./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3b6991f-8c98-4753-957d-de5849898377/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3b6991f-8c98-4753-957d-de5849898377/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3b6991f-8c98-4753-957d-de5849898377/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3b6991f-8c98-4753-957d-de5849898377/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3b6991f-8c98-4753-957d-de5849898377/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3b6991f-8c98-4753-957d-de5849898377/bin/uautomizer-AkOaLMaTGY --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f335fc064cc60cd164eea089db3c8b8685d81b0842015215c5c6d2ca6e9ee077 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:26:41,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:26:41,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:26:41,896 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:26:41,898 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:26:41,903 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:26:41,906 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:26:41,910 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:26:41,916 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:26:41,920 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:26:41,921 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:26:41,925 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:26:41,926 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:26:41,934 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:26:41,937 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:26:41,940 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:26:41,943 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:26:41,945 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:26:41,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:26:41,955 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:26:41,960 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:26:41,962 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:26:41,967 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:26:41,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:26:41,979 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:26:41,980 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:26:41,980 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:26:41,983 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:26:41,984 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:26:41,986 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:26:41,987 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:26:41,988 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:26:41,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:26:41,992 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:26:41,994 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:26:41,995 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:26:41,996 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:26:41,996 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:26:41,996 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:26:41,998 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:26:41,999 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:26:42,000 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3b6991f-8c98-4753-957d-de5849898377/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:26:42,063 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:26:42,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:26:42,067 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:26:42,067 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:26:42,069 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:26:42,070 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:26:42,070 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:26:42,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:26:42,071 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:26:42,071 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:26:42,072 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:26:42,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:26:42,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:26:42,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:26:42,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:26:42,074 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:26:42,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:26:42,074 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:26:42,075 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:26:42,075 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:26:42,075 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:26:42,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:26:42,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:26:42,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:26:42,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:26:42,077 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:26:42,077 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:26:42,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:26:42,078 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:26:42,080 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:26:42,080 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:26:42,080 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:26:42,081 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_e3b6991f-8c98-4753-957d-de5849898377/bin/uautomizer-AkOaLMaTGY/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3b6991f-8c98-4753-957d-de5849898377/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f335fc064cc60cd164eea089db3c8b8685d81b0842015215c5c6d2ca6e9ee077 [2021-11-07 08:26:42,438 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:26:42,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:26:42,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:26:42,466 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:26:42,467 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:26:42,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3b6991f-8c98-4753-957d-de5849898377/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-07 08:26:42,547 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3b6991f-8c98-4753-957d-de5849898377/bin/uautomizer-AkOaLMaTGY/data/1e0891dc8/f65e976ec41c4cc2b81ab9645bb284b8/FLAG94950ceb8 [2021-11-07 08:26:43,189 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:26:43,190 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3b6991f-8c98-4753-957d-de5849898377/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-07 08:26:43,204 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3b6991f-8c98-4753-957d-de5849898377/bin/uautomizer-AkOaLMaTGY/data/1e0891dc8/f65e976ec41c4cc2b81ab9645bb284b8/FLAG94950ceb8 [2021-11-07 08:26:43,492 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3b6991f-8c98-4753-957d-de5849898377/bin/uautomizer-AkOaLMaTGY/data/1e0891dc8/f65e976ec41c4cc2b81ab9645bb284b8 [2021-11-07 08:26:43,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:26:43,497 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:26:43,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:26:43,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:26:43,521 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:26:43,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:26:43" (1/1) ... [2021-11-07 08:26:43,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b8dd7a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:26:43, skipping insertion in model container [2021-11-07 08:26:43,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:26:43" (1/1) ... [2021-11-07 08:26:43,531 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:26:43,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:26:43,849 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_e3b6991f-8c98-4753-957d-de5849898377/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7347,7360] [2021-11-07 08:26:43,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:26:43,904 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:26:43,964 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_e3b6991f-8c98-4753-957d-de5849898377/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7347,7360] [2021-11-07 08:26:44,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:26:44,059 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:26:44,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:26:44 WrapperNode [2021-11-07 08:26:44,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:26:44,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:26:44,063 