./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label24.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_7b99b548-e945-421e-8daf-252a960550cb/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b99b548-e945-421e-8daf-252a960550cb/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_7b99b548-e945-421e-8daf-252a960550cb/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b99b548-e945-421e-8daf-252a960550cb/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label24.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b99b548-e945-421e-8daf-252a960550cb/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_7b99b548-e945-421e-8daf-252a960550cb/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 24f3f57511ed23e7031a40e25f3e5030217322872173b78a17d5462480e8351a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:35:23,012 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:35:23,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:35:23,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:35:23,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:35:23,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:35:23,087 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:35:23,091 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:35:23,094 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:35:23,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:35:23,098 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:35:23,100 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:35:23,101 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:35:23,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:35:23,105 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:35:23,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:35:23,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:35:23,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:35:23,113 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:35:23,117 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:35:23,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:35:23,122 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:35:23,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:35:23,126 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:35:23,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:35:23,133 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:35:23,134 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:35:23,135 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:35:23,136 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:35:23,138 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:35:23,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:35:23,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:35:23,141 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:35:23,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:35:23,145 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:35:23,147 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:35:23,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:35:23,150 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:35:23,151 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:35:23,153 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:35:23,154 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:35:23,155 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b99b548-e945-421e-8daf-252a960550cb/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 10:35:23,214 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:35:23,215 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:35:23,215 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:35:23,216 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:35:23,218 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:35:23,218 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:35:23,218 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:35:23,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:35:23,219 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:35:23,219 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:35:23,221 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:35:23,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:35:23,222 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 10:35:23,222 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:35:23,222 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 10:35:23,223 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:35:23,223 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 10:35:23,223 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:35:23,224 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 10:35:23,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:35:23,224 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:35:23,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:35:23,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:35:23,225 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:35:23,226 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:35:23,226 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 10:35:23,226 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 10:35:23,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 10:35:23,227 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 10:35:23,229 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 10:35:23,230 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 10:35:23,230 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:35:23,230 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_7b99b548-e945-421e-8daf-252a960550cb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b99b548-e945-421e-8daf-252a960550cb/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24f3f57511ed23e7031a40e25f3e5030217322872173b78a17d5462480e8351a [2021-11-09 10:35:23,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:35:23,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:35:23,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:35:23,613 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:35:23,613 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:35:23,615 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b99b548-e945-421e-8daf-252a960550cb/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/eca-rers2012/Problem12_label24.c [2021-11-09 10:35:23,740 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b99b548-e945-421e-8daf-252a960550cb/bin/uautomizer-IVEQpCNsaX/data/fb8f25e24/a8d4f1a574a14ebd8a116f7117255c65/FLAGad0c80ff2 [2021-11-09 10:35:24,863 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:35:24,865 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b99b548-e945-421e-8daf-252a960550cb/sv-benchmarks/c/eca-rers2012/Problem12_label24.c [2021-11-09 10:35:24,910 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b99b548-e945-421e-8daf-252a960550cb/bin/uautomizer-IVEQpCNsaX/data/fb8f25e24/a8d4f1a574a14ebd8a116f7117255c65/FLAGad0c80ff2 [2021-11-09 10:35:25,271 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b99b548-e945-421e-8daf-252a960550cb/bin/uautomizer-IVEQpCNsaX/data/fb8f25e24/a8d4f1a574a14ebd8a116f7117255c65 [2021-11-09 10:35:25,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:35:25,281 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 10:35:25,284 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:35:25,285 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:35:25,290 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:35:25,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:35:25" (1/1) ... [2021-11-09 10:35:25,293 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6024dc74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:25, skipping insertion in model container [2021-11-09 10:35:25,293 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:35:25" (1/1) ... [2021-11-09 10:35:25,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:35:25,487 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:35:25,863 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_7b99b548-e945-421e-8daf-252a960550cb/sv-benchmarks/c/eca-rers2012/Problem12_label24.c[5810,5823] [2021-11-09 10:35:27,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:35:27,391 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:35:27,452 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_7b99b548-e945-421e-8daf-252a960550cb/sv-benchmarks/c/eca-rers2012/Problem12_label24.c[5810,5823] [2021-11-09 10:35:28,270 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:35:28,304 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:35:28,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:28 WrapperNode [2021-11-09 