./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem16_label03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem16_label03.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 68b04b3e92efca531819e21670e21ddf77866a9f1ae7d2feefbb783a67657ca9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:39:23,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:39:23,958 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:39:24,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:39:24,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:39:24,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:39:24,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:39:24,014 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:39:24,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:39:24,017 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:39:24,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:39:24,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:39:24,021 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:39:24,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:39:24,024 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:39:24,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:39:24,028 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:39:24,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:39:24,035 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:39:24,043 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:39:24,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:39:24,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:39:24,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:39:24,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:39:24,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:39:24,053 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:39:24,054 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:39:24,065 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:39:24,065 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:39:24,067 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:39:24,067 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:39:24,068 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:39:24,071 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:39:24,072 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:39:24,074 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:39:24,075 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:39:24,075 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:39:24,076 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:39:24,076 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:39:24,077 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:39:24,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:39:24,080 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:39:24,128 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:39:24,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:39:24,130 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:39:24,136 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:39:24,137 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:39:24,138 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:39:24,138 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:39:24,139 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:39:24,139 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:39:24,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:39:24,140 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:39:24,141 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:39:24,141 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:39:24,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:39:24,141 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:39:24,142 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:39:24,142 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:39:24,142 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:39:24,142 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:39:24,143 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:39:24,143 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:39:24,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:39:24,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:39:24,144 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:39:24,144 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:39:24,144 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:39:24,144 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:39:24,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:39:24,145 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:39:24,146 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:39:24,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:39:24,147 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:39:24,147 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_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68b04b3e92efca531819e21670e21ddf77866a9f1ae7d2feefbb783a67657ca9 [2021-11-09 08:39:24,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:39:24,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:39:24,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:39:24,431 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:39:24,431 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:39:24,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/eca-rers2012/Problem16_label03.c [2021-11-09 08:39:24,505 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/data/7dbec2cd1/2781e0e35fd647c5b843dbd4cc2f58dd/FLAG6645dc2fe [2021-11-09 08:39:25,227 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:39:25,230 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/sv-benchmarks/c/eca-rers2012/Problem16_label03.c [2021-11-09 08:39:25,250 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/data/7dbec2cd1/2781e0e35fd647c5b843dbd4cc2f58dd/FLAG6645dc2fe [2021-11-09 08:39:25,378 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/data/7dbec2cd1/2781e0e35fd647c5b843dbd4cc2f58dd [2021-11-09 08:39:25,380 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:39:25,381 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:39:25,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:39:25,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:39:25,389 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:39:25,390 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:39:25" (1/1) ... [2021-11-09 08:39:25,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@413111a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:39:25, skipping insertion in model container [2021-11-09 08:39:25,392 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:39:25" (1/1) ... [2021-11-09 08:39:25,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:39:25,489 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:39:25,691 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_91d021a1-398b-4801-bb93-dd44a5af9005/sv-benchmarks/c/eca-rers2012/Problem16_label03.c[1025,1038] [2021-11-09 08:39:26,263 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:39:26,273 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:39:26,285 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_91d021a1-398b-4801-bb93-dd44a5af9005/sv-benchmarks/c/eca-rers2012/Problem16_label03.c[1025,1038] [2021-11-09 08:39:26,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:39:26,603 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:39:26,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:39:26 WrapperNode [2021-11-09 08:39:26,604 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:39:26,605 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:39:26,606 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:39:26,606 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:39:26,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:39:26" (1/1) ... [2021-11-09 08:39:26,661 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:39:26" (1/1) ... [2021-11-09 08:39:26,799 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:39:26,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:39:26,800 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:39:26,800 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:39:26,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:39:26" (1/1) ... [2021-11-09 08:39:26,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:39:26" (1/1) ... [2021-11-09 08:39:26,822 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:39:26" (1/1) ... [2021-11-09 08:39:26,822 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:39:26" (1/1) ... [2021-11-09 08:39:26,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:39:26" (1/1) ... [2021-11-09 08:39:26,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:39:26" (1/1) ... [2021-11-09 08:39:26,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:39:26" (1/1) ... [2021-11-09 08:39:26,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:39:27,000 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:39:27,000 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:39:27,000 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:39:27,002 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:39:26" (1/1) ... [2021-11-09 08:39:27,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:39:27,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:27,047 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:39:27,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:39:27,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:39:27,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:39:27,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:39:27,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:39:29,390 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:39:29,390 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-09 08:39:29,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:39:29 BoogieIcfgContainer [2021-11-09 08:39:29,393 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:39:29,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:39:29,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:39:29,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:39:29,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:39:25" (1/3) ... [2021-11-09 08:39:29,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@649e5871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:39:29, skipping insertion in model container [2021-11-09 08:39:29,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:39:26" (2/3) ... [2021-11-09 08:39:29,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@649e5871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:39:29, skipping insertion in model container [2021-11-09 08:39:29,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:39:29" (3/3) ... [2021-11-09 08:39:29,403 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16_label03.c [2021-11-09 08:39:29,408 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:39:29,409 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 08:39:29,463 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:39:29,469 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 08:39:29,470 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 08:39:29,496 INFO L276 IsEmpty]: Start isEmpty. Operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:29,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-09 08:39:29,502 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:29,502 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-09 08:39:29,503 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:29,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:29,509 INFO L85 PathProgramCache]: Analyzing trace with hash 889694410, now seen corresponding path program 1 times [2021-11-09 08:39:29,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:29,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555568955] [2021-11-09 08:39:29,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:29,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:29,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:29,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:39:29,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:29,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555568955] [2021-11-09 08:39:29,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555568955] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:29,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:29,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:39:29,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325192012] [2021-11-09 