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:26:44,064 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:26:44,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:26:44" (1/1) ... [2021-11-07 08:26:44,110 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:26:44" (1/1) ... [2021-11-07 08:26:44,190 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:26:44,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:26:44,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:26:44,201 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:26:44,211 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:26:44" (1/1) ... [2021-11-07 08:26:44,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:26:44" (1/1) ... [2021-11-07 08:26:44,216 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:26:44" (1/1) ... [2021-11-07 08:26:44,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:26:44" (1/1) ... [2021-11-07 08:26:44,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:26:44" (1/1) ... [2021-11-07 08:26:44,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:26:44" (1/1) ... [2021-11-07 08:26:44,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:26:44" (1/1) ... [2021-11-07 08:26:44,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:26:44,264 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:26:44,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:26:44,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:26:44,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:26:44" (1/1) ... [2021-11-07 08:26:44,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:26:44,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3b6991f-8c98-4753-957d-de5849898377/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:26:44,305 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3b6991f-8c98-4753-957d-de5849898377/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:26:44,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3b6991f-8c98-4753-957d-de5849898377/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:26:44,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:26:44,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:26:44,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:26:44,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:26:45,315 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:26:45,316 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 08:26:45,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:26:45 BoogieIcfgContainer [2021-11-07 08:26:45,318 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:26:45,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:26:45,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:26:45,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:26:45,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:26:43" (1/3) ... [2021-11-07 08:26:45,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e81551b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:26:45, skipping insertion in model container [2021-11-07 08:26:45,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:26:44" (2/3) ... [2021-11-07 08:26:45,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e81551b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:26:45, skipping insertion in model container [2021-11-07 08:26:45,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:26:45" (3/3) ... [2021-11-07 08:26:45,331 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-07 08:26:45,339 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:26:45,339 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:26:45,404 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:26:45,413 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 08:26:45,414 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:26:45,436 INFO L276 IsEmpty]: Start isEmpty. Operand has 140 states, 138 states have (on average 1.7608695652173914) internal successors, (243), 139 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:45,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 08:26:45,445 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:45,446 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:45,447 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:45,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:45,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1890044597, now seen corresponding path program 1 times [2021-11-07 08:26:45,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:45,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188913400] [2021-11-07 08:26:45,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:45,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:45,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:46,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:46,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:46,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188913400] [2021-11-07 08:26:46,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188913400] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:46,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:26:46,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:26:46,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492660954] [2021-11-07 08:26:46,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:26:46,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:46,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:26:46,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:26:46,173 INFO L87 Difference]: Start difference. First operand has 140 states, 138 states have (on average 1.7608695652173914) internal successors, (243), 139 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:46,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:46,309 INFO L93 Difference]: Finished difference Result 303 states and 512 transitions. [2021-11-07 08:26:46,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:26:46,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 08:26:46,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:46,329 INFO L225 Difference]: With dead ends: 303 [2021-11-07 08:26:46,330 INFO L226 Difference]: Without dead ends: 211 [2021-11-07 08:26:46,334 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:26:46,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-07 08:26:46,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2021-11-07 08:26:46,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.5797101449275361) internal successors, (327), 207 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:46,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 327 transitions. [2021-11-07 08:26:46,408 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 327 transitions. Word has length 56 [2021-11-07 08:26:46,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:46,409 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 327 transitions. [2021-11-07 08:26:46,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:46,411 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 327 transitions. [2021-11-07 08:26:46,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 08:26:46,418 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:46,418 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:46,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:26:46,419 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:46,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:46,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1610685192, now seen corresponding path program 1 times [2021-11-07 08:26:46,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:46,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054185853] [2021-11-07 08:26:46,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:46,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:46,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:46,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054185853] [2021-11-07 08:26:46,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054185853] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:46,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:26:46,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:26:46,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025001996] [2021-11-07 08:26:46,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:26:46,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:46,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:26:46,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:26:46,573 INFO L87 Difference]: Start difference. First operand 208 states and 327 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:46,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:46,642 INFO L93 Difference]: Finished difference Result 502 states and 811 transitions. [2021-11-07 08:26:46,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:26:46,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 08:26:46,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:46,648 INFO L225 Difference]: With dead ends: 502 [2021-11-07 08:26:46,649 INFO L226 Difference]: Without dead ends: 348 [2021-11-07 08:26:46,651 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:26:46,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-11-07 08:26:46,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 344. [2021-11-07 08:26:46,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 1.6005830903790088) internal successors, (549), 343 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:46,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 549 transitions. [2021-11-07 08:26:46,701 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 549 transitions. Word has length 58 [2021-11-07 08:26:46,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:46,702 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 549 transitions. [2021-11-07 08:26:46,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:46,703 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 549 transitions. [2021-11-07 08:26:46,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 08:26:46,707 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:46,707 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:46,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:26:46,708 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:46,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:46,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1017067947, now seen corresponding path program 1 times [2021-11-07 08:26:46,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:46,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822839856] [2021-11-07 08:26:46,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:46,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:46,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:46,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:46,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:46,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822839856] [2021-11-07 08:26:46,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822839856] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:46,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:26:46,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:26:46,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098524993] [2021-11-07 08:26:46,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:26:46,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:46,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:26:46,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:26:46,835 INFO L87 Difference]: Start difference. First operand 344 states and 549 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:46,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:46,945 INFO L93 Difference]: Finished difference Result 896 states and 1451 transitions. [2021-11-07 08:26:46,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:26:46,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 08:26:46,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:46,953 INFO L225 Difference]: With dead ends: 896 [2021-11-07 08:26:46,954 INFO L226 Difference]: Without dead ends: 606 [2021-11-07 08:26:46,960 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:26:46,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-11-07 08:26:47,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 600. [2021-11-07 08:26:47,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 1.6043405676126878) internal successors, (961), 599 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:47,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 961 transitions. [2021-11-07 08:26:47,056 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 961 transitions. Word has length 60 [2021-11-07 08:26:47,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:47,057 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 961 transitions. [2021-11-07 08:26:47,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:47,058 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 961 transitions. [2021-11-07 08:26:47,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 08:26:47,071 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:47,071 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:47,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 08:26:47,072 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:47,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:47,073 INFO L85 PathProgramCache]: Analyzing trace with hash 291448600, now seen corresponding path program 1 times [2021-11-07 08:26:47,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:47,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680628261] [2021-11-07 08:26:47,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:47,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:47,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:47,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:47,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:47,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680628261] [2021-11-07 08:26:47,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680628261] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:47,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:26:47,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:26:47,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81700331] [2021-11-07 08:26:47,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:26:47,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:47,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:26:47,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:26:47,243 INFO L87 Difference]: Start difference. First operand 600 states and 961 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:47,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:47,598 INFO L93 Difference]: Finished difference Result 2588 states and 4247 transitions. [2021-11-07 08:26:47,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:26:47,599 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 08:26:47,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:47,614 INFO L225 Difference]: With dead ends: 2588 [2021-11-07 08:26:47,617 INFO L226 Difference]: Without dead ends: 2042 [2021-11-07 08:26:47,618 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:26:47,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2042 states. [2021-11-07 08:26:47,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2042 to 1077. [2021-11-07 08:26:47,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1076 states have (on average 1.6161710037174721) internal successors, (1739), 1076 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:47,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 1739 transitions. [2021-11-07 08:26:47,720 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 1739 transitions. Word has length 62 [2021-11-07 08:26:47,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:47,723 INFO L470 AbstractCegarLoop]: Abstraction has 1077 states and 1739 transitions. [2021-11-07 08:26:47,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:47,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 1739 transitions. [2021-11-07 08:26:47,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 08:26:47,725 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:47,726 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:47,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 08:26:47,727 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:47,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:47,729 INFO L85 PathProgramCache]: Analyzing trace with hash 382467820, now seen corresponding path program 1 times [2021-11-07 08:26:47,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:47,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458336714] [2021-11-07 08:26:47,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:47,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:47,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:47,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:47,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:47,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458336714] [2021-11-07 