10:35:28,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:35:28,308 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 10:35:28,308 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 10:35:28,308 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 10:35:28,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:28" (1/1) ... [2021-11-09 10:35:28,406 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:28" (1/1) ... [2021-11-09 10:35:28,880 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 10:35:28,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:35:28,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:35:28,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:35:28,964 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:28" (1/1) ... [2021-11-09 10:35:28,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:28" (1/1) ... [2021-11-09 10:35:29,097 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:28" (1/1) ... [2021-11-09 10:35:29,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:28" (1/1) ... [2021-11-09 10:35:29,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:28" (1/1) ... [2021-11-09 10:35:29,575 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:28" (1/1) ... [2021-11-09 10:35:29,698 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:28" (1/1) ... [2021-11-09 10:35:29,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:35:29,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:35:29,866 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:35:29,867 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:35:29,869 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:28" (1/1) ... [2021-11-09 10:35:29,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:35:29,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b99b548-e945-421e-8daf-252a960550cb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:35:29,910 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b99b548-e945-421e-8daf-252a960550cb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:35:29,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b99b548-e945-421e-8daf-252a960550cb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:35:29,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 10:35:29,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:35:29,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:35:29,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:35:35,961 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:35:35,962 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-09 10:35:35,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:35:35 BoogieIcfgContainer [2021-11-09 10:35:35,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:35:35,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:35:35,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:35:35,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:35:35,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:35:25" (1/3) ... [2021-11-09 10:35:35,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b82be3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:35:35, skipping insertion in model container [2021-11-09 10:35:35,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:28" (2/3) ... [2021-11-09 10:35:35,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b82be3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:35:35, skipping insertion in model container [2021-11-09 10:35:35,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:35:35" (3/3) ... [2021-11-09 10:35:35,981 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label24.c [2021-11-09 10:35:35,993 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:35:35,993 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 10:35:36,092 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:35:36,104 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 10:35:36,104 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 10:35:36,167 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states 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 10:35:36,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 10:35:36,184 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:35:36,185 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:35:36,185 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:35:36,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:35:36,200 INFO L85 PathProgramCache]: Analyzing trace with hash 291089130, now seen corresponding path program 1 times [2021-11-09 10:35:36,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:35:36,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477429083] [2021-11-09 10:35:36,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:35:36,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:35:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:35:36,602 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 10:35:36,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:35:36,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477429083] [2021-11-09 10:35:36,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477429083] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:35:36,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:35:36,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 10:35:36,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792470110] [2021-11-09 10:35:36,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:35:36,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:35:36,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:35:36,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:35:36,647 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 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 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 10:35:42,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:35:42,213 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2021-11-09 10:35:42,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:35:42,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-09 10:35:42,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:35:42,251 INFO L225 Difference]: With dead ends: 2388 [2021-11-09 10:35:42,252 INFO L226 Difference]: Without dead ends: 1506 [2021-11-09 10:35:42,259 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 10:35:42,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-11-09 10:35:42,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2021-11-09 10:35:42,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.8458471760797341) internal successors, (2778), 1505 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states 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 10:35:42,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2778 transitions. [2021-11-09 10:35:42,410 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2778 transitions. Word has length 46 [2021-11-09 10:35:42,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:35:42,411 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 2778 transitions. [2021-11-09 10:35:42,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 10:35:42,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2778 transitions. [2021-11-09 10:35:42,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-09 10:35:42,418 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:35:42,419 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:35:42,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 10:35:42,419 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:35:42,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:35:42,420 INFO L85 PathProgramCache]: Analyzing trace with hash -715150946, now seen corresponding path program 1 times [2021-11-09 10:35:42,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:35:42,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62941644] [2021-11-09 10:35:42,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:35:42,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:35:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:35:42,633 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:35:42,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:35:42,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62941644] [2021-11-09 10:35:42,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62941644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:35:42,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:35:42,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 10:35:42,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957126167] [2021-11-09 