08:39:29,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:39:29,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:29,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:39:29,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:39:29,737 INFO L87 Difference]: Start difference. First operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 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 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:31,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:31,692 INFO L93 Difference]: Finished difference Result 1122 states and 2103 transitions. [2021-11-09 08:39:31,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:39:31,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-09 08:39:31,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:31,712 INFO L225 Difference]: With dead ends: 1122 [2021-11-09 08:39:31,712 INFO L226 Difference]: Without dead ends: 662 [2021-11-09 08:39:31,717 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:39:31,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-11-09 08:39:31,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2021-11-09 08:39:31,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.5824508320726172) internal successors, (1046), 661 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:31,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1046 transitions. [2021-11-09 08:39:31,797 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1046 transitions. Word has length 6 [2021-11-09 08:39:31,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:31,797 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1046 transitions. [2021-11-09 08:39:31,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:31,798 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1046 transitions. [2021-11-09 08:39:31,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-09 08:39:31,801 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:31,801 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:31,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:39:31,802 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:31,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:31,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1927918847, now seen corresponding path program 1 times [2021-11-09 08:39:31,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:31,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115163699] [2021-11-09 08:39:31,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:31,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:31,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:39:31,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:31,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115163699] [2021-11-09 08:39:31,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115163699] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:31,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:31,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:39:31,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70415750] [2021-11-09 08:39:31,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:39:31,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:31,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:39:31,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:39:31,971 INFO L87 Difference]: Start difference. First operand 662 states and 1046 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:33,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:33,372 INFO L93 Difference]: Finished difference Result 1651 states and 2539 transitions. [2021-11-09 08:39:33,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:39:33,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-09 08:39:33,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:33,383 INFO L225 Difference]: With dead ends: 1651 [2021-11-09 08:39:33,383 INFO L226 Difference]: Without dead ends: 991 [2021-11-09 08:39:33,387 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:39:33,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2021-11-09 08:39:33,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 991. [2021-11-09 08:39:33,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 1.3767676767676769) internal successors, (1363), 990 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:33,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1363 transitions. [2021-11-09 08:39:33,424 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1363 transitions. Word has length 77 [2021-11-09 08:39:33,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:33,424 INFO L470 AbstractCegarLoop]: Abstraction has 991 states and 1363 transitions. [2021-11-09 08:39:33,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:33,425 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1363 transitions. [2021-11-09 08:39:33,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-09 08:39:33,428 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:33,428 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:33,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 08:39:33,428 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:33,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:33,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1360524730, now seen corresponding path program 1 times [2021-11-09 08:39:33,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:33,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747995029] [2021-11-09 08:39:33,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:33,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:33,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:39:33,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:33,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747995029] [2021-11-09 08:39:33,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747995029] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:33,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:33,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:39:33,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269317063] [2021-11-09 08:39:33,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:39:33,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:33,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:39:33,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:39:33,556 INFO L87 Difference]: Start difference. First operand 991 states and 1363 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:35,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:35,104 INFO L93 Difference]: Finished difference Result 2967 states and 4084 transitions. [2021-11-09 08:39:35,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:39:35,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-09 08:39:35,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:35,117 INFO L225 Difference]: With dead ends: 2967 [2021-11-09 08:39:35,117 INFO L226 Difference]: Without dead ends: 1978 [2021-11-09 08:39:35,119 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:39:35,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2021-11-09 08:39:35,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1978. [2021-11-09 08:39:35,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 1.2463328275164391) internal successors, (2464), 1977 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:35,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2464 transitions. [2021-11-09 08:39:35,169 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 2464 transitions. Word has length 78 [2021-11-09 08:39:35,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:35,172 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 2464 transitions. [2021-11-09 08:39:35,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:35,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 2464 transitions. [2021-11-09 08:39:35,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-09 08:39:35,188 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:35,188 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:35,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 08:39:35,189 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:35,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:35,191 INFO L85 PathProgramCache]: Analyzing trace with hash -640794733, now seen corresponding path program 1 times [2021-11-09 08:39:35,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:35,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245879943] [2021-11-09 08:39:35,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:35,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-09 08:39:35,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:35,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245879943] [2021-11-09 08:39:35,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245879943] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:35,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:35,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:39:35,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039372625] [2021-11-09 08:39:35,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:39:35,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:35,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:39:35,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:39:35,369 INFO L87 Difference]: Start difference. First operand 1978 states and 2464 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:37,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:37,040 INFO L93 Difference]: Finished difference Result 4612 states and 5849 transitions. [2021-11-09 08:39:37,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:39:37,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-11-09 08:39:37,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:37,061 INFO L225 Difference]: With dead ends: 4612 [2021-11-09 08:39:37,062 INFO L226 Difference]: Without dead ends: 2636 [2021-11-09 08:39:37,066 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:39:37,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2021-11-09 08:39:37,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2307. [2021-11-09 08:39:37,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 2306 states have (on average 1.2350390286209887) internal successors, (2848), 2306 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:37,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 2848 transitions. [2021-11-09 08:39:37,124 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 2848 transitions. Word has length 161 [2021-11-09 08:39:37,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:37,125 INFO L470 AbstractCegarLoop]: Abstraction has 2307 states and 2848 transitions. [2021-11-09 08:39:37,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:37,126 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 2848 transitions. [2021-11-09 08:39:37,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-11-09 08:39:37,133 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:37,134 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:37,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 08:39:37,134 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:37,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:37,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1617279391, now seen corresponding path program 1 times [2021-11-09 08:39:37,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:37,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670315109] [2021-11-09 08:39:37,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:37,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:37,358 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-11-09 08:39:37,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:37,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670315109] [2021-11-09 08:39:37,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670315109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:37,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:37,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:39:37,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142802809] [2021-11-09 08:39:37,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:39:37,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:37,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:39:37,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:39:37,361 INFO L87 Difference]: Start difference. First operand 2307 states and 2848 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:39,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:39,221 INFO L93 