04,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:04,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697036969] [2021-11-09 09:37:04,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:04,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:04,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:05,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:05,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697036969] [2021-11-09 09:37:05,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697036969] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:37:05,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:37:05,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:37:05,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175373146] [2021-11-09 09:37:05,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:37:05,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:05,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:37:05,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:37:05,290 INFO L87 Difference]: Start difference. First operand 34708 states and 43297 transitions. Second operand has 5 states, 5 states have (on average 125.8) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states 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 09:37:16,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:16,434 INFO L93 Difference]: Finished difference Result 74910 states and 92504 transitions. [2021-11-09 09:37:16,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:37:16,435 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 125.8) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 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 629 [2021-11-09 09:37:16,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:16,501 INFO L225 Difference]: With dead ends: 74910 [2021-11-09 09:37:16,501 INFO L226 Difference]: Without dead ends: 41543 [2021-11-09 09:37:16,533 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:37:16,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41543 states. [2021-11-09 09:37:17,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41543 to 40175. [2021-11-09 09:37:17,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40175 states, 40174 states have (on average 1.2193209538507492) internal successors, (48985), 40174 states have internal predecessors, (48985), 0 states have call successors, (0), 0 states 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 09:37:17,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40175 states to 40175 states and 48985 transitions. [2021-11-09 09:37:17,121 INFO L78 Accepts]: Start accepts. Automaton has 40175 states and 48985 transitions. Word has length 629 [2021-11-09 09:37:17,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:17,122 INFO L470 AbstractCegarLoop]: Abstraction has 40175 states and 48985 transitions. [2021-11-09 09:37:17,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 125.8) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states 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 09:37:17,123 INFO L276 IsEmpty]: Start isEmpty. Operand 40175 states and 48985 transitions. [2021-11-09 09:37:17,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 823 [2021-11-09 09:37:17,132 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:17,134 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:37:17,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 09:37:17,134 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:17,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:17,135 INFO L85 PathProgramCache]: Analyzing trace with hash -149990662, now seen corresponding path program 1 times [2021-11-09 09:37:17,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:17,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34332931] [2021-11-09 09:37:17,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:17,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:17,549 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 276 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-11-09 09:37:17,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:17,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34332931] [2021-11-09 09:37:17,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34332931] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:37:17,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:37:17,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:37:17,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722756913] [2021-11-09 09:37:17,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:37:17,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:17,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:37:17,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:37:17,554 INFO L87 Difference]: Start difference. First operand 40175 states and 48985 transitions. Second operand has 4 states, 4 states have (on average 153.5) internal successors, (614), 4 states have internal predecessors, (614), 0 states have call successors, (0), 0 states 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 09:37:32,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:32,795 INFO L93 Difference]: Finished difference Result 144642 states and 178506 transitions. [2021-11-09 09:37:32,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:37:32,796 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 153.5) internal successors, (614), 4 states have internal predecessors, (614), 0 states have call successors, (0), 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 822 [2021-11-09 09:37:32,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:32,971 INFO L225 Difference]: With dead ends: 144642 [2021-11-09 09:37:32,971 INFO L226 Difference]: Without dead ends: 105834 [2021-11-09 09:37:33,017 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 09:37:33,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105834 states. [2021-11-09 09:37:34,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105834 to 97575. [2021-11-09 09:37:34,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97575 states, 97574 states have (on average 1.1812777994137782) internal successors, (115262), 97574 states have internal predecessors, (115262), 0 states have call successors, (0), 0 states 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 09:37:34,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97575 states to 97575 states and 115262 transitions. [2021-11-09 09:37:34,702 INFO L78 Accepts]: Start accepts. Automaton has 97575 states and 115262 transitions. Word has length 822 [2021-11-09 09:37:34,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:34,703 INFO L470 AbstractCegarLoop]: Abstraction has 97575 states and 115262 transitions. [2021-11-09 09:37:34,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.5) internal successors, (614), 4 states have internal predecessors, (614), 0 states have call successors, (0), 0 states 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 09:37:34,703 INFO L276 IsEmpty]: Start isEmpty. Operand 97575 states and 115262 transitions. [2021-11-09 09:37:34,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 899 [2021-11-09 09:37:34,719 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:34,720 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:37:34,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 09:37:34,721 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:34,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:34,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1158037052, now seen corresponding path program 1 times [2021-11-09 09:37:34,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:34,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145669447] [2021-11-09 09:37:34,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:34,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:34,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:35,650 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 386 proven. 313 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-09 09:37:35,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:35,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145669447] [2021-11-09 09:37:35,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145669447] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:35,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402977890] [2021-11-09 09:37:35,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:35,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:35,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18817ea4-eff6-41d3-96c0-79849c11d0c9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:35,657 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18817ea4-eff6-41d3-96c0-79849c11d0c9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:35,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18817ea4-eff6-41d3-96c0-79849c11d0c9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:37:36,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:36,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 09:37:36,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:38,333 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 337 proven. 