08:26:47,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458336714] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:47,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:26:47,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:26:47,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100026614] [2021-11-07 08:26:47,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:26:47,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:47,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:26:47,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:26:47,851 INFO L87 Difference]: Start difference. First operand 1077 states and 1739 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:48,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:48,130 INFO L93 Difference]: Finished difference Result 3142 states and 5146 transitions. [2021-11-07 08:26:48,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:26:48,131 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 08:26:48,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:48,152 INFO L225 Difference]: With dead ends: 3142 [2021-11-07 08:26:48,152 INFO L226 Difference]: Without dead ends: 2119 [2021-11-07 08:26:48,155 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:26:48,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2021-11-07 08:26:48,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 1589. [2021-11-07 08:26:48,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1589 states, 1588 states have (on average 1.6246851385390428) internal successors, (2580), 1588 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:48,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1589 states to 1589 states and 2580 transitions. [2021-11-07 08:26:48,309 INFO L78 Accepts]: Start accepts. Automaton has 1589 states and 2580 transitions. Word has length 63 [2021-11-07 08:26:48,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:48,311 INFO L470 AbstractCegarLoop]: Abstraction has 1589 states and 2580 transitions. [2021-11-07 08:26:48,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:48,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1589 states and 2580 transitions. [2021-11-07 08:26:48,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 08:26:48,314 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:48,314 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:48,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 08:26:48,315 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:48,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:48,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1086345633, now seen corresponding path program 1 times [2021-11-07 08:26:48,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:48,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875537178] [2021-11-07 08:26:48,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:48,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:48,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:48,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:48,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875537178] [2021-11-07 08:26:48,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875537178] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:48,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:26:48,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:26:48,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242034981] [2021-11-07 08:26:48,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:26:48,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:48,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:26:48,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:26:48,410 INFO L87 Difference]: Start difference. First operand 1589 states and 2580 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:48,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:48,715 INFO L93 Difference]: Finished difference Result 4610 states and 7544 transitions. [2021-11-07 08:26:48,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:26:48,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 08:26:48,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:48,748 INFO L225 Difference]: With dead ends: 4610 [2021-11-07 08:26:48,748 INFO L226 Difference]: Without dead ends: 3075 [2021-11-07 08:26:48,752 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:26:48,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2021-11-07 08:26:48,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2320. [2021-11-07 08:26:48,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 2319 states have (on average 1.624407072013799) internal successors, (3767), 2319 states have internal predecessors, (3767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:48,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 3767 transitions. [2021-11-07 08:26:48,981 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 3767 transitions. Word has length 64 [2021-11-07 08:26:48,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:48,982 INFO L470 AbstractCegarLoop]: Abstraction has 2320 states and 3767 transitions. [2021-11-07 08:26:48,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:48,982 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 3767 transitions. [2021-11-07 08:26:48,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 08:26:48,985 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:48,985 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:48,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 08:26:48,986 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:48,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:48,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1879078355, now seen corresponding path program 1 times [2021-11-07 08:26:48,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:48,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021436602] [2021-11-07 08:26:48,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:48,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:49,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:49,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:49,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021436602] [2021-11-07 08:26:49,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021436602] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:49,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:26:49,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:26:49,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015909632] [2021-11-07 08:26:49,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:26:49,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:49,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:26:49,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:26:49,065 INFO L87 Difference]: Start difference. First operand 2320 states and 3767 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:49,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:49,344 INFO L93 Difference]: Finished difference Result 5110 states and 8342 transitions. [2021-11-07 08:26:49,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:26:49,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 08:26:49,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:49,370 INFO L225 Difference]: With dead ends: 5110 [2021-11-07 08:26:49,370 INFO L226 Difference]: Without dead ends: 3501 [2021-11-07 08:26:49,374 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:26:49,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3501 states. [2021-11-07 08:26:49,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3501 to 3499. [2021-11-07 08:26:49,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3499 states, 3498 states have (on average 1.6217838765008576) internal successors, (5673), 3498 states have internal predecessors, (5673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:49,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3499 states to 3499 states and 5673 transitions. [2021-11-07 08:26:49,717 INFO L78 Accepts]: Start accepts. Automaton has 3499 states and 5673 transitions. Word has length 65 [2021-11-07 08:26:49,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:49,717 INFO L470 AbstractCegarLoop]: Abstraction has 3499 states and 5673 transitions. [2021-11-07 08:26:49,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:49,718 INFO L276 IsEmpty]: Start isEmpty. Operand 3499 states and 5673 transitions. [2021-11-07 08:26:49,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 