Difference]: Finished difference Result 6915 states and 8539 transitions. [2021-11-09 08:39:39,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:39:39,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 338 [2021-11-09 08:39:39,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:39,257 INFO L225 Difference]: With dead ends: 6915 [2021-11-09 08:39:39,257 INFO L226 Difference]: Without dead ends: 4610 [2021-11-09 08:39:39,261 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:39:39,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2021-11-09 08:39:39,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 4610. [2021-11-09 08:39:39,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4609 states have (on average 1.206552397483185) internal successors, (5561), 4609 states have internal predecessors, (5561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:39,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 5561 transitions. [2021-11-09 08:39:39,364 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 5561 transitions. Word has length 338 [2021-11-09 08:39:39,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:39,364 INFO L470 AbstractCegarLoop]: Abstraction has 4610 states and 5561 transitions. [2021-11-09 08:39:39,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:39,365 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 5561 transitions. [2021-11-09 08:39:39,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-11-09 08:39:39,372 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:39,372 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:39,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 08:39:39,373 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:39,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:39,374 INFO L85 PathProgramCache]: Analyzing trace with hash -913889575, now seen corresponding path program 1 times [2021-11-09 08:39:39,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:39,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549610735] [2021-11-09 08:39:39,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:39,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:39:39,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:39,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549610735] [2021-11-09 08:39:39,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549610735] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:39,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:39,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:39:39,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656325926] [2021-11-09 08:39:39,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:39:39,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:39,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:39:39,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:39:39,733 INFO L87 Difference]: Start difference. First operand 4610 states and 5561 transitions. Second operand has 4 states, 4 states have (on average 89.75) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:41,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:41,341 INFO L93 Difference]: Finished difference Result 9591 states and 11505 transitions. [2021-11-09 08:39:41,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:39:41,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 89.75) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 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 362 [2021-11-09 08:39:41,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:41,369 INFO L225 Difference]: With dead ends: 9591 [2021-11-09 08:39:41,369 INFO L226 Difference]: Without dead ends: 4983 [2021-11-09 08:39:41,375 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:39:41,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4983 states. [2021-11-09 08:39:41,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4983 to 4939. [2021-11-09 08:39:41,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4939 states, 4938 states have (on average 1.194005670311867) internal successors, (5896), 4938 states have internal predecessors, (5896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:41,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4939 states to 4939 states and 5896 transitions. [2021-11-09 08:39:41,486 INFO L78 Accepts]: Start accepts. Automaton has 4939 states and 5896 transitions. Word has length 362 [2021-11-09 08:39:41,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:41,487 INFO L470 AbstractCegarLoop]: Abstraction has 4939 states and 5896 transitions. [2021-11-09 08:39:41,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.75) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:41,488 INFO L276 IsEmpty]: Start isEmpty. Operand 4939 states and 5896 transitions. [2021-11-09 08:39:41,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2021-11-09 08:39:41,498 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:41,499 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:41,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 08:39:41,499 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:41,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:41,500 INFO L85 PathProgramCache]: Analyzing trace with hash -734406808, now seen corresponding path program 1 times [2021-11-09 08:39:41,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:41,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643928621] [2021-11-09 08:39:41,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:41,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:41,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:41,729 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-09 08:39:41,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:41,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643928621] [2021-11-09 08:39:41,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643928621] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:41,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:41,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 08:39:41,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357706153] [2021-11-09 08:39:41,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:39:41,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:41,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:39:41,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:39:41,735 INFO L87 Difference]: Start difference. First operand 4939 states and 5896 transitions. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 6 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:44,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:44,042 INFO L93 Difference]: Finished difference Result 9406 states and 11302 transitions. [2021-11-09 08:39:44,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:39:44,043 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 6 states have internal predecessors, (395), 0 states have call successors, (0), 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 449 [2021-11-09 08:39:44,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:44,065 INFO L225 Difference]: With dead ends: 9406 [2021-11-09 08:39:44,065 INFO L226 Difference]: Without dead ends: 4610 [2021-11-09 08:39:44,071 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:39:44,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2021-11-09 08:39:44,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 4610. [2021-11-09 08:39:44,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4609 states have (on average 1.0744196137990887) internal successors, (4952), 4609 states have internal predecessors, (4952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:44,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 4952 transitions. [2021-11-09 08:39:44,169 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 4952 transitions. Word has length 449 [2021-11-09 08:39:44,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:44,170 INFO L470 AbstractCegarLoop]: Abstraction has 4610 states and 4952 transitions. [2021-11-09 08:39:44,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 6 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:44,171 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 4952 transitions. [2021-11-09 08:39:44,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-11-09 08:39:44,182 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:44,183 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:44,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 08:39:44,183 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:44,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:44,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1783293130, now seen corresponding path program 1 times [2021-11-09 08:39:44,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:44,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069485039] [2021-11-09 08:39:44,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:44,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:44,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:44,445 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 352 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:39:44,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:44,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069485039] [2021-11-09 08:39:44,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069485039] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:44,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:44,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:39:44,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104321539] [2021-11-09 08:39:44,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:39:44,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:44,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:39:44,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:39:44,450 INFO L87 Difference]: Start difference. First operand 4610 states and 4952 transitions. Second operand has 4 states, 4 states have (on average 118.5) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:46,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:46,254 INFO L93 Difference]: Finished difference Result 12837 states and 13873 transitions. [2021-11-09 08:39:46,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:39:46,255 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 118.5) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 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 477 [2021-11-09 08:39:46,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:46,297 INFO L225 Difference]: With dead ends: 12837 [2021-11-09 08:39:46,297 INFO L226 Difference]: Without dead ends: 8558 [2021-11-09 08:39:46,303 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:39:46,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8558 states. [2021-11-09 08:39:46,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8558 to 7900. [2021-11-09 08:39:46,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7900 states, 7899 states have (on average 1.0721610330421572) internal successors, (8469), 7899 states have internal predecessors, (8469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:46,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7900 states to 7900 states and 8469 transitions. [2021-11-09 08:39:46,469 INFO L78 Accepts]: Start accepts. Automaton has 7900 states and 8469 transitions. Word has length 477 [2021-11-09 08:39:46,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:46,470 INFO L470 AbstractCegarLoop]: Abstraction has 7900 states and 8469 transitions. [2021-11-09 08:39:46,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.5) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:46,470 INFO L276 IsEmpty]: Start isEmpty. Operand 7900 states and 8469 transitions. [2021-11-09 08:39:46,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2021-11-09 08:39:46,485 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:46,486 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:46,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 08:39:46,487 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:46,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:46,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1633507050, now seen corresponding path program 1 times [2021-11-09 08:39:46,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:46,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133013244] [2021-11-09 08:39:46,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:46,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:46,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:46,729 