10:35:42,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:35:42,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:35:42,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:35:42,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:35:42,640 INFO L87 Difference]: Start difference. First operand 1506 states and 2778 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:35:47,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:35:47,468 INFO L93 Difference]: Finished difference Result 3761 states and 6893 transitions. [2021-11-09 10:35:47,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:35:47,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-11-09 10:35:47,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:35:47,489 INFO L225 Difference]: With dead ends: 3761 [2021-11-09 10:35:47,490 INFO L226 Difference]: Without dead ends: 2257 [2021-11-09 10:35:47,493 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 10:35:47,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-11-09 10:35:47,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2257. [2021-11-09 10:35:47,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 2256 states have (on average 1.4419326241134751) internal successors, (3253), 2256 states have internal predecessors, (3253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:35:47,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3253 transitions. [2021-11-09 10:35:47,583 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3253 transitions. Word has length 115 [2021-11-09 10:35:47,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:35:47,587 INFO L470 AbstractCegarLoop]: Abstraction has 2257 states and 3253 transitions. [2021-11-09 10:35:47,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:35:47,587 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3253 transitions. [2021-11-09 10:35:47,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-09 10:35:47,602 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:35:47,603 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:35:47,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 10:35:47,605 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:35:47,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:35:47,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1461296935, now seen corresponding path program 1 times [2021-11-09 10:35:47,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:35:47,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086737724] [2021-11-09 10:35:47,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:35:47,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:35:47,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:35:47,877 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:35:47,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:35:47,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086737724] [2021-11-09 10:35:47,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086737724] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:35:47,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:35:47,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:35:47,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770723828] [2021-11-09 10:35:47,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:35:47,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:35:47,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:35:47,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:35:47,896 INFO L87 Difference]: Start difference. First operand 2257 states and 3253 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:35:54,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:35:54,185 INFO L93 Difference]: Finished difference Result 6804 states and 9792 transitions. [2021-11-09 10:35:54,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:35:54,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-09 10:35:54,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:35:54,223 INFO L225 Difference]: With dead ends: 6804 [2021-11-09 10:35:54,223 INFO L226 Difference]: Without dead ends: 4512 [2021-11-09 10:35:54,227 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 10:35:54,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4512 states. [2021-11-09 10:35:54,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4512 to 4510. [2021-11-09 10:35:54,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4510 states, 4509 states have (on average 1.228210246174318) internal successors, (5538), 4509 states have internal predecessors, (5538), 0 states have call successors, (0), 0 states 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 10:35:54,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 5538 transitions. [2021-11-09 10:35:54,374 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 5538 transitions. Word has length 117 [2021-11-09 10:35:54,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:35:54,375 INFO L470 AbstractCegarLoop]: Abstraction has 4510 states and 5538 transitions. [2021-11-09 10:35:54,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:35:54,376 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 5538 transitions. [2021-11-09 10:35:54,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-09 10:35:54,380 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:35:54,381 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:35:54,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 10:35:54,381 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:35:54,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:35:54,382 INFO L85 PathProgramCache]: Analyzing trace with hash -618289703, now seen corresponding path program 1 times [2021-11-09 10:35:54,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:35:54,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536980232] [2021-11-09 10:35:54,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:35:54,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:35:54,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:35:54,759 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-09 10:35:54,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:35:54,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536980232] [2021-11-09 10:35:54,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536980232] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:35:54,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:35:54,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:35:54,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818497635] [2021-11-09 10:35:54,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:35:54,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:35:54,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:35:54,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:35:54,770 INFO L87 Difference]: Start difference. First operand 4510 states and 5538 transitions. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:35:59,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:35:59,215 INFO L93 Difference]: Finished difference Result 11310 states and 14294 transitions. [2021-11-09 10:35:59,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:35:59,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 258 [2021-11-09 10:35:59,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:35:59,254 INFO L225 Difference]: With dead ends: 11310 [2021-11-09 10:35:59,255 INFO L226 Difference]: Without dead ends: 6765 [2021-11-09 10:35:59,262 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 10:35:59,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6765 states. [2021-11-09 10:35:59,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6765 to 6763. [2021-11-09 10:35:59,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 6762 states have (on average 1.199349304939367) internal successors, (8110), 6762 states have internal predecessors, (8110), 0 states have call successors, (0), 0 states 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 10:35:59,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 8110 transitions. [2021-11-09 10:35:59,464 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 8110 transitions. Word has length 258 [2021-11-09 10:35:59,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:35:59,466 INFO L470 AbstractCegarLoop]: Abstraction has 6763 states and 8110 transitions. [2021-11-09 10:35:59,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:35:59,466 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 8110 transitions. [2021-11-09 10:35:59,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-09 10:35:59,475 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:35:59,476 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2021-11-09 10:35:59,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 