08:26:49,719 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:49,719 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:49,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 08:26:49,720 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:49,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:49,720 INFO L85 PathProgramCache]: Analyzing trace with hash -450865020, now seen corresponding path program 1 times [2021-11-07 08:26:49,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:49,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127816883] [2021-11-07 08:26:49,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:49,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:49,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:49,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127816883] [2021-11-07 08:26:49,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127816883] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:49,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:26:49,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:26:49,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312524078] [2021-11-07 08:26:49,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:26:49,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:49,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:26:49,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:26:49,778 INFO L87 Difference]: Start difference. First operand 3499 states and 5673 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:50,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:50,127 INFO L93 Difference]: Finished difference Result 6917 states and 11273 transitions. [2021-11-07 08:26:50,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:26:50,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 08:26:50,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:50,162 INFO L225 Difference]: With dead ends: 6917 [2021-11-07 08:26:50,163 INFO L226 Difference]: Without dead ends: 4917 [2021-11-07 08:26:50,168 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:26:50,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4917 states. [2021-11-07 08:26:50,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4917 to 4915. [2021-11-07 08:26:50,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4915 states, 4914 states have (on average 1.618030118030118) internal successors, (7951), 4914 states have internal predecessors, (7951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:50,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4915 states to 4915 states and 7951 transitions. [2021-11-07 08:26:50,584 INFO L78 Accepts]: Start accepts. Automaton has 4915 states and 7951 transitions. Word has length 65 [2021-11-07 08:26:50,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:50,584 INFO L470 AbstractCegarLoop]: Abstraction has 4915 states and 7951 transitions. [2021-11-07 08:26:50,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:50,585 INFO L276 IsEmpty]: Start isEmpty. Operand 4915 states and 7951 transitions. [2021-11-07 08:26:50,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 08:26:50,586 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:50,586 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:50,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 08:26:50,587 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:50,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:50,588 INFO L85 PathProgramCache]: Analyzing trace with hash 629635603, now seen corresponding path program 1 times [2021-11-07 08:26:50,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:50,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281085434] [2021-11-07 08:26:50,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:50,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:50,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:50,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:50,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:50,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281085434] [2021-11-07 08:26:50,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281085434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:50,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:26:50,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:26:50,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069397905] [2021-11-07 08:26:50,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:26:50,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:50,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:26:50,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:26:50,646 INFO L87 Difference]: Start difference. First operand 4915 states and 7951 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:51,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:51,477 INFO L93 Difference]: Finished difference Result 15144 states and 24631 transitions. [2021-11-07 08:26:51,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:26:51,479 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 08:26:51,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:51,546 INFO L225 Difference]: With dead ends: 15144 [2021-11-07 08:26:51,546 INFO L226 Difference]: Without dead ends: 10363 [2021-11-07 08:26:51,557 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:26:51,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10363 states. [2021-11-07 08:26:52,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10363 to 7613. [2021-11-07 08:26:52,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7613 states, 7612 states have (on average 1.614424592748292) internal successors, (12289), 7612 states have internal predecessors, (12289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:52,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7613 states to 7613 states and 12289 transitions. [2021-11-07 08:26:52,277 INFO L78 Accepts]: Start accepts. Automaton has 7613 states and 12289 transitions. Word has length 65 [2021-11-07 08:26:52,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:52,277 INFO L470 AbstractCegarLoop]: Abstraction has 7613 states and 12289 transitions. [2021-11-07 08:26:52,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:52,278 INFO L276 IsEmpty]: Start isEmpty. Operand 7613 states and 12289 transitions. [2021-11-07 08:26:52,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 08:26:52,279 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:52,279 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:52,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 08:26:52,280 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:52,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:52,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1734684554, now seen corresponding path program 1 times [2021-11-07 08:26:52,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:52,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746858417] [2021-11-07 08:26:52,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:52,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:52,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:52,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:52,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:52,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746858417] [2021-11-07 08:26:52,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746858417] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:52,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:26:52,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:26:52,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098734222] [2021-11-07 08:26:52,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:26:52,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:52,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:26:52,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:26:52,335 INFO L87 Difference]: Start difference. First operand 7613 states and 12289 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:53,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:53,138 INFO L93 Difference]: Finished difference Result 16687 states and 27284 transitions. [2021-11-07 08:26:53,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:26:53,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 08:26:53,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:53,178 INFO L225 Difference]: With dead ends: 16687 [2021-11-07 08:26:53,178 INFO L226 Difference]: Without dead ends: 11162 [2021-11-07 08:26:53,193 