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 548 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-09 08:39:46,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:46,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133013244] [2021-11-09 08:39:46,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133013244] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:46,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:46,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:39:46,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996224907] [2021-11-09 08:39:46,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:39:46,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:46,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:39:46,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:39:46,733 INFO L87 Difference]: Start difference. First operand 7900 states and 8469 transitions. Second operand has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:47,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:47,716 INFO L93 Difference]: Finished difference Result 18430 states and 19927 transitions. [2021-11-09 08:39:47,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:39:47,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 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 581 [2021-11-09 08:39:47,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:47,740 INFO L225 Difference]: With dead ends: 18430 [2021-11-09 08:39:47,740 INFO L226 Difference]: Without dead ends: 11190 [2021-11-09 08:39:47,749 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:39:47,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11190 states. [2021-11-09 08:39:47,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11190 to 11190. [2021-11-09 08:39:47,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11190 states, 11189 states have (on average 1.0756993475735097) internal successors, (12036), 11189 states have internal predecessors, (12036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:47,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11190 states to 11190 states and 12036 transitions. [2021-11-09 08:39:47,943 INFO L78 Accepts]: Start accepts. Automaton has 11190 states and 12036 transitions. Word has length 581 [2021-11-09 08:39:47,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:47,944 INFO L470 AbstractCegarLoop]: Abstraction has 11190 states and 12036 transitions. [2021-11-09 08:39:47,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:47,944 INFO L276 IsEmpty]: Start isEmpty. Operand 11190 states and 12036 transitions. [2021-11-09 08:39:47,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 701 [2021-11-09 08:39:47,992 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:47,992 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:47,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 08:39:47,993 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:47,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:47,994 INFO L85 PathProgramCache]: Analyzing trace with hash 709109745, now seen corresponding path program 1 times [2021-11-09 08:39:47,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:47,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197922956] [2021-11-09 08:39:47,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:47,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:48,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 763 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-09 08:39:48,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:48,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197922956] [2021-11-09 08:39:48,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197922956] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:48,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:48,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:39:48,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420419341] [2021-11-09 08:39:48,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:39:48,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:48,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:39:48,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:39:48,287 INFO L87 Difference]: Start difference. First operand 11190 states and 12036 transitions. Second operand has 4 states, 4 states have (on average 130.75) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:49,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:49,460 INFO L93 Difference]: Finished difference Result 21720 states and 23403 transitions. [2021-11-09 08:39:49,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:39:49,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 130.75) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 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 700 [2021-11-09 08:39:49,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:49,482 INFO L225 Difference]: With dead ends: 21720 [2021-11-09 08:39:49,482 INFO L226 Difference]: Without dead ends: 11190 [2021-11-09 08:39:49,494 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:39:49,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11190 states. [2021-11-09 08:39:49,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11190 to 11190. [2021-11-09 08:39:49,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11190 states, 11189 states have (on average 1.0754312270980426) internal successors, (12033), 11189 states have internal predecessors, (12033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:49,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11190 states to 11190 states and 12033 transitions. [2021-11-09 08:39:49,745 INFO L78 Accepts]: Start accepts. Automaton has 11190 states and 12033 transitions. Word has length 700 [2021-11-09 08:39:49,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:49,747 INFO L470 AbstractCegarLoop]: Abstraction has 11190 states and 12033 transitions. [2021-11-09 08:39:49,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 130.75) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:49,747 INFO L276 IsEmpty]: Start isEmpty. Operand 11190 states and 12033 transitions. [2021-11-09 08:39:49,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2021-11-09 08:39:49,760 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:49,761 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:49,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 08:39:49,761 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:49,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:49,762 INFO L85 PathProgramCache]: Analyzing trace with hash -468598081, now seen corresponding path program 1 times [2021-11-09 08:39:49,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:49,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295390817] [2021-11-09 08:39:49,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:49,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1077 backedges. 416 proven. 0 refuted. 0 times theorem prover too weak. 661 trivial. 0 not checked. [2021-11-09 08:39:50,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:50,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295390817] [2021-11-09 08:39:50,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295390817] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:50,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:50,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:39:50,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465015861] [2021-11-09 08:39:50,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:39:50,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:50,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:39:50,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:39:50,071 INFO L87 Difference]: Start difference. First operand 11190 states and 12033 transitions. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:51,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:51,247 INFO L93 Difference]: Finished difference Result 24352 states and 26351 transitions. [2021-11-09 08:39:51,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:39:51,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 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 761 [2021-11-09 08:39:51,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:51,276 INFO L225 Difference]: With dead ends: 24352 [2021-11-09 08:39:51,277 INFO L226 Difference]: Without dead ends: 13822 [2021-11-09 08:39:51,288 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:39:51,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13822 states. [2021-11-09 08:39:51,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13822 to 13164. [2021-11-09 08:39:51,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13164 states, 13163 states have (on average 1.0652586796323027) internal successors, (14022), 13163 states have internal predecessors, (14022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:51,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13164 states to 13164 states and 14022 transitions. [2021-11-09 08:39:51,516 INFO L78 Accepts]: Start accepts. Automaton has 13164 states and 14022 transitions. Word has length 761 [2021-11-09 08:39:51,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:51,518 INFO L470 AbstractCegarLoop]: Abstraction has 13164 states and 14022 transitions. [2021-11-09 08:39:51,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:51,518 INFO L276 IsEmpty]: Start isEmpty. Operand 13164 states and 14022 transitions. [2021-11-09 08:39:51,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 763 [2021-11-09 08:39:51,532 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:51,533 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:51,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 08:39:51,533 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:51,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:51,534 INFO L85 PathProgramCache]: Analyzing trace with hash -238249866, now seen corresponding path program 1 times [2021-11-09 08:39:51,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:51,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651466254] [2021-11-09 08:39:51,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:51,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:51,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:51,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 1062 trivial. 0 not checked. [2021-11-09 08:39:51,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:51,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651466254] [2021-11-09 08:39:51,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651466254] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:51,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:51,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:39:51,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271611430] [2021-11-09 08:39:51,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:39:51,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:51,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:39:51,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:39:51,876 INFO L87 Difference]: Start difference. First operand 13164 states and 14022 transitions. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:52,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:52,993 INFO L93 Difference]: Finished difference Result 26655 states and 28433 transitions. [2021-11-09 08:39:52,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:39:52,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 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 762 [2021-11-09 08:39:52,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:53,021 INFO L225 Difference]: With dead ends: 26655 [2021-11-09 08:39:53,022 INFO L226 Difference]: Without dead ends: 14151 [2021-11-09 08:39:53,035 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:39:53,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14151 states. [2021-11-09 08:39:53,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14151 to 13493. [2021-11-09 08:39:53,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13493 states, 13492 states have (on average 1.0567002668247851) internal successors, (14257), 13492 states have internal predecessors, (14257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:53,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13493 states to 13493 states and 14257 transitions. [2021-11-09 08:39:53,222 INFO L78 Accepts]: Start accepts. Automaton has 13493 states and 14257 transitions. Word has length 762 [2021-11-09 08:39:53,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:53,224 INFO L470 AbstractCegarLoop]: Abstraction has 13493 states and 14257 transitions. [2021-11-09 08:39:53,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:53,225 INFO L276 IsEmpty]: Start isEmpty. Operand 13493 states and 14257 transitions. [2021-11-09 08:39:53,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 792 [2021-11-09 08:39:53,239 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:53,240 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:53,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 08:39:53,240 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:53,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:53,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1636129385, now seen corresponding path program 1 times [2021-11-09 08:39:53,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:53,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301096719] [2021-11-09 08:39:53,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:53,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:53,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:53,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1153 backedges. 