10:35:59,476 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:35:59,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:35:59,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1970090326, now seen corresponding path program 1 times [2021-11-09 10:35:59,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:35:59,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554701251] [2021-11-09 10:35:59,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:35:59,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:35:59,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:35:59,733 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-09 10:35:59,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:35:59,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554701251] [2021-11-09 10:35:59,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554701251] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:35:59,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:35:59,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:35:59,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226874848] [2021-11-09 10:35:59,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:35:59,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:35:59,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:35:59,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:35:59,739 INFO L87 Difference]: Start difference. First operand 6763 states and 8110 transitions. Second operand has 4 states, 4 states have (on average 54.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states 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 10:36:06,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:36:06,003 INFO L93 Difference]: Finished difference Result 19534 states and 23543 transitions. [2021-11-09 10:36:06,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:36:06,014 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 259 [2021-11-09 10:36:06,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:36:06,098 INFO L225 Difference]: With dead ends: 19534 [2021-11-09 10:36:06,098 INFO L226 Difference]: Without dead ends: 12773 [2021-11-09 10:36:06,109 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 10:36:06,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12773 states. [2021-11-09 10:36:06,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12773 to 12020. [2021-11-09 10:36:06,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12020 states, 12019 states have (on average 1.138031450203844) internal successors, (13678), 12019 states have internal predecessors, (13678), 0 states have call successors, (0), 0 states 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 10:36:06,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12020 states to 12020 states and 13678 transitions. [2021-11-09 10:36:06,419 INFO L78 Accepts]: Start accepts. Automaton has 12020 states and 13678 transitions. Word has length 259 [2021-11-09 10:36:06,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:36:06,420 INFO L470 AbstractCegarLoop]: Abstraction has 12020 states and 13678 transitions. [2021-11-09 10:36:06,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states 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 10:36:06,421 INFO L276 IsEmpty]: Start isEmpty. Operand 12020 states and 13678 transitions. [2021-11-09 10:36:06,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2021-11-09 10:36:06,430 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:36:06,431 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-09 10:36:06,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 10:36:06,432 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:36:06,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:36:06,432 INFO L85 PathProgramCache]: Analyzing trace with hash 585528210, now seen corresponding path program 1 times [2021-11-09 10:36:06,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:36:06,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180704087] [2021-11-09 10:36:06,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:36:06,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:36:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:36:06,607 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 308 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-09 10:36:06,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:36:06,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180704087] [2021-11-09 10:36:06,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180704087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:36:06,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:36:06,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:36:06,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109993184] [2021-11-09 10:36:06,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:36:06,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:36:06,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:36:06,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:36:06,613 INFO L87 Difference]: Start difference. First operand 12020 states and 13678 transitions. Second operand has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states 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 10:36:11,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:36:11,298 INFO L93 Difference]: Finished difference Result 33050 states and 37997 transitions. [2021-11-09 10:36:11,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:36:11,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 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 341 [2021-11-09 10:36:11,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:36:11,524 INFO L225 Difference]: With dead ends: 33050 [2021-11-09 10:36:11,525 INFO L226 Difference]: Without dead ends: 21032 [2021-11-09 10:36:11,538 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 10:36:11,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21032 states. [2021-11-09 10:36:11,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21032 to 18779. [2021-11-09 10:36:11,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18779 states, 18778 states have (on average 1.1468740014911065) internal successors, (21536), 18778 states have internal predecessors, (21536), 0 states have call successors, (0), 0 states 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 10:36:11,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18779 states to 18779 states and 21536 transitions. [2021-11-09 10:36:11,939 INFO L78 Accepts]: Start accepts. Automaton has 18779 states and 21536 transitions. Word has length 341 [2021-11-09 10:36:11,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:36:11,940 INFO L470 AbstractCegarLoop]: Abstraction has 18779 states and 21536 transitions. [2021-11-09 10:36:11,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states 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 10:36:11,942 INFO L276 IsEmpty]: Start isEmpty. Operand 18779 states and 21536 transitions. [2021-11-09 10:36:11,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2021-11-09 10:36:11,952 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:36:11,953 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-09 10:36:11,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 10:36:11,953 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:36:11,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:36:11,954 INFO L85 PathProgramCache]: Analyzing trace with hash 330038920, now seen corresponding path program 1 times [2021-11-09 10:36:11,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:36:11,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811510221] [2021-11-09 10:36:11,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:36:11,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:36:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:36:12,228 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 268 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-09 10:36:12,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:36:12,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811510221] [2021-11-09 10:36:12,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811510221] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:36:12,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:36:12,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:36:12,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862713984] [2021-11-09 10:36:12,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:36:12,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:36:12,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:36:12,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:36:12,233 