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:26:53,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11162 states. [2021-11-07 08:26:53,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11162 to 11160. [2021-11-07 08:26:53,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11160 states, 11159 states have (on average 1.6188726588403979) internal successors, (18065), 11159 states have internal predecessors, (18065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:54,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11160 states to 11160 states and 18065 transitions. [2021-11-07 08:26:54,019 INFO L78 Accepts]: Start accepts. Automaton has 11160 states and 18065 transitions. Word has length 65 [2021-11-07 08:26:54,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:54,019 INFO L470 AbstractCegarLoop]: Abstraction has 11160 states and 18065 transitions. [2021-11-07 08:26:54,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:54,020 INFO L276 IsEmpty]: Start isEmpty. Operand 11160 states and 18065 transitions. [2021-11-07 08:26:54,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 08:26:54,021 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:54,022 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:54,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 08:26:54,022 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:54,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:54,023 INFO L85 PathProgramCache]: Analyzing trace with hash -2027885532, now seen corresponding path program 1 times [2021-11-07 08:26:54,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:54,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620487763] [2021-11-07 08:26:54,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:54,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:54,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:54,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:54,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:54,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620487763] [2021-11-07 08:26:54,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620487763] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:54,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:26:54,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:26:54,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660213385] [2021-11-07 08:26:54,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:26:54,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:54,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:26:54,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:26:54,152 INFO L87 Difference]: Start difference. First operand 11160 states and 18065 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:54,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:54,996 INFO L93 Difference]: Finished difference Result 22241 states and 36020 transitions. [2021-11-07 08:26:54,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:26:54,996 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 08:26:54,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:55,029 INFO L225 Difference]: With dead ends: 22241 [2021-11-07 08:26:55,030 INFO L226 Difference]: Without dead ends: 11162 [2021-11-07 08:26:55,048 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:26:55,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11162 states. [2021-11-07 08:26:55,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11162 to 11160. [2021-11-07 08:26:55,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11160 states, 11159 states have (on average 1.607670938256116) internal successors, (17940), 11159 states have internal predecessors, (17940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:55,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11160 states to 11160 states and 17940 transitions. [2021-11-07 08:26:55,730 INFO L78 Accepts]: Start accepts. Automaton has 11160 states and 17940 transitions. Word has length 67 [2021-11-07 08:26:55,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:55,730 INFO L470 AbstractCegarLoop]: Abstraction has 11160 states and 17940 transitions. [2021-11-07 08:26:55,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:55,731 INFO L276 IsEmpty]: Start isEmpty. Operand 11160 states and 17940 transitions. [2021-11-07 08:26:55,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 08:26:55,732 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:55,732 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:55,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 08:26:55,733 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:55,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:55,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1776446511, now seen corresponding path program 1 times [2021-11-07 08:26:55,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:55,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847531788] [2021-11-07 08:26:55,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:55,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:55,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:55,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847531788] [2021-11-07 08:26:55,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847531788] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:55,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:26:55,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:26:55,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333439616] [2021-11-07 08:26:55,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:26:55,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:55,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:26:55,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:26:55,897 INFO L87 Difference]: Start difference. First operand 11160 states and 17940 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:57,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:57,130 INFO L93 Difference]: Finished difference Result 31943 states and 51512 transitions. [2021-11-07 08:26:57,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:26:57,131 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 08:26:57,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:57,197 INFO L225 Difference]: With dead ends: 31943 [2021-11-07 08:26:57,197 INFO L226 Difference]: Without dead ends: 20864 [2021-11-07 08:26:57,217 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:26:57,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20864 states. [2021-11-07 08:26:58,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20864 to 20862. [2021-11-07 08:26:58,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20862 states, 20861 states have (on average 1.595944585590336) internal successors, (33293), 20861 states have internal predecessors, (33293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:58,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20862 states to 20862 states and 33293 transitions. [2021-11-07 08:26:58,371 INFO L78 Accepts]: Start accepts. Automaton has 20862 states and 33293 transitions. Word has length 70 [2021-11-07 08:26:58,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:58,372 INFO L470 AbstractCegarLoop]: Abstraction has 20862 states and 33293 transitions. [2021-11-07 08:26:58,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:26:58,372 INFO L276 IsEmpty]: Start isEmpty. Operand 20862 states and 33293 transitions. [2021-11-07 08:26:58,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 08:26:58,373 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:58,373 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:26:58,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 08:26:58,374 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:58,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:58,375 INFO L85 PathProgramCache]: Analyzing trace with hash 762823713, now seen corresponding path program 1 times [2021-11-07 08:26:58,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:58,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958998236] [2021-11-07 08:26:58,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:58,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:58,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:58,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:26:58,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:58,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958998236] [2021-11-07 