489 proven. 0 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2021-11-09 08:39:53,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:53,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301096719] [2021-11-09 08:39:53,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301096719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:53,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:53,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:39:53,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184770687] [2021-11-09 08:39:53,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:39:53,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:53,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:39:53,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:39:53,553 INFO L87 Difference]: Start difference. First operand 13493 states and 14257 transitions. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:54,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:54,638 INFO L93 Difference]: Finished difference Result 26326 states and 27848 transitions. [2021-11-09 08:39:54,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:39:54,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 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 791 [2021-11-09 08:39:54,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:54,660 INFO L225 Difference]: With dead ends: 26326 [2021-11-09 08:39:54,660 INFO L226 Difference]: Without dead ends: 13493 [2021-11-09 08:39:54,668 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:39:54,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13493 states. [2021-11-09 08:39:54,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13493 to 12835. [2021-11-09 08:39:54,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12835 states, 12834 states have (on average 1.0404394576905096) internal successors, (13353), 12834 states have internal predecessors, (13353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:54,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12835 states to 12835 states and 13353 transitions. [2021-11-09 08:39:54,858 INFO L78 Accepts]: Start accepts. Automaton has 12835 states and 13353 transitions. Word has length 791 [2021-11-09 08:39:54,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:54,859 INFO L470 AbstractCegarLoop]: Abstraction has 12835 states and 13353 transitions. [2021-11-09 08:39:54,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:54,860 INFO L276 IsEmpty]: Start isEmpty. Operand 12835 states and 13353 transitions. [2021-11-09 08:39:54,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 850 [2021-11-09 08:39:54,874 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:54,875 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:54,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 08:39:54,876 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:54,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:54,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1969261998, now seen corresponding path program 1 times [2021-11-09 08:39:54,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:54,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7845894] [2021-11-09 08:39:54,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:54,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:55,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 1313 trivial. 0 not checked. [2021-11-09 08:39:55,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:55,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7845894] [2021-11-09 08:39:55,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7845894] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:55,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:55,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:39:55,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968630595] [2021-11-09 08:39:55,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:39:55,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:55,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:39:55,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:39:55,270 INFO L87 Difference]: Start difference. First operand 12835 states and 13353 transitions. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:56,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:56,188 INFO L93 Difference]: Finished difference Result 25010 states and 26040 transitions. [2021-11-09 08:39:56,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:39:56,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 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 849 [2021-11-09 08:39:56,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:56,206 INFO L225 Difference]: With dead ends: 25010 [2021-11-09 08:39:56,206 INFO L226 Difference]: Without dead ends: 12835 [2021-11-09 08:39:56,213 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:39:56,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12835 states. [2021-11-09 08:39:56,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12835 to 12506. [2021-11-09 08:39:56,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12506 states, 12505 states have (on average 1.0357457017193124) internal successors, (12952), 12505 states have internal predecessors, (12952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:56,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12506 states to 12506 states and 12952 transitions. [2021-11-09 08:39:56,378 INFO L78 Accepts]: Start accepts. Automaton has 12506 states and 12952 transitions. Word has length 849 [2021-11-09 08:39:56,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:56,380 INFO L470 AbstractCegarLoop]: Abstraction has 12506 states and 12952 transitions. [2021-11-09 08:39:56,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:56,380 INFO L276 IsEmpty]: Start isEmpty. Operand 12506 states and 12952 transitions. [2021-11-09 08:39:56,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 977 [2021-11-09 08:39:56,453 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:56,454 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:56,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 08:39:56,455 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:56,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:56,456 INFO L85 PathProgramCache]: Analyzing trace with hash 290492193, now seen corresponding path program 1 times [2021-11-09 08:39:56,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:56,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661911176] [2021-11-09 08:39:56,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:56,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:56,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1663 backedges. 359 proven. 0 refuted. 0 times theorem prover too weak. 1304 trivial. 0 not checked. [2021-11-09 08:39:56,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:56,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661911176] [2021-11-09 08:39:56,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661911176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:56,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:56,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:39:56,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143600231] [2021-11-09 08:39:56,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:39:56,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:56,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:39:56,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:39:56,892 INFO L87 Difference]: Start difference. First operand 12506 states and 12952 transitions. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:57,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:57,835 INFO L93 Difference]: Finished difference Result 29616 states and 30721 transitions. [2021-11-09 08:39:57,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:39:57,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 976 [2021-11-09 08:39:57,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:57,853 INFO L225 Difference]: With dead ends: 29616 [2021-11-09 08:39:57,854 INFO L226 Difference]: Without dead ends: 16454 [2021-11-09 08:39:57,861 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:39:57,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16454 states. [2021-11-09 08:39:58,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16454 to 16125. [2021-11-09 08:39:58,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16125 states, 16124 states have (on average 1.0284668816670801) internal successors, (16583), 16124 states have internal predecessors, (16583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:58,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16125 states to 16125 states and 16583 transitions. [2021-11-09 08:39:58,151 INFO L78 Accepts]: Start accepts. Automaton has 16125 states and 16583 transitions. Word has length 976 [2021-11-09 08:39:58,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:58,153 INFO L470 AbstractCegarLoop]: Abstraction has 16125 states and 16583 transitions. [2021-11-09 08:39:58,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:58,153 INFO L276 IsEmpty]: Start isEmpty. Operand 16125 states and 16583 transitions. [2021-11-09 08:39:58,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1183 [2021-11-09 08:39:58,183 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:58,184 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:58,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 08:39:58,184 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:58,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:58,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1605035848, now seen corresponding path program 1 times [2021-11-09 08:39:58,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:58,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042587580] [2021-11-09 08:39:58,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:58,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:58,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:58,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 504 proven. 0 refuted. 0 times theorem prover too weak. 2412 trivial. 