INFO L87 Difference]: Start difference. First operand 18779 states and 21536 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states 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 10:36:16,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:36:16,631 INFO L93 Difference]: Finished difference Result 45817 states and 53208 transitions. [2021-11-09 10:36:16,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:36:16,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 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 345 [2021-11-09 10:36:16,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:36:16,706 INFO L225 Difference]: With dead ends: 45817 [2021-11-09 10:36:16,706 INFO L226 Difference]: Without dead ends: 27040 [2021-11-09 10:36:16,730 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 10:36:16,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27040 states. [2021-11-09 10:36:17,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27040 to 27040. [2021-11-09 10:36:17,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27040 states, 27039 states have (on average 1.1359147897481416) internal successors, (30714), 27039 states have internal predecessors, (30714), 0 states have call successors, (0), 0 states 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 10:36:17,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27040 states to 27040 states and 30714 transitions. [2021-11-09 10:36:17,371 INFO L78 Accepts]: Start accepts. Automaton has 27040 states and 30714 transitions. Word has length 345 [2021-11-09 10:36:17,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:36:17,372 INFO L470 AbstractCegarLoop]: Abstraction has 27040 states and 30714 transitions. [2021-11-09 10:36:17,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states 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 10:36:17,372 INFO L276 IsEmpty]: Start isEmpty. Operand 27040 states and 30714 transitions. [2021-11-09 10:36:17,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2021-11-09 10:36:17,385 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:36:17,386 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:36:17,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 10:36:17,386 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:36:17,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:36:17,387 INFO L85 PathProgramCache]: Analyzing trace with hash -752967464, now seen corresponding path program 1 times [2021-11-09 10:36:17,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:36:17,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065146655] [2021-11-09 10:36:17,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:36:17,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:36:17,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:36:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-09 10:36:17,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:36:17,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065146655] [2021-11-09 10:36:17,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065146655] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:36:17,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:36:17,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:36:17,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521054993] [2021-11-09 10:36:17,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:36:17,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:36:17,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:36:17,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:36:17,629 INFO L87 Difference]: Start difference. First operand 27040 states and 30714 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states 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 10:36:21,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:36:21,980 INFO L93 Difference]: Finished difference Result 76608 states and 87414 transitions. [2021-11-09 10:36:21,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:36:21,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 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 377 [2021-11-09 10:36:21,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:36:22,100 INFO L225 Difference]: With dead ends: 76608 [2021-11-09 10:36:22,101 INFO L226 Difference]: Without dead ends: 46566 [2021-11-09 10:36:22,131 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 10:36:22,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46566 states. [2021-11-09 10:36:22,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46566 to 45064. [2021-11-09 10:36:22,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45064 states, 45063 states have (on average 1.1051638816767637) internal successors, (49802), 45063 states have internal predecessors, (49802), 0 states have call successors, (0), 0 states 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 10:36:22,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45064 states to 45064 states and 49802 transitions. [2021-11-09 10:36:22,964 INFO L78 Accepts]: Start accepts. Automaton has 45064 states and 49802 transitions. Word has length 377 [2021-11-09 10:36:22,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:36:22,966 INFO L470 AbstractCegarLoop]: Abstraction has 45064 states and 49802 transitions. [2021-11-09 10:36:22,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states 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 10:36:22,966 INFO L276 IsEmpty]: Start isEmpty. Operand 45064 states and 49802 transitions. [2021-11-09 10:36:22,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2021-11-09 10:36:22,980 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:36:22,981 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:36:22,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 10:36:22,982 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:36:22,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:36:22,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1966451662, now seen corresponding path program 1 times [2021-11-09 10:36:22,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:36:22,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789571684] [2021-11-09 10:36:22,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:36:22,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:36:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:36:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 323 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-09 10:36:23,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:36:23,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789571684] [2021-11-09 10:36:23,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789571684] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:36:23,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:36:23,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:36:23,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494094503] [2021-11-09 10:36:23,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:36:23,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:36:23,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:36:23,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:36:23,201 INFO L87 Difference]: Start difference. First operand 45064 states and 49802 transitions. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states 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 10:36:27,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:36:27,448 INFO L93 Difference]: Finished difference Result 102893 states and 115227 transitions. [2021-11-09 10:36:27,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:36:27,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 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 384 [2021-11-09 10:36:27,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:36:27,527 INFO L225 Difference]: With dead ends: 102893 [2021-11-09 10:36:27,528 INFO L226 Difference]: Without dead ends: 57831 [2021-11-09 10:36:27,556 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 10:36:27,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57831 states. [2021-11-09 10:36:28,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57831 to 56329. [2021-11-09 10:36:28,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56329 states, 56328 states have (on average 1.1012640249964494) internal successors, (62032), 56328 states have internal predecessors, (62032), 0 states have call successors, (0), 0 states 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 10:36:28,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56329 states to 56329 states