0 refuted. 0 times theorem prover too weak. 398 trivial. 0 not checked. [2021-11-09 09:37:38,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402977890] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:37:38,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:37:38,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-09 09:37:38,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959405768] [2021-11-09 09:37:38,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:37:38,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:38,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:37:38,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:37:38,336 INFO L87 Difference]: Start difference. First operand 97575 states and 115262 transitions. Second operand has 3 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 0 states 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 09:37:47,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:47,100 INFO L93 Difference]: Finished difference Result 214265 states and 258278 transitions. [2021-11-09 09:37:47,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:37:47,100 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 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 898 [2021-11-09 09:37:47,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:47,273 INFO L225 Difference]: With dead ends: 214265 [2021-11-09 09:37:47,273 INFO L226 Difference]: Without dead ends: 130349 [2021-11-09 09:37:47,328 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 905 GetRequests, 899 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:37:47,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130349 states. [2021-11-09 09:37:49,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130349 to 122151. [2021-11-09 09:37:49,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122151 states, 122150 states have (on average 1.201620957838723) internal successors, (146778), 122150 states have internal predecessors, (146778), 0 states have call successors, (0), 0 states 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 09:37:49,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122151 states to 122151 states and 146778 transitions. [2021-11-09 09:37:49,580 INFO L78 Accepts]: Start accepts. Automaton has 122151 states and 146778 transitions. Word has length 898 [2021-11-09 09:37:49,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:49,581 INFO L470 AbstractCegarLoop]: Abstraction has 122151 states and 146778 transitions. [2021-11-09 09:37:49,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 0 states 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 09:37:49,581 INFO L276 IsEmpty]: Start isEmpty. Operand 122151 states and 146778 transitions. [2021-11-09 09:37:49,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 899 [2021-11-09 09:37:49,594 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:49,867 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:37:49,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18817ea4-eff6-41d3-96c0-79849c11d0c9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-09 09:37:50,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18817ea4-eff6-41d3-96c0-79849c11d0c9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-09 09:37:50,068 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:50,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:50,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1165820487, now seen corresponding path program 1 times [2021-11-09 09:37:50,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:50,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840567257] [2021-11-09 09:37:50,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:50,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:50,603 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 301 proven. 0 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2021-11-09 09:37:50,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:50,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840567257] [2021-11-09 09:37:50,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840567257] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:37:50,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:37:50,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:37:50,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865362397] [2021-11-09 09:37:50,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:37:50,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:50,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:37:50,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:37:50,608 INFO L87 Difference]: Start difference. First operand 122151 states and 146778 transitions. Second operand has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 09:37:59,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:59,502 INFO L93 Difference]: Finished difference Result 297607 states and 358320 transitions. [2021-11-09 09:37:59,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:37:59,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 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 898 [2021-11-09 09:37:59,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:59,713 INFO L225 Difference]: With dead ends: 297607 [2021-11-09 09:37:59,713 INFO L226 Difference]: Without dead ends: 176823 [2021-11-09 09:37:59,752 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 09:37:59,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176823 states. [2021-11-09 09:38:01,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176823 to 168554. [2021-11-09 09:38:01,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168554 states, 168553 states have (on average 1.2043867507549555) internal successors, (203003), 168553 states have internal predecessors, (203003), 0 states have call successors, (0), 0 states 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 09:38:02,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168554 states to 168554 states and 203003 transitions. [2021-11-09 09:38:02,438 INFO L78 Accepts]: Start accepts. Automaton has 168554 states and 203003 transitions. Word has length 898 [2021-11-09 09:38:02,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:02,439 INFO L470 AbstractCegarLoop]: Abstraction has 168554 states and 203003 transitions. [2021-11-09 09:38:02,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states 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 09:38:02,439 INFO L276 IsEmpty]: Start isEmpty. Operand 168554 states and 203003 transitions. [2021-11-09 09:38:02,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1022 [2021-11-09 09:38:02,475 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:02,503 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, 5, 5, 5, 5, 5, 5, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:38:02,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 09:38:02,504 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:38:02,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:02,505 INFO L85 PathProgramCache]: Analyzing trace with hash 2132130447, now seen corresponding path program 1 times [2021-11-09 09:38:02,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:02,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575171120] [2021-11-09 09:38:02,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:02,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:03,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 583 proven. 0 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-09 09:38:03,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:03,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575171120] [2021-11-09 09:38:03,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575171120] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:03,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:03,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:38:03,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688380635] [2021-11-09 09:38:03,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:38:03,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:03,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:38:03,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:38:03,077 INFO L87 Difference]: Start difference. First operand 168554 states and 203003 transitions. Second operand has 3 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 0 states have call successors, (0), 0 states 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 09:38:10,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:10,594 INFO L93 Difference]: Finished difference Result 357577 states and 434917 transitions. [2021-11-09 09:38:10,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:38:10,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 0 states have call successors, (0), 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 1021 [2021-11-09 09:38:10,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:10,863 INFO L225 Difference]: With dead ends: 357577 [2021-11-09 09:38:10,864 INFO L226 Difference]: Without dead ends: 198584 [2021-11-09 09:38:10,931 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 09:38:11,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198584 states. [2021-11-09 09:38:13,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198584 to 197211. [2021-11-09 09:38:13,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197211 states, 197210 states have (on average 1.1815982962324425) internal successors, (233023), 197210 states have internal predecessors, (233023), 0 states have call successors, (0), 0 states 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 09:38:13,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197211 states to 197211 states and 233023 transitions. [2021-11-09 09:38:13,923 INFO L78 Accepts]: Start accepts. Automaton has 197211 states and 233023 transitions. Word has length 1021 [2021-11-09 09:38:13,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:13,924 INFO L470 AbstractCegarLoop]: Abstraction has 197211 states and 233023 transitions. [2021-11-09 09:38:13,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 0 states have call successors, (0), 0 states 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 09:38:13,925 INFO L276 IsEmpty]: Start isEmpty. Operand 197211 states and 233023 transitions. [2021-11-09 09:38:13,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1022 [2021-11-09 09:38:13,941 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:13,942 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, 5, 5, 5, 5, 5, 5, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:38:13,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 09:38:13,943 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:38:13,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:13,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1561858641, now seen corresponding path program 1 times [2021-11-09 09:38:13,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:13,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365111800] [2021-11-09 09:38:13,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:13,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:15,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 741 proven. 0 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2021-11-09 09:38:15,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:15,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365111800] [2021-11-09 09:38:15,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365111800] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:15,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:15,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:38:15,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234315129] [2021-11-09 09:38:15,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:38:15,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:15,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:38:15,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:38:15,260 INFO L87 Difference]: Start difference. First operand 197211 states and 233023 transitions. Second operand has 3 states, 3 states have (on average 228.33333333333334) internal successors, (685), 3 states have internal predecessors, (685), 0 states have call successors, (0), 0 states 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 09:38:24,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:24,155 INFO L93 Difference]: Finished difference Result 460028 states and 543157 transitions. [2021-11-09 09:38:24,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:38:24,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 228.33333333333334) internal successors, (685), 3 states have internal predecessors, (685), 0 states have call successors, (0), 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 1021 [2021-11-09 09:38:24,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:24,471 INFO L225 Difference]: With dead ends: 460028 [2021-11-09 09:38:24,471 INFO L226 Difference]: Without dead ends: 264184 [2021-11-09 09:38:24,536 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:38:24,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264184 states. [2021-11-09 09:38:27,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264184 to 246345. [2021-11-09 09:38:27,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246345 states, 246344 states have (on average 1.1799719092001428) internal successors, (290679), 246344 states have internal predecessors, (290679), 0 states have call successors, (0), 0 states 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 09:38:28,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246345 states to 246345 states and 290679 transitions. [2021-11-09 09:38:28,324 INFO L78 Accepts]: Start accepts. Automaton has 246345 states and 290679 transitions. Word has length 1021 [2021-11-09 09:38:28,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:28,325 INFO L470 AbstractCegarLoop]: Abstraction has 246345 states and 290679 transitions. [2021-11-09 09:38:28,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.33333333333334) internal successors, (685), 3 states have internal predecessors, (685), 0 states have call successors, (0), 0 states 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 09:38:28,325 INFO L276 IsEmpty]: Start isEmpty. Operand 246345 states and 290679 transitions. [2021-11-09 09:38:28,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1046 [2021-11-09 09:38:28,339 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:28,340 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:38:28,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 09:38:28,340 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:38:28,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:28,341 INFO L85 PathProgramCache]: Analyzing trace with hash -456884136, now seen corresponding path program 1 times [2021-11-09 09:38:28,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:28,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197731050] [2021-11-09 09:38:28,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:28,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:29,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 704 proven. 313 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-09 09:38:29,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:29,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197731050] [2021-11-09 09:38:29,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197731050] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:29,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28027589] [2021-11-09 09:38:29,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:29,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:29,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18817ea4-eff6-41d3-96c0-79849c11d0c9/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:38:29,867 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18817ea4-eff6-41d3-96c0-79849c11d0c9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:38:29,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18817ea4-eff6-41d3-96c0-79849c11d0c9/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:38:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:30,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 1224 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 09:38:30,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:38:32,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 910 trivial. 0 not checked. [2021-11-09 09:38:32,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28027589] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:32,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:38:32,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-09 09:38:32,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446546907] [2021-11-09 09:38:32,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:38:32,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:32,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:38:32,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:38:32,644 INFO L87 Difference]: Start difference. First operand 246345 states and 290679 transitions. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states 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 09:38:41,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:41,143 INFO L93 Difference]: Finished difference Result 483132 states and 571448 transitions. [2021-11-09 09:38:41,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:38:41,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 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 1045 [2021-11-09 09:38:41,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:41,579 INFO L225 Difference]: With dead ends: 483132 [2021-11-09 09:38:41,579 INFO L226 Difference]: Without dead ends: 254540 [2021-11-09 09:38:41,735 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1052 GetRequests, 1046 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:38:42,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254540 states.