0 not checked. [2021-11-09 08:39:58,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:58,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042587580] [2021-11-09 08:39:58,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042587580] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:39:58,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:39:58,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:39:58,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563381856] [2021-11-09 08:39:58,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:39:58,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:58,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:39:58,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:39:58,786 INFO L87 Difference]: Start difference. First operand 16125 states and 16583 transitions. Second operand has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 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) [2021-11-09 08:39:59,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:59,781 INFO L93 Difference]: Finished difference Result 34880 states and 35961 transitions. [2021-11-09 08:39:59,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:39:59,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 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) Word has length 1182 [2021-11-09 08:39:59,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:59,795 INFO L225 Difference]: With dead ends: 34880 [2021-11-09 08:39:59,795 INFO L226 Difference]: Without dead ends: 17112 [2021-11-09 08:39:59,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:39:59,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17112 states. [2021-11-09 08:40:00,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17112 to 15138. [2021-11-09 08:40:00,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15138 states, 15137 states have (on average 1.0272180749157693) internal successors, (15549), 15137 states have internal predecessors, (15549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:00,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15138 states to 15138 states and 15549 transitions. [2021-11-09 08:40:00,075 INFO L78 Accepts]: Start accepts. Automaton has 15138 states and 15549 transitions. Word has length 1182 [2021-11-09 08:40:00,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:00,077 INFO L470 AbstractCegarLoop]: Abstraction has 15138 states and 15549 transitions. [2021-11-09 08:40:00,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 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) [2021-11-09 08:40:00,077 INFO L276 IsEmpty]: Start isEmpty. Operand 15138 states and 15549 transitions. [2021-11-09 08:40:00,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1325 [2021-11-09 08:40:00,122 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:00,123 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:00,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-09 08:40:00,123 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:40:00,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:00,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1885143304, now seen corresponding path program 1 times [2021-11-09 08:40:00,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:00,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502720399] [2021-11-09 08:40:00,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:00,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:00,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:00,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3124 backedges. 1378 proven. 0 refuted. 0 times theorem prover too weak. 1746 trivial. 0 not checked. [2021-11-09 08:40:00,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:00,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502720399] [2021-11-09 08:40:00,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502720399] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:40:00,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:40:00,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:40:00,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555326122] [2021-11-09 08:40:00,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:40:00,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:00,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:40:00,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:40:00,863 INFO L87 Difference]: Start difference. First operand 15138 states and 15549 transitions. Second operand has 3 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:01,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:01,804 INFO L93 Difference]: Finished difference Result 29945 states and 30765 transitions. [2021-11-09 08:40:01,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:40:01,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 0 states have call successors, (0), 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 1324 [2021-11-09 08:40:01,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:01,820 INFO L225 Difference]: With dead ends: 29945 [2021-11-09 08:40:01,820 INFO L226 Difference]: Without dead ends: 15138 [2021-11-09 08:40:01,828 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:40:01,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15138 states. [2021-11-09 08:40:01,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15138 to 14480. [2021-11-09 08:40:01,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14480 states, 14479 states have (on average 1.0205815318737481) internal successors, (14777), 14479 states have internal predecessors, (14777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:02,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14480 states to 14480 states and 14777 transitions. [2021-11-09 08:40:02,002 INFO L78 Accepts]: Start accepts. Automaton has 14480 states and 14777 transitions. Word has length 1324 [2021-11-09 08:40:02,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:02,003 INFO L470 AbstractCegarLoop]: Abstraction has 14480 states and 14777 transitions. [2021-11-09 08:40:02,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:02,004 INFO L276 IsEmpty]: Start isEmpty. Operand 14480 states and 14777 transitions. [2021-11-09 08:40:02,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1388 [2021-11-09 08:40:02,089 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:02,091 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:02,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-09 08:40:02,091 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:40:02,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:02,092 INFO L85 PathProgramCache]: Analyzing trace with hash -931278760, now seen corresponding path program 1 times [2021-11-09 08:40:02,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:02,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521673767] [2021-11-09 08:40:02,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:02,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:02,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:02,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4333 backedges. 2282 proven. 0 refuted. 0 times theorem prover too weak. 2051 trivial. 0 not checked. [2021-11-09 08:40:02,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:02,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521673767] [2021-11-09 08:40:02,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521673767] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:40:02,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:40:02,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:40:02,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811936754] [2021-11-09 08:40:02,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:40:02,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:02,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:40:02,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:40:02,653 INFO L87 Difference]: Start difference. First operand 14480 states and 14777 transitions. Second operand has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:03,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:03,722 INFO L93 Difference]: Finished difference Result 28958 states and 29559 transitions. [2021-11-09 08:40:03,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:40:03,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 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 1387 [2021-11-09 08:40:03,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:03,740 INFO L225 Difference]: With dead ends: 28958 [2021-11-09 08:40:03,740 INFO L226 Difference]: Without dead ends: 15138 [2021-11-09 08:40:03,749 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:40:03,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15138 states. [2021-11-09 08:40:03,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15138 to 15138. [2021-11-09 08:40:03,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15138 states, 15137 states have (on average 1.0200171764550439) internal successors, (15440), 15137 states have internal predecessors, (15440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:03,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15138 states to 15138 states and 15440 transitions. [2021-11-09 08:40:03,956 INFO L78 Accepts]: Start accepts. Automaton has 15138 states and 15440 transitions. Word has length 1387 [2021-11-09 08:40:03,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:03,958 INFO L470 AbstractCegarLoop]: Abstraction has 15138 states and 15440 transitions. [2021-11-09 08:40:03,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:03,958 INFO L276 IsEmpty]: Start isEmpty. Operand 15138 states and 15440 transitions. [2021-11-09 08:40:03,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1411 [2021-11-09 08:40:03,995 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:03,997 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:03,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-09 08:40:03,997 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:40:03,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:03,998 INFO L85 PathProgramCache]: Analyzing trace with hash -517358935, now seen corresponding path program 1 times [2021-11-09 08:40:03,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:03,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105999732] [2021-11-09 08:40:03,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:03,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:04,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4137 backedges. 2480 proven. 0 refuted. 0 times theorem prover too weak. 1657 trivial. 0 not checked. [2021-11-09 08:40:04,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:04,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105999732] [2021-11-09 08:40:04,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105999732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:40:04,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:40:04,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:40:04,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987992604] [2021-11-09 08:40:04,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:40:04,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:04,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:40:04,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:40:04,555 INFO L87 Difference]: Start difference. First operand 15138 states and 15440 transitions. Second operand has 3 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:05,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:05,558 INFO L93 Difference]: Finished difference Result 33235 states and 33895 transitions. [2021-11-09 08:40:05,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:40:05,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 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 1410 [2021-11-09 08:40:05,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:05,573 INFO L225 Difference]: With dead ends: 33235 [2021-11-09 08:40:05,574 INFO L226 Difference]: Without dead ends: 18757 [2021-11-09 08:40:05,584 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:40:05,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18757 states. [2021-11-09 08:40:05,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18757 to 16125. [2021-11-09 08:40:05,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16125 states, 16124 states have (on average 1.01935003721161) internal successors, (16436), 16124 states have internal predecessors, (16436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:05,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16125 states to 16125 states and 16436 transitions. [2021-11-09 08:40:05,809 INFO L78 Accepts]: Start accepts. Automaton has 16125 states and 16436 transitions. Word has length 1410 [2021-11-09 08:40:05,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:05,810 INFO L470 AbstractCegarLoop]: Abstraction has 16125 states and 16436 transitions. [2021-11-09 08:40:05,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:05,811 INFO L276 IsEmpty]: Start isEmpty. Operand 16125 states and 16436 transitions. [2021-11-09 08:40:05,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1452 [2021-11-09 08:40:05,836 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:05,837 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:05,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-09 08:40:05,837 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:40:05,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:05,838 INFO L85 PathProgramCache]: Analyzing trace with hash 339944796, now seen corresponding path program 1 times [2021-11-09 08:40:05,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:05,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352580945] [2021-11-09 08:40:05,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:05,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:06,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4790 backedges. 