and 62032 transitions. [2021-11-09 10:36:28,450 INFO L78 Accepts]: Start accepts. Automaton has 56329 states and 62032 transitions. Word has length 384 [2021-11-09 10:36:28,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:36:28,451 INFO L470 AbstractCegarLoop]: Abstraction has 56329 states and 62032 transitions. [2021-11-09 10:36:28,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states 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 10:36:28,452 INFO L276 IsEmpty]: Start isEmpty. Operand 56329 states and 62032 transitions. [2021-11-09 10:36:28,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2021-11-09 10:36:28,467 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:36:28,467 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:36:28,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 10:36:28,468 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:36:28,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:36:28,469 INFO L85 PathProgramCache]: Analyzing trace with hash -814398153, now seen corresponding path program 1 times [2021-11-09 10:36:28,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:36:28,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775051224] [2021-11-09 10:36:28,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:36:28,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:36:28,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:36:28,664 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 326 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-09 10:36:28,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:36:28,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775051224] [2021-11-09 10:36:28,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775051224] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:36:28,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:36:28,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:36:28,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168267507] [2021-11-09 10:36:28,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:36:28,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:36:28,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:36:28,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:36:28,668 INFO L87 Difference]: Start difference. First operand 56329 states and 62032 transitions. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states 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 10:36:32,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:36:32,484 INFO L93 Difference]: Finished difference Result 123921 states and 137944 transitions. [2021-11-09 10:36:32,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:36:32,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 406 [2021-11-09 10:36:32,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:36:32,561 INFO L225 Difference]: With dead ends: 123921 [2021-11-09 10:36:32,561 INFO L226 Difference]: Without dead ends: 67594 [2021-11-09 10:36:32,589 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 10:36:32,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67594 states. [2021-11-09 10:36:33,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67594 to 67594. [2021-11-09 10:36:33,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67594 states, 67593 states have (on average 1.1136064385365347) internal successors, (75272), 67593 states have internal predecessors, (75272), 0 states have call successors, (0), 0 states 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 10:36:33,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67594 states to 67594 states and 75272 transitions. [2021-11-09 10:36:33,796 INFO L78 Accepts]: Start accepts. Automaton has 67594 states and 75272 transitions. Word has length 406 [2021-11-09 10:36:33,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:36:33,798 INFO L470 AbstractCegarLoop]: Abstraction has 67594 states and 75272 transitions. [2021-11-09 10:36:33,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states 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 10:36:33,799 INFO L276 IsEmpty]: Start isEmpty. Operand 67594 states and 75272 transitions. [2021-11-09 10:36:33,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2021-11-09 10:36:33,819 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:36:33,820 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:36:33,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 10:36:33,821 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:36:33,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:36:33,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1327386509, now seen corresponding path program 1 times [2021-11-09 10:36:33,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:36:33,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053000016] [2021-11-09 10:36:33,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:36:33,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:36:33,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:36:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 576 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-09 10:36:34,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:36:34,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053000016] [2021-11-09 10:36:34,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053000016] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:36:34,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:36:34,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:36:34,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142436027] [2021-11-09 10:36:34,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:36:34,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:36:34,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:36:34,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:36:34,192 INFO L87 Difference]: Start difference. First operand 67594 states and 75272 transitions. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states 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 10:36:38,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:36:38,028 INFO L93 Difference]: Finished difference Result 161471 states and 180888 transitions. [2021-11-09 10:36:38,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:36:38,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 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 467 [2021-11-09 10:36:38,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:36:38,157 INFO L225 Difference]: With dead ends: 161471 [2021-11-09 10:36:38,158 INFO L226 Difference]: Without dead ends: 93879 [2021-11-09 10:36:38,335 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 10:36:38,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93879 states. [2021-11-09 10:36:39,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93879 to 91626. [2021-11-09 10:36:39,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91626 states, 91625 states have (on average 1.1128840381991814) internal successors, (101968), 91625 states have internal predecessors, (101968), 0 states have call successors, (0), 0 states 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 10:36:39,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91626 states to 91626 states and 101968 transitions. [2021-11-09 10:36:39,638 INFO L78 Accepts]: Start accepts. Automaton has 91626 states and 101968 transitions. Word has length 467 [2021-11-09 10:36:39,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:36:39,638 INFO L470 AbstractCegarLoop]: Abstraction has 91626 states and 101968 transitions. [2021-11-09 10:36:39,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states 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 10:36:39,639 INFO L276 IsEmpty]: Start isEmpty. Operand 91626 states and 101968 transitions. [2021-11-09 10:36:39,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2021-11-09 10:36:39,655 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:36:39,656 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:36:39,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 10:36:39,657 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:36:39,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:36:39,657 INFO L85 PathProgramCache]: Analyzing trace with hash -628998444, now seen corresponding path program 1 times [2021-11-09 10:36:39,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:36:39,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507721414] [2021-11-09 10:36:39,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:36:39,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:36:40,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:36:40,307 