08:26:58,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958998236] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:58,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:26:58,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:26:58,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343748468] [2021-11-07 08:26:58,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:26:58,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:58,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:26:58,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:26:58,501 INFO L87 Difference]: Start difference. First operand 20862 states and 33293 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:00,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:27:00,675 INFO L93 Difference]: Finished difference Result 39974 states and 63515 transitions. [2021-11-07 08:27:00,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:27:00,681 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 08:27:00,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:27:00,812 INFO L225 Difference]: With dead ends: 39974 [2021-11-07 08:27:00,813 INFO L226 Difference]: Without dead ends: 39972 [2021-11-07 08:27:00,826 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:27:00,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39972 states. [2021-11-07 08:27:02,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39972 to 21586. [2021-11-07 08:27:02,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21586 states, 21585 states have (on average 1.5755385684503127) internal successors, (34008), 21585 states have internal predecessors, (34008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:02,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21586 states to 21586 states and 34008 transitions. [2021-11-07 08:27:02,688 INFO L78 Accepts]: Start accepts. Automaton has 21586 states and 34008 transitions. Word has length 71 [2021-11-07 08:27:02,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:27:02,688 INFO L470 AbstractCegarLoop]: Abstraction has 21586 states and 34008 transitions. [2021-11-07 08:27:02,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:02,689 INFO L276 IsEmpty]: Start isEmpty. Operand 21586 states and 34008 transitions. [2021-11-07 08:27:02,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 08:27:02,691 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:27:02,692 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 08:27:02,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 08:27:02,692 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:27:02,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:27:02,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1613729099, now seen corresponding path program 1 times [2021-11-07 08:27:02,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:27:02,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021284403] [2021-11-07 08:27:02,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:02,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:27:02,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:27:02,772 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:27:02,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:27:02,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021284403] [2021-11-07 08:27:02,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021284403] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:27:02,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:27:02,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:27:02,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726621573] [2021-11-07 08:27:02,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:27:02,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:27:02,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:27:02,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:27:02,775 INFO L87 Difference]: Start difference. First operand 21586 states and 34008 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:05,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:27:05,682 INFO L93 Difference]: Finished difference Result 52602 states and 83212 transitions. [2021-11-07 08:27:05,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:27:05,683 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 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 93 [2021-11-07 08:27:05,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:27:05,789 INFO L225 Difference]: With dead ends: 52602 [2021-11-07 08:27:05,789 INFO L226 Difference]: Without dead ends: 42410 [2021-11-07 08:27:05,825 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:27:05,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42410 states. [2021-11-07 08:27:08,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42410 to 33120. [2021-11-07 08:27:08,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33120 states, 33119 states have (on average 1.5748060025966968) internal successors, (52156), 33119 states have internal predecessors, (52156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:08,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33120 states to 33120 states and 52156 transitions. [2021-11-07 08:27:08,480 INFO L78 Accepts]: Start accepts. Automaton has 33120 states and 52156 transitions. Word has length 93 [2021-11-07 08:27:08,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:27:08,480 INFO L470 AbstractCegarLoop]: Abstraction has 33120 states and 52156 transitions. [2021-11-07 08:27:08,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:08,481 INFO L276 IsEmpty]: Start isEmpty. Operand 33120 states and 52156 transitions. [2021-11-07 08:27:08,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 08:27:08,484 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:27:08,484 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 08:27:08,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 08:27:08,485 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:27:08,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:27:08,485 INFO L85 PathProgramCache]: Analyzing trace with hash 351294822, now seen corresponding path program 1 times [2021-11-07 08:27:08,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:27:08,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539574444] [2021-11-07 08:27:08,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:08,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:27:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:27:08,567 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:27:08,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:27:08,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539574444] [2021-11-07 08:27:08,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539574444] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:27:08,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:27:08,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:27:08,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006285913] [2021-11-07 08:27:08,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:27:08,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:27:08,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:27:08,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:27:08,571 INFO L87 Difference]: Start difference. First operand 33120 states and 52156 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:11,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:27:11,863 INFO L93 Difference]: Finished difference Result 56654 states and 89648 transitions. [2021-11-07 08:27:11,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:27:11,863 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-07 08:27:11,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:27:11,961 INFO L225 Difference]: With dead ends: 56654 [2021-11-07 08:27:11,961 INFO L226 Difference]: Without dead ends: 46462 [2021-11-07 08:27:11,989 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:27:12,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46462 states. [2021-11-07 08:27:15,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46462 to 44808. [2021-11-07 08:27:15,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44808 states, 44807 states have (on average 1.5760930211797264) internal successors, (70620), 44807 states have internal predecessors, (70620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:15,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44808 states to 44808 states and 70620 transitions. [2021-11-07 08:27:15,288 INFO L78 Accepts]: Start accepts. Automaton has 44808 states and 70620 transitions. Word has length 93 [2021-11-07 08:27:15,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:27:15,288 INFO L470 AbstractCegarLoop]: Abstraction has 44808 states and 70620 transitions. [2021-11-07 08:27:15,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:15,288 INFO L276 IsEmpty]: Start isEmpty. Operand 44808 states and 70620 transitions. [2021-11-07 08:27:15,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 08:27:15,291 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:27:15,291 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 08:27:15,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 08:27:15,291 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:27:15,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:27:15,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1758122900, now seen corresponding path program 1 times [2021-11-07 08:27:15,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:27:15,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9148462] [2021-11-07 08:27:15,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:15,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:27:15,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:27:15,371 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:27:15,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:27:15,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9148462] [2021-11-07 08:27:15,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9148462] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:27:15,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:27:15,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:27:15,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066727355] [2021-11-07 08:27:15,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:27:15,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:27:15,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:27:15,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:27:15,374 INFO L87 Difference]: Start difference. First operand 44808 states and 70620 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:19,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:27:19,323 INFO L93 Difference]: Finished difference Result 63524 states and 100708 transitions. [2021-11-07 08:27:19,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:27:19,335 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-07 08:27:19,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:27:19,444 INFO L225 Difference]: With dead ends: 63524 [2021-11-07 08:27:19,444 INFO L226 Difference]: Without dead ends: 53102 [2021-11-07 08:27:19,462 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:27:19,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53102 states. [2021-11-07 08:27:22,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53102 to 51448. [2021-11-07 08:27:23,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51448 states, 51447 states have (on average 1.5791008222053764) internal successors, (81240), 51447 states have internal predecessors, (81240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:23,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51448 states to 51448 states and 81240 transitions. [2021-11-07 08:27:23,170 INFO L78 Accepts]: Start accepts. Automaton has 51448 states and 81240 transitions. Word has length 93 [2021-11-07 08:27:23,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:27:23,171 INFO L470 AbstractCegarLoop]: Abstraction has 51448 states and 81240 transitions. [2021-11-07 08:27:23,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:23,172 INFO L276 IsEmpty]: Start isEmpty. Operand 51448 states and 81240 transitions. [2021-11-07 08:27:23,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 08:27:23,175 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:27:23,176 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 08:27:23,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 08:27:23,176 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:27:23,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:27:23,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1270260760, now seen corresponding path program 1 times [2021-11-07 08:27:23,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:27:23,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026456182] [2021-11-07 08:27:23,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:23,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:27:23,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:27:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:27:23,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:27:23,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026456182] [2021-11-07 08:27:23,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026456182] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:27:23,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:27:23,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:27:23,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548003730] [2021-11-07 08:27:23,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:27:23,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:27:23,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:27:23,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:27:23,252 INFO L87 Difference]: Start difference. First operand 51448 states and 81240 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:27,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:27:27,925 INFO L93 Difference]: Finished difference Result 83821 states and 133089 transitions. [2021-11-07 08:27:27,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:27:27,925 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-07 08:27:27,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:27:28,061 INFO L225 Difference]: With dead ends: 83821 [2021-11-07 08:27:28,061 INFO L226 Difference]: Without dead ends: 66759 [2021-11-07 08:27:28,084 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:27:28,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66759 states. [2021-11-07 08:27:32,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66759 to 65107. [2021-11-07 08:27:32,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65107 states, 65106 states have (on average 1.5796086382207477) internal successors, (102842), 65106 states have internal predecessors, (102842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:32,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65107 states to 65107 states and 102842 transitions. [2021-11-07 08:27:32,935 INFO L78 Accepts]: Start accepts. Automaton has 65107 states and 102842 transitions. Word has length 94 [2021-11-07 08:27:32,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:27:32,936 INFO L470 AbstractCegarLoop]: Abstraction has 65107 states and 102842 transitions. [2021-11-07 08:27:32,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:27:32,936 INFO L276 IsEmpty]: Start isEmpty. Operand 65107 states and 102842 transitions. [2021-11-07 08:27:32,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 08:27:32,939 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:27:32,939 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 08:27:32,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 08:27:32,940 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:27:32,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:27:32,941 INFO L85 PathProgramCache]: Analyzing trace with hash 36164624, now seen corresponding path program 1 times [2021-11-07 08:27:32,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:27:32,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820069178] [2021-11-07 08:27:32,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:27:32,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:27:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:27:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:27:32,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:27:32,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820069178] [2021-11-07 08:27:32,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820069178] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:27:32,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:27:32,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:27:32,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421502460] [2021-11-07 08:27:32,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:27:32,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:27:32,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:27:32,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:27:32,998 INFO L87 Difference]: Start difference. First operand 65107 states and 102842 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)