3189 proven. 41 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2021-11-09 08:40:06,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:06,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352580945] [2021-11-09 08:40:06,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352580945] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:06,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156730286] [2021-11-09 08:40:06,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:06,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:06,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:40:06,795 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:40:06,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:40:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:07,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 1755 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:40:07,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:40:11,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4790 backedges. 1847 proven. 0 refuted. 0 times theorem prover too weak. 2943 trivial. 0 not checked. [2021-11-09 08:40:11,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156730286] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:40:11,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:40:11,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-09 08:40:11,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069853637] [2021-11-09 08:40:11,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:40:11,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:11,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:40:11,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:40:11,174 INFO L87 Difference]: Start difference. First operand 16125 states and 16436 transitions. Second operand has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:12,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:12,035 INFO L93 Difference]: Finished difference Result 31590 states and 32208 transitions. [2021-11-09 08:40:12,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:40:12,036 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 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 1451 [2021-11-09 08:40:12,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:12,051 INFO L225 Difference]: With dead ends: 31590 [2021-11-09 08:40:12,051 INFO L226 Difference]: Without dead ends: 16125 [2021-11-09 08:40:12,057 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1455 GetRequests, 1451 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:40:12,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16125 states. [2021-11-09 08:40:12,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16125 to 16125. [2021-11-09 08:40:12,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16125 states, 16124 states have (on average 1.0191019598114612) internal successors, (16432), 16124 states have internal predecessors, (16432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:12,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16125 states to 16125 states and 16432 transitions. [2021-11-09 08:40:12,209 INFO L78 Accepts]: Start accepts. Automaton has 16125 states and 16432 transitions. Word has length 1451 [2021-11-09 08:40:12,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:12,210 INFO L470 AbstractCegarLoop]: Abstraction has 16125 states and 16432 transitions. [2021-11-09 08:40:12,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:12,211 INFO L276 IsEmpty]: Start isEmpty. Operand 16125 states and 16432 transitions. [2021-11-09 08:40:12,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1503 [2021-11-09 08:40:12,231 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:12,232 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:12,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-09 08:40:12,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:12,441 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:40:12,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:12,442 INFO L85 PathProgramCache]: Analyzing trace with hash 586905219, now seen corresponding path program 1 times [2021-11-09 08:40:12,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:12,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530148157] [2021-11-09 08:40:12,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:12,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:12,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:13,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4383 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 4348 trivial. 0 not checked. [2021-11-09 08:40:13,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:13,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530148157] [2021-11-09 08:40:13,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530148157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:40:13,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:40:13,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:40:13,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486785021] [2021-11-09 08:40:13,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:40:13,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:13,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:40:13,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:40:13,063 INFO L87 Difference]: Start difference. First operand 16125 states and 16432 transitions. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:14,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:14,191 INFO L93 Difference]: Finished difference Result 32248 states and 32867 transitions. [2021-11-09 08:40:14,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:40:14,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 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 1502 [2021-11-09 08:40:14,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:14,202 INFO L225 Difference]: With dead ends: 32248 [2021-11-09 08:40:14,202 INFO L226 Difference]: Without dead ends: 14809 [2021-11-09 08:40:14,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:40:14,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14809 states. [2021-11-09 08:40:14,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14809 to 14480. [2021-11-09 08:40:14,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14480 states, 14479 states have (on average 1.01526348504731) internal successors, (14700), 14479 states have internal predecessors, (14700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:14,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14480 states to 14480 states and 14700 transitions. [2021-11-09 08:40:14,330 INFO L78 Accepts]: Start accepts. Automaton has 14480 states and 14700 transitions. Word has length 1502 [2021-11-09 08:40:14,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:14,332 INFO L470 AbstractCegarLoop]: Abstraction has 14480 states and 14700 transitions. [2021-11-09 08:40:14,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:14,332 INFO L276 IsEmpty]: Start isEmpty. Operand 14480 states and 14700 transitions. [2021-11-09 08:40:14,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1721 [2021-11-09 08:40:14,363 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:14,364 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:14,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-09 08:40:14,364 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:40:14,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:14,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1928064059, now seen corresponding path program 1 times [2021-11-09 08:40:14,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:14,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493601740] [2021-11-09 08:40:14,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:14,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:14,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:15,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5037 backedges. 3379 proven. 0 refuted. 0 times theorem prover too weak. 1658 trivial. 0 not checked. [2021-11-09 08:40:15,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:15,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493601740] [2021-11-09 08:40:15,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493601740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:40:15,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:40:15,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:40:15,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678646924] [2021-11-09 08:40:15,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:40:15,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:15,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:40:15,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:40:15,217 INFO L87 Difference]: Start difference. First operand 14480 states and 14700 transitions. Second operand has 3 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:16,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:16,207 INFO L93 Difference]: Finished difference Result 28300 states and 28736 transitions. [2021-11-09 08:40:16,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:40:16,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 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 1720 [2021-11-09 08:40:16,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:16,217 INFO L225 Difference]: With dead ends: 28300 [2021-11-09 08:40:16,218 INFO L226 Difference]: Without dead ends: 14480 [2021-11-09 08:40:16,223 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:40:16,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14480 states. [2021-11-09 08:40:16,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14480 to 14480. [2021-11-09 08:40:16,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14480 states, 14479 states have (on average 1.0151253539609089) internal successors, (14698), 14479 states have internal predecessors, (14698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:16,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14480 states to 14480 states and 14698 transitions. [2021-11-09 08:40:16,337 INFO L78 Accepts]: Start accepts. Automaton has 14480 states and 14698 transitions. Word has length 1720 [2021-11-09 08:40:16,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:16,338 INFO L470 AbstractCegarLoop]: Abstraction has 14480 states and 14698 transitions. [2021-11-09 08:40:16,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:16,339 INFO L276 IsEmpty]: Start isEmpty. Operand 14480 states and 14698 transitions. [2021-11-09 08:40:16,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1953 [2021-11-09 08:40:16,390 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:16,391 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:16,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-09 08:40:16,391 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:40:16,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:16,392 INFO L85 PathProgramCache]: Analyzing trace with hash -819847659, now seen corresponding path program 1 times [2021-11-09 08:40:16,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:16,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056873375] [2021-11-09 08:40:16,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:16,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:16,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:17,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6860 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 6817 trivial. 0 not checked. [2021-11-09 08:40:17,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:17,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056873375] [2021-11-09 08:40:17,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056873375] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:40:17,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:40:17,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:40:17,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432230197] [2021-11-09 08:40:17,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:40:17,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:17,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:40:17,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:40:17,218 INFO L87 Difference]: Start difference. First operand 14480 states and 14698 transitions. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:18,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:18,176 INFO L93 Difference]: Finished difference Result 31261 states and 31736 transitions. [2021-11-09 08:40:18,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:40:18,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 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 1952 [2021-11-09 08:40:18,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:18,189 INFO L225 Difference]: With dead ends: 31261 [2021-11-09 08:40:18,189 INFO L226 Difference]: Without dead ends: 17112 [2021-11-09 08:40:18,195 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:40:18,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17112 states. [2021-11-09 08:40:18,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17112 to 14480. [2021-11-09 08:40:18,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14480 states, 14479 states have (on average 1.0149872228745078) internal successors, (14696), 14479 states have internal predecessors, (14696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:18,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14480 states to 14480 states and 14696 transitions. [2021-11-09 08:40:18,393 INFO L78 Accepts]: Start accepts. Automaton has 14480 states and 14696 transitions. Word has length 1952 [2021-11-09 08:40:18,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:18,394 INFO L470 AbstractCegarLoop]: Abstraction has 14480 states and 14696 transitions. [2021-11-09 08:40:18,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:18,394 INFO L276 IsEmpty]: Start isEmpty. Operand 14480 states and 14696 transitions. [2021-11-09 08:40:18,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2093 [2021-11-09 08:40:18,425 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:18,426 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:18,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-09 08:40:18,426 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:40:18,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:18,427 INFO L85 PathProgramCache]: Analyzing trace with hash -361642339, now seen corresponding path program 1 times [2021-11-09 08:40:18,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:18,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774262462] [2021-11-09 08:40:18,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:18,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:19,811 INFO L134 CoverageAnalysis]: Checked inductivity of 9093 backedges. 6433 proven. 140 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2021-11-09 08:40:19,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:19,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774262462] [2021-11-09 08:40:19,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774262462] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:19,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150925904] [2021-11-09 08:40:19,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:19,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:19,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:40:19,819 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:40:19,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:40:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:20,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 2462 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:40:21,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:40:25,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9093 backedges. 5273 proven. 0 refuted. 0 times theorem prover too weak. 3820 trivial. 0 not checked. [2021-11-09 08:40:25,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150925904] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:40:25,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:40:25,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-09 08:40:25,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469199934] [2021-11-09 08:40:25,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:40:25,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:25,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:40:25,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:40:25,628 INFO L87 Difference]: Start difference. First operand 14480 states and 14696 transitions. Second operand has 3 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:26,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:26,808 INFO L93 Difference]: Finished difference Result 30274 states and 30734 transitions. [2021-11-09 08:40:26,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:40:26,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 0 states have call successors, (0), 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 2092 [2021-11-09 08:40:26,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:26,822 INFO L225 Difference]: With dead ends: 30274 [2021-11-09 08:40:26,822 INFO L226 Difference]: Without dead ends: 16454 [2021-11-09 08:40:26,828 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2097 GetRequests, 2092 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:40:26,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16454 states. [2021-11-09 08:40:27,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16454 to 15467. [2021-11-09 08:40:27,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15467 states, 15466 states have (on average 1.0144833829044355) internal successors, (15690), 15466 states have internal predecessors, (15690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:27,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15467 states to 15467 states and 15690 transitions. [2021-11-09 08:40:27,032 INFO L78 Accepts]: Start accepts. Automaton has 15467 states and 15690 transitions. Word has length 2092 [2021-11-09 08:40:27,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:27,033 INFO L470 AbstractCegarLoop]: Abstraction has 15467 states and 15690 transitions. [2021-11-09 08:40:27,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:27,034 INFO L276 IsEmpty]: Start isEmpty. Operand 15467 states and 15690 transitions. [2021-11-09 08:40:27,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2124 [2021-11-09 08:40:27,066 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:27,067 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 08:40:27,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-09 08:40:27,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-09 08:40:27,268 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:40:27,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:27,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1059672150, now seen corresponding path program 1 times [2021-11-09 08:40:27,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:27,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859430895] [2021-11-09 08:40:27,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:27,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:27,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9531 backedges. 7042 proven. 78 refuted. 0 times theorem prover too weak. 2411 trivial. 0 not checked. [2021-11-09 08:40:28,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:28,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859430895] [2021-11-09 08:40:28,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859430895] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:28,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008005774] [2021-11-09 08:40:28,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:28,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:28,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:40:28,247 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:40:28,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:40:29,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:29,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 2496 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:40:29,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:41:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9531 backedges. 2715 proven. 0 refuted. 0 times theorem prover too weak. 6816 trivial. 0 not checked. [2021-11-09 08:41:03,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008005774] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:41:03,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:41:03,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-09 08:41:03,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912207782] [2021-11-09 08:41:03,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:41:03,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:03,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:41:03,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:41:03,958 INFO L87 Difference]: Start difference. First operand 15467 states and 15690 transitions. Second operand has 3 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:41:05,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:05,278 INFO L93 Difference]: Finished difference Result 30932 states and 31379 transitions. [2021-11-09 08:41:05,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:41:05,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 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 2123 [2021-11-09 08:41:05,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:05,298 INFO L225 Difference]: With dead ends: 30932 [2021-11-09 08:41:05,298 INFO L226 Difference]: Without dead ends: 16125 [2021-11-09 08:41:05,304 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2128 GetRequests, 2123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:41:05,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16125 states. [2021-11-09 08:41:05,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16125 to 16125. [2021-11-09 08:41:05,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16125 states, 16124 states have (on average 1.0133341602580006) internal successors, (16339), 16124 states have internal predecessors, (16339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:41:05,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16125 states to 16125 states and 16339 transitions. [2021-11-09 08:41:05,444 INFO L78 Accepts]: Start accepts. Automaton has 16125 states and 16339 transitions. Word has length 2123 [2021-11-09 08:41:05,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:05,445 INFO L470 AbstractCegarLoop]: Abstraction has 16125 states and 16339 transitions. [2021-11-09 08:41:05,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:41:05,446 INFO L276 IsEmpty]: Start isEmpty. Operand 16125 states and 16339 transitions. [2021-11-09 08:41:05,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2390 [2021-11-09 08:41:05,484 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:05,485 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2021-11-09 08:41:05,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:41:05,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 08:41:05,686 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:41:05,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:05,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1967894813, now seen corresponding path program 1 times [2021-11-09 08:41:05,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:05,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309969521] [2021-11-09 08:41:05,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:05,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:05,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:06,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11247 backedges. 7896 proven. 140 refuted. 0 times theorem prover too weak. 3211 trivial. 0 not checked. [2021-11-09 08:41:06,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:06,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309969521] [2021-11-09 08:41:06,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309969521] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:06,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261389180] [2021-11-09 08:41:06,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:06,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:06,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:06,877 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:41:06,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d021a1-398b-4801-bb93-dd44a5af9005/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 08:41:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:09,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 2762 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:41:09,256 INFO L286 TraceCheckSpWp]: Computing forward predicates...