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 420 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:36:40,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:36:40,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507721414] [2021-11-09 10:36:40,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507721414] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:36:40,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692811318] [2021-11-09 10:36:40,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:36:40,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:36:40,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b99b548-e945-421e-8daf-252a960550cb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:36:40,314 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b99b548-e945-421e-8daf-252a960550cb/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:36:40,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b99b548-e945-421e-8daf-252a960550cb/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 10:36:40,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:36:40,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:36:40,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:36:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-11-09 10:36:42,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692811318] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:36:42,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:36:42,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-11-09 10:36:42,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768300849] [2021-11-09 10:36:42,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:36:42,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:36:42,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:36:42,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:36:42,369 INFO L87 Difference]: Start difference. First operand 91626 states and 101968 transitions. Second operand has 4 states, 4 states have (on average 55.5) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states 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 10:36:49,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:36:49,371 INFO L93 Difference]: Finished difference Result 278629 states and 311412 transitions. [2021-11-09 10:36:49,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:36:49,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 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 481 [2021-11-09 10:36:49,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:36:49,623 INFO L225 Difference]: With dead ends: 278629 [2021-11-09 10:36:49,623 INFO L226 Difference]: Without dead ends: 187005 [2021-11-09 10:36:49,677 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:36:49,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187005 states. [2021-11-09 10:36:52,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187005 to 185501. [2021-11-09 10:36:52,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185501 states, 185500 states have (on average 1.115822102425876) internal successors, (206985), 185500 states have internal predecessors, (206985), 0 states have call successors, (0), 0 states 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 10:36:52,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185501 states to 185501 states and 206985 transitions. [2021-11-09 10:36:52,881 INFO L78 Accepts]: Start accepts. Automaton has 185501 states and 206985 transitions. Word has length 481 [2021-11-09 10:36:52,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:36:52,883 INFO L470 AbstractCegarLoop]: Abstraction has 185501 states and 206985 transitions. [2021-11-09 10:36:52,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states 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 10:36:52,883 INFO L276 IsEmpty]: Start isEmpty. Operand 185501 states and 206985 transitions. [2021-11-09 10:36:52,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2021-11-09 10:36:52,968 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:36:52,969 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-09 10:36:53,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b99b548-e945-421e-8daf-252a960550cb/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 10:36:53,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b99b548-e945-421e-8daf-252a960550cb/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:36:53,170 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:36:53,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:36:53,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1232615553, now seen corresponding path program 1 times [2021-11-09 10:36:53,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:36:53,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912685250] [2021-11-09 10:36:53,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:36:53,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:36:53,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:36:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 405 proven. 108 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2021-11-09 10:36:53,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:36:53,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912685250] [2021-11-09 10:36:53,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912685250] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:36:53,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998974151] [2021-11-09 10:36:53,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:36:53,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:36:53,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b99b548-e945-421e-8daf-252a960550cb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:36:53,524 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b99b548-e945-421e-8daf-252a960550cb/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:36:53,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b99b548-e945-421e-8daf-252a960550cb/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 10:36:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:36:53,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 10:36:53,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:36:55,039 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 449 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-09 10:36:55,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998974151] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:36:55,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:36:55,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-09 10:36:55,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467204774] [2021-11-09 10:36:55,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:36:55,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:36:55,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:36:55,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:36:55,042 INFO L87 Difference]: Start difference. First operand 185501 states and 206985 transitions. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states 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 10:36:59,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:36:59,972 INFO L93 Difference]: Finished difference Result 371000 states and 413968 transitions. [2021-11-09 10:36:59,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:36:59,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 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 527 [2021-11-09 10:36:59,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:37:00,233 INFO L225 Difference]: With dead ends: 371000 [2021-11-09 10:37:00,233 INFO L226 Difference]: Without dead ends: 185501 [2021-11-09 10:37:00,316 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:37:00,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185501 states. [2021-11-09 10:37:02,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185501 to 178742. [2021-11-09 10:37:03,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178742 states, 178741 states have (on average 1.0787060607247358) internal successors, (192809), 178741 states have internal predecessors, (192809), 0 states have call successors, (0), 0 states 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 10:37:03,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178742 states to 178742 states and 192809 transitions. [2021-11-09 10:37:03,487 INFO L78 Accepts]: Start accepts. Automaton has 178742 states and 192809 transitions. Word has length 527 [2021-11-09 10:37:03,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:37:03,488 INFO L470 AbstractCegarLoop]: Abstraction has 178742 states and 192809 transitions. [2021-11-09 10:37:03,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states 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 10:37:03,488 INFO L276 IsEmpty]: Start isEmpty. Operand 178742 states and 192809 transitions. [2021-11-09 10:37:03,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2021-11-09 10:37:03,537 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:37:03,538 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-09 10:37:03,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b99b548-e945-421e-8daf-252a960550cb/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 10:37:03,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b99b548-e945-421e-8daf-252a960550cb/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 10:37:03,752 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:37:03,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:37:03,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1327579866, now seen corresponding path program 1 times [2021-11-09 10:37:03,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:37:03,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099329790] [2021-11-09 10:37:03,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:37:03,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:37:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:37:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 640 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-09 10:37:04,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:37:04,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099329790] [2021-11-09 10:37:04,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099329790] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:37:04,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:37:04,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:37:04,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869295936] [2021-11-09 10:37:04,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:37:04,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:37:04,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:37:04,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:37:04,084 INFO L87 Difference]: Start difference. First operand 178742 states and 192809 transitions. Second operand has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states 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 10:37:10,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:37:10,122 INFO L93 Difference]: Finished difference Result 461120 states and 499585 transitions. [2021-11-09 10:37:10,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:37:10,123 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 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 616 [2021-11-09 10:37:10,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:37:10,622 INFO L225 Difference]: With dead ends: 461120 [2021-11-09 10:37:10,622 INFO L226 Difference]: Without dead ends: 282380 [2021-11-09 10:37:10,715 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 10:37:10,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282380 states. [2021-11-09 10:37:15,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282380 to 278625. [2021-11-09 10:37:15,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278625 states, 278624 states have (on average 1.072474015160216) internal successors, (298817), 278624 states have internal predecessors, (298817), 0 states have call successors, (0), 0 states 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 10:37:15,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278625 states to 278625 states and 298817 transitions. [2021-11-09 10:37:15,900 INFO L78 Accepts]: Start accepts. Automaton has 278625 states and 298817 transitions. Word has length 616 [2021-11-09 10:37:15,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:37:15,901 INFO L470 AbstractCegarLoop]: Abstraction has 278625 states and 298817 transitions. [2021-11-09 10:37:15,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states 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 10:37:15,901 INFO L276 IsEmpty]: Start isEmpty. Operand 278625 states and 298817 transitions. [2021-11-09 10:37:16,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 619 [2021-11-09 10:37:16,819 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:37:16,820 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:37:16,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 10:37:16,821 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:37:16,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:37:16,821 INFO L85 PathProgramCache]: Analyzing trace with hash -242892076, now seen corresponding path program 1 times [2021-11-09 10:37:16,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:37:16,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261876078] [2021-11-09 10:37:16,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:37:16,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:37:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:37:17,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 853 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-11-09 10:37:17,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:37:17,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261876078] [2021-11-09 10:37:17,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261876078] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:37:17,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:37:17,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:37:17,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229793082] [2021-11-09 10:37:17,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:37:17,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:37:17,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:37:17,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:37:17,298 INFO L87 Difference]: Start difference. First operand 278625 states and 298817 transitions. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states 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 10:37:24,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:37:24,001 INFO L93 Difference]: Finished difference Result 630846 states and 678424 transitions. [2021-11-09 10:37:24,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:37:24,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 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 618 [2021-11-09 10:37:24,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:37:25,358 INFO L225 Difference]: With dead ends: 630846 [2021-11-09 10:37:25,359 INFO L226 Difference]: Without dead ends: 352223 [2021-11-09 10:37:25,546 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 10:37:26,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352223 states. [2021-11-09 10:37:31,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352223 to 337203. [2021-11-09 10:37:31,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337203 states, 337202 states have (on average 1.064302702830944) internal successors, (358885), 337202 states have internal predecessors, (358885), 0 states have call successors, (0), 0 states 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 10:37:32,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337203 states to 337203 states and 358885 transitions. [2021-11-09 10:37:32,241 INFO L78 Accepts]: Start accepts. Automaton has 337203 states and 358885 transitions. Word has length 618 [2021-11-09 10:37:32,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:37:32,241 INFO L470 AbstractCegarLoop]: Abstraction has 337203 states and 358885 transitions. [2021-11-09 10:37:32,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states 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 10:37:32,242 INFO L276 IsEmpty]: Start isEmpty. Operand 337203 states and 358885 transitions. [2021-11-09 10:37:32,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2021-11-09 10:37:32,265 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:37:32,266 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:37:32,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 10:37:32,267 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:37:32,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:37:32,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1015993432, now seen corresponding path program 1 times [2021-11-09 10:37:32,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:37:32,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113467710] [2021-11-09 10:37:32,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:37:32,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms