./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86b2b8eb-6af5-4ef2-b43e-51fa489c32b9/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86b2b8eb-6af5-4ef2-b43e-51fa489c32b9/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86b2b8eb-6af5-4ef2-b43e-51fa489c32b9/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86b2b8eb-6af5-4ef2-b43e-51fa489c32b9/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label03.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86b2b8eb-6af5-4ef2-b43e-51fa489c32b9/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86b2b8eb-6af5-4ef2-b43e-51fa489c32b9/bin/uautomizer-DQz5hQGWxF --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 90400de2e948dc0b7a66852a3651d48f68ed6fc13644dccf9f88145e36827912 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:34:26,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:34:26,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:34:26,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:34:26,052 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:34:26,054 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:34:26,056 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:34:26,058 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:34:26,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:34:26,061 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:34:26,063 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:34:26,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:34:26,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:34:26,066 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:34:26,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:34:26,069 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:34:26,070 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:34:26,071 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:34:26,074 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:34:26,076 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:34:26,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:34:26,079 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:34:26,081 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:34:26,082 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:34:26,085 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:34:26,086 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:34:26,086 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:34:26,088 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:34:26,088 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:34:26,089 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:34:26,090 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:34:26,091 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:34:26,092 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:34:26,093 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:34:26,094 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:34:26,094 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:34:26,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:34:26,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:34:26,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:34:26,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:34:26,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:34:26,098 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86b2b8eb-6af5-4ef2-b43e-51fa489c32b9/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 05:34:26,124 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:34:26,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:34:26,124 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:34:26,125 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:34:26,125 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:34:26,125 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:34:26,126 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:34:26,126 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:34:26,127 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:34:26,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:34:26,127 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:34:26,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:34:26,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:34:26,128 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:34:26,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:34:26,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:34:26,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:34:26,128 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:34:26,129 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:34:26,129 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:34:26,129 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:34:26,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:34:26,129 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:34:26,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:34:26,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:34:26,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:34:26,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:34:26,130 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:34:26,131 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:34:26,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:34:26,131 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:34:26,131 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:34:26,131 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:34:26,132 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:34:26,132 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_86b2b8eb-6af5-4ef2-b43e-51fa489c32b9/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86b2b8eb-6af5-4ef2-b43e-51fa489c32b9/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90400de2e948dc0b7a66852a3651d48f68ed6fc13644dccf9f88145e36827912 [2021-11-20 05:34:26,352 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:34:26,382 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:34:26,384 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:34:26,386 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:34:26,386 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:34:26,388 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86b2b8eb-6af5-4ef2-b43e-51fa489c32b9/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/eca-rers2012/Problem12_label03.c [2021-11-20 05:34:26,479 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86b2b8eb-6af5-4ef2-b43e-51fa489c32b9/bin/uautomizer-DQz5hQGWxF/data/272874b78/4d1ff32e2f8d48288cb0f0c5f9119560/FLAG4d0188ca7 [2021-11-20 05:34:27,306 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:34:27,307 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86b2b8eb-6af5-4ef2-b43e-51fa489c32b9/sv-benchmarks/c/eca-rers2012/Problem12_label03.c [2021-11-20 05:34:27,344 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86b2b8eb-6af5-4ef2-b43e-51fa489c32b9/bin/uautomizer-DQz5hQGWxF/data/272874b78/4d1ff32e2f8d48288cb0f0c5f9119560/FLAG4d0188ca7 [2021-11-20 05:34:27,867 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86b2b8eb-6af5-4ef2-b43e-51fa489c32b9/bin/uautomizer-DQz5hQGWxF/data/272874b78/4d1ff32e2f8d48288cb0f0c5f9119560 [2021-11-20 05:34:27,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:34:27,869 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:34:27,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:34:27,871 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:34:27,885 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:34:27,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:34:27" (1/1) ... [2021-11-20 05:34:27,887 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@deb86cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:27, skipping insertion in model container [2021-11-20 05:34:27,888 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:34:27" (1/1) ... [2021-11-20 05:34:27,895 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:34:28,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:34:28,292 WARN L230 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_86b2b8eb-6af5-4ef2-b43e-51fa489c32b9/sv-benchmarks/c/eca-rers2012/Problem12_label03.c[2698,2711] [2021-11-20 05:34:29,268 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:34:29,282 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:34:29,314 WARN L230 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_86b2b8eb-6af5-4ef2-b43e-51fa489c32b9/sv-benchmarks/c/eca-rers2012/Problem12_label03.c[2698,2711] [2021-11-20 05:34:29,903 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:34:29,928 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:34:29,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:29 WrapperNode [2021-11-20 05:34:29,929 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:34:29,930 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:34:29,931 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:34:29,931 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:34:29,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:29" (1/1) ... [2021-11-20 05:34:30,019 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:29" (1/1) ... [2021-11-20 05:34:30,476 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2021-11-20 05:34:30,476 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:34:30,477 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:34:30,477 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:34:30,478 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:34:30,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:29" (1/1) ... [2021-11-20 05:34:30,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:29" (1/1) ... [2021-11-20 05:34:30,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:29" (1/1) ... [2021-11-20 05:34:30,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:29" (1/1) ... [2021-11-20 05:34:30,713 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:29" (1/1) ... [2021-11-20 05:34:30,750 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:29" (1/1) ... [2021-11-20 05:34:30,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:29" (1/1) ... [2021-11-20 05:34:30,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:34:30,818 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:34:30,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:34:30,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:34:30,821 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:29" (1/1) ... [2021-11-20 05:34:30,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:34:30,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86b2b8eb-6af5-4ef2-b43e-51fa489c32b9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:30,860 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86b2b8eb-6af5-4ef2-b43e-51fa489c32b9/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:34:30,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86b2b8eb-6af5-4ef2-b43e-51fa489c32b9/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:34:31,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:34:31,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:34:31,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:34:31,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:34:31,115 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:34:31,117 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:34:35,841 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:34:35,868 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:34:35,868 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 05:34:35,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:34:35 BoogieIcfgContainer [2021-11-20 05:34:35,873 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:34:35,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:34:35,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:34:35,880 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:34:35,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:34:27" (1/3) ... [2021-11-20 05:34:35,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bdbd02b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:34:35, skipping insertion in model container [2021-11-20 05:34:35,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:29" (2/3) ... [2021-11-20 05:34:35,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bdbd02b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:34:35, skipping insertion in model container [2021-11-20 05:34:35,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:34:35" (3/3) ... [2021-11-20 05:34:35,884 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label03.c [2021-11-20 05:34:35,889 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:34:35,890 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 05:34:35,966 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:34:35,977 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 [2021-11-20 05:34:35,977 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 05:34:36,021 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:36,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 05:34:36,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:36,040 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:36,040 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:36,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:36,046 INFO L85 PathProgramCache]: Analyzing trace with hash 406614337, now seen corresponding path program 1 times [2021-11-20 05:34:36,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:36,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744111681] [2021-11-20 05:34:36,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:36,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:36,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:36,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:34:36,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:36,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744111681] [2021-11-20 05:34:36,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744111681] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:36,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:36,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:34:36,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569016520] [2021-11-20 05:34:36,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:36,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:34:36,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:36,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:34:36,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:34:36,356 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:40,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:40,604 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2021-11-20 05:34:40,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:34:40,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-11-20 05:34:40,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:40,641 INFO L225 Difference]: With dead ends: 2388 [2021-11-20 05:34:40,641 INFO L226 Difference]: Without dead ends: 1506 [2021-11-20 05:34:40,648 INFO L932 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 [2021-11-20 05:34:40,651 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 878 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 3208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 2437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:40,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [878 Valid, 156 Invalid, 3208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 2437 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-20 05:34:40,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-11-20 05:34:40,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2021-11-20 05:34:40,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.8458471760797341) internal successors, (2778), 1505 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:40,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2778 transitions. [2021-11-20 05:34:40,783 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2778 transitions. Word has length 19 [2021-11-20 05:34:40,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:40,784 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 2778 transitions. [2021-11-20 05:34:40,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:40,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2778 transitions. [2021-11-20 05:34:40,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-20 05:34:40,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:40,788 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 05:34:40,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:34:40,789 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:40,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:40,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1913124882, now seen corresponding path program 1 times [2021-11-20 05:34:40,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:40,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601039543] [2021-11-20 05:34:40,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:40,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:40,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:40,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:34:40,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:40,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601039543] [2021-11-20 05:34:40,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601039543] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:40,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:40,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:34:40,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135482579] [2021-11-20 05:34:40,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:40,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:34:40,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:40,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:34:40,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:34:40,995 INFO L87 Difference]: Start difference. First operand 1506 states and 2778 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:44,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:44,678 INFO L93 Difference]: Finished difference Result 3761 states and 6893 transitions. [2021-11-20 05:34:44,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:34:44,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-20 05:34:44,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:44,693 INFO L225 Difference]: With dead ends: 3761 [2021-11-20 05:34:44,694 INFO L226 Difference]: Without dead ends: 2257 [2021-11-20 05:34:44,701 INFO L932 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 [2021-11-20 05:34:44,703 INFO L933 BasicCegarLoop]: 442 mSDtfsCounter, 780 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 864 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 864 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:44,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 448 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [864 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-20 05:34:44,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-11-20 05:34:44,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2257. [2021-11-20 05:34:44,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 2256 states have (on average 1.4419326241134751) internal successors, (3253), 2256 states have internal predecessors, (3253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:44,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3253 transitions. [2021-11-20 05:34:44,780 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3253 transitions. Word has length 88 [2021-11-20 05:34:44,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:44,781 INFO L470 AbstractCegarLoop]: Abstraction has 2257 states and 3253 transitions. [2021-11-20 05:34:44,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:44,782 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3253 transitions. [2021-11-20 05:34:44,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-20 05:34:44,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:44,793 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 05:34:44,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 05:34:44,796 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:44,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:44,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1429226157, now seen corresponding path program 1 times [2021-11-20 05:34:44,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:44,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623634210] [2021-11-20 05:34:44,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:44,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:44,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:34:44,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:44,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623634210] [2021-11-20 05:34:44,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623634210] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:34:44,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447177608] [2021-11-20 05:34:44,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:44,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:44,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86b2b8eb-6af5-4ef2-b43e-51fa489c32b9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:45,003 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86b2b8eb-6af5-4ef2-b43e-51fa489c32b9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:45,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86b2b8eb-6af5-4ef2-b43e-51fa489c32b9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:34:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:45,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:34:45,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:45,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:34:45,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:34:45,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447177608] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:45,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:34:45,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-20 05:34:45,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003842264] [2021-11-20 05:34:45,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:45,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:34:45,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:45,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:34:45,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:34:45,367 INFO L87 Difference]: Start difference. First operand 2257 states and 3253 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:49,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:49,429 INFO L93 Difference]: Finished difference Result 6765 states and 9754 transitions. [2021-11-20 05:34:49,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:34:49,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-11-20 05:34:49,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:49,457 INFO L225 Difference]: With dead ends: 6765 [2021-11-20 05:34:49,457 INFO L226 Difference]: Without dead ends: 4510 [2021-11-20 05:34:49,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:34:49,465 INFO L933 BasicCegarLoop]: 611 mSDtfsCounter, 751 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2273 mSolverCounterSat, 684 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 2957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 684 IncrementalHoareTripleChecker+Valid, 2273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:49,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [751 Valid, 618 Invalid, 2957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [684 Valid, 2273 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-20 05:34:49,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4510 states. [2021-11-20 05:34:49,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4510 to 4510. [2021-11-20 05:34:49,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4510 states, 4509 states have (on average 1.2929696163229096) internal successors, (5830), 4509 states have internal predecessors, (5830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:49,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 5830 transitions. [2021-11-20 05:34:49,578 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 5830 transitions. Word has length 90 [2021-11-20 05:34:49,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:49,579 INFO L470 AbstractCegarLoop]: Abstraction has 4510 states and 5830 transitions. [2021-11-20 05:34:49,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:49,579 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 5830 transitions. [2021-11-20 05:34:49,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-20 05:34:49,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:49,584 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 05:34:49,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86b2b8eb-6af5-4ef2-b43e-51fa489c32b9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:49,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86b2b8eb-6af5-4ef2-b43e-51fa489c32b9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:49,799 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:49,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:49,799 INFO L85 PathProgramCache]: Analyzing trace with hash -944151166, now seen corresponding path program 1 times [2021-11-20 05:34:49,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:49,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315742401] [2021-11-20 05:34:49,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:49,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:34:49,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:49,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315742401] [2021-11-20 05:34:49,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315742401] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:49,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:49,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:34:49,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116936336] [2021-11-20 05:34:49,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:49,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:34:49,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:49,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:34:49,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:34:49,952 INFO L87 Difference]: Start difference. First operand 4510 states and 5830 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:54,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:54,744 INFO L93 Difference]: Finished difference Result 14275 states and 18284 transitions. [2021-11-20 05:34:54,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:34:54,745 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2021-11-20 05:34:54,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:54,798 INFO L225 Difference]: With dead ends: 14275 [2021-11-20 05:34:54,798 INFO L226 Difference]: Without dead ends: 9767 [2021-11-20 05:34:54,805 INFO L932 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 [2021-11-20 05:34:54,806 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 2182 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 4712 mSolverCounterSat, 711 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2182 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 5423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 711 IncrementalHoareTripleChecker+Valid, 4712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:54,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2182 Valid, 164 Invalid, 5423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [711 Valid, 4712 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-20 05:34:54,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2021-11-20 05:34:54,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 9767. [2021-11-20 05:34:55,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.255785377841491) internal successors, (12264), 9766 states have internal predecessors, (12264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:55,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 12264 transitions. [2021-11-20 05:34:55,033 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 12264 transitions. Word has length 96 [2021-11-20 05:34:55,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:55,033 INFO L470 AbstractCegarLoop]: Abstraction has 9767 states and 12264 transitions. [2021-11-20 05:34:55,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:55,034 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 12264 transitions. [2021-11-20 05:34:55,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-20 05:34:55,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:55,038 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:55,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 05:34:55,039 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:55,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:55,040 INFO L85 PathProgramCache]: Analyzing trace with hash 2052675248, now seen corresponding path program 1 times [2021-11-20 05:34:55,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:55,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153585725] [2021-11-20 05:34:55,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:55,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:34:55,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:55,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153585725] [2021-11-20 05:34:55,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153585725] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:55,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:55,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:34:55,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053218950] [2021-11-20 05:34:55,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:55,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:34:55,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:55,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:34:55,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:34:55,295 INFO L87 Difference]: Start difference. First operand 9767 states and 12264 transitions. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:58,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:58,435 INFO L93 Difference]: Finished difference Result 21822 states and 27290 transitions. [2021-11-20 05:34:58,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:34:58,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 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 167 [2021-11-20 05:34:58,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:58,501 INFO L225 Difference]: With dead ends: 21822 [2021-11-20 05:34:58,502 INFO L226 Difference]: Without dead ends: 12771 [2021-11-20 05:34:58,512 INFO L932 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 [2021-11-20 05:34:58,513 INFO L933 BasicCegarLoop]: 598 mSDtfsCounter, 704 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3049 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 3315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 3049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:58,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 612 Invalid, 3315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 3049 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-20 05:34:58,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12771 states. [2021-11-20 05:34:58,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12771 to 12020. [2021-11-20 05:34:58,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12020 states, 12019 states have (on average 1.2085032032615026) internal successors, (14525), 12019 states have internal predecessors, (14525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:58,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12020 states to 12020 states and 14525 transitions. [2021-11-20 05:34:58,782 INFO L78 Accepts]: Start accepts. Automaton has 12020 states and 14525 transitions. Word has length 167 [2021-11-20 05:34:58,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:58,783 INFO L470 AbstractCegarLoop]: Abstraction has 12020 states and 14525 transitions. [2021-11-20 05:34:58,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:58,783 INFO L276 IsEmpty]: Start isEmpty. Operand 12020 states and 14525 transitions. [2021-11-20 05:34:58,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-20 05:34:58,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:58,786 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:58,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 05:34:58,786 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:58,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:58,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1126967559, now seen corresponding path program 1 times [2021-11-20 05:34:58,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:58,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733774232] [2021-11-20 05:34:58,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:58,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:58,967 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-20 05:34:58,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:58,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733774232] [2021-11-20 05:34:58,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733774232] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:58,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:58,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:34:58,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475151786] [2021-11-20 05:34:58,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:58,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:34:58,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:58,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:34:58,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:34:58,969 INFO L87 Difference]: Start difference. First operand 12020 states and 14525 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:01,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:01,952 INFO L93 Difference]: Finished difference Result 31550 states and 38845 transitions. [2021-11-20 05:35:01,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:35:01,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 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 232 [2021-11-20 05:35:01,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:02,000 INFO L225 Difference]: With dead ends: 31550 [2021-11-20 05:35:02,000 INFO L226 Difference]: Without dead ends: 20283 [2021-11-20 05:35:02,012 INFO L932 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 [2021-11-20 05:35:02,013 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 848 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:02,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 312 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-20 05:35:02,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20283 states. [2021-11-20 05:35:02,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20283 to 18779. [2021-11-20 05:35:02,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18779 states, 18778 states have (on average 1.1888380019171372) internal successors, (22324), 18778 states have internal predecessors, (22324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:02,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18779 states to 18779 states and 22324 transitions. [2021-11-20 05:35:02,329 INFO L78 Accepts]: Start accepts. Automaton has 18779 states and 22324 transitions. Word has length 232 [2021-11-20 05:35:02,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:02,331 INFO L470 AbstractCegarLoop]: Abstraction has 18779 states and 22324 transitions. [2021-11-20 05:35:02,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:02,332 INFO L276 IsEmpty]: Start isEmpty. Operand 18779 states and 22324 transitions. [2021-11-20 05:35:02,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2021-11-20 05:35:02,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:02,338 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:02,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 05:35:02,339 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:02,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:02,340 INFO L85 PathProgramCache]: Analyzing trace with hash -362360028, now seen corresponding path program 1 times [2021-11-20 05:35:02,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:02,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073751302] [2021-11-20 05:35:02,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:02,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:02,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:02,530 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-20 05:35:02,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:02,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073751302] [2021-11-20 05:35:02,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073751302] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:35:02,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:35:02,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:35:02,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909223817] [2021-11-20 05:35:02,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:35:02,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:35:02,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:02,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:35:02,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:35:02,533 INFO L87 Difference]: Start difference. First operand 18779 states and 22324 transitions. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:05,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:05,535 INFO L93 Difference]: Finished difference Result 43564 states and 53013 transitions. [2021-11-20 05:35:05,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:35:05,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 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 318 [2021-11-20 05:35:05,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:05,585 INFO L225 Difference]: With dead ends: 43564 [2021-11-20 05:35:05,586 INFO L226 Difference]: Without dead ends: 25538 [2021-11-20 05:35:05,603 INFO L932 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 [2021-11-20 05:35:05,604 INFO L933 BasicCegarLoop]: 1208 mSDtfsCounter, 704 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2254 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 2693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 2254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:05,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 1216 Invalid, 2693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 2254 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-20 05:35:05,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25538 states. [2021-11-20 05:35:05,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25538 to 24036. [2021-11-20 05:35:05,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24036 states, 24035 states have (on average 1.1785313085084252) internal successors, (28326), 24035 states have internal predecessors, (28326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:05,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24036 states to 24036 states and 28326 transitions. [2021-11-20 05:35:05,973 INFO L78 Accepts]: Start accepts. Automaton has 24036 states and 28326 transitions. Word has length 318 [2021-11-20 05:35:05,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:05,974 INFO L470 AbstractCegarLoop]: Abstraction has 24036 states and 28326 transitions. [2021-11-20 05:35:05,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:05,974 INFO L276 IsEmpty]: Start isEmpty. Operand 24036 states and 28326 transitions. [2021-11-20 05:35:05,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2021-11-20 05:35:05,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:05,982 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:05,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 05:35:05,983 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:05,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:05,983 INFO L85 PathProgramCache]: Analyzing trace with hash -664617846, now seen corresponding path program 1 times [2021-11-20 05:35:05,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:05,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954464217] [2021-11-20 05:35:05,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:05,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:06,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 286 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 05:35:06,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:06,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954464217] [2021-11-20 05:35:06,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954464217] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:35:06,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:35:06,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:35:06,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054569087] [2021-11-20 05:35:06,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:35:06,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:35:06,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:06,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:35:06,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:35:06,176 INFO L87 Difference]: Start difference. First operand 24036 states and 28326 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:09,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:09,637 INFO L93 Difference]: Finished difference Result 60837 states and 71503 transitions. [2021-11-20 05:35:09,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:35:09,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 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 346 [2021-11-20 05:35:09,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:09,697 INFO L225 Difference]: With dead ends: 60837 [2021-11-20 05:35:09,697 INFO L226 Difference]: Without dead ends: 37554 [2021-11-20 05:35:09,723 INFO L932 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 [2021-11-20 05:35:09,723 INFO L933 BasicCegarLoop]: 1239 mSDtfsCounter, 635 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2625 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 1247 SdHoareTripleChecker+Invalid, 2958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 2625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:09,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [635 Valid, 1247 Invalid, 2958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 2625 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-20 05:35:09,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37554 states. [2021-11-20 05:35:10,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37554 to 35301. [2021-11-20 05:35:10,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35301 states, 35300 states have (on average 1.1668555240793201) internal successors, (41190), 35300 states have internal predecessors, (41190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:10,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35301 states to 35301 states and 41190 transitions. [2021-11-20 05:35:10,568 INFO L78 Accepts]: Start accepts. Automaton has 35301 states and 41190 transitions. Word has length 346 [2021-11-20 05:35:10,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:10,569 INFO L470 AbstractCegarLoop]: Abstraction has 35301 states and 41190 transitions. [2021-11-20 05:35:10,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:10,570 INFO L276 IsEmpty]: Start isEmpty. Operand 35301 states and 41190 transitions. [2021-11-20 05:35:10,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2021-11-20 05:35:10,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:10,580 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:10,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 05:35:10,581 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:10,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:10,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1139303124, now seen corresponding path program 1 times [2021-11-20 05:35:10,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:10,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262886236] [2021-11-20 05:35:10,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:10,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:10,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:10,763 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-20 05:35:10,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:10,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262886236] [2021-11-20 05:35:10,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262886236] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:35:10,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:35:10,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:35:10,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431724431] [2021-11-20 05:35:10,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:35:10,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:35:10,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:10,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:35:10,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:35:10,771 INFO L87 Difference]: Start difference. First operand 35301 states and 41190 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:14,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:14,304 INFO L93 Difference]: Finished difference Result 102893 states and 120518 transitions. [2021-11-20 05:35:14,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:35:14,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 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 350 [2021-11-20 05:35:14,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:14,511 INFO L225 Difference]: With dead ends: 102893 [2021-11-20 05:35:14,511 INFO L226 Difference]: Without dead ends: 63839 [2021-11-20 05:35:14,530 INFO L932 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 [2021-11-20 05:35:14,533 INFO L933 BasicCegarLoop]: 1307 mSDtfsCounter, 774 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2234 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 2854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 2234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:14,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [774 Valid, 1315 Invalid, 2854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 2234 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-20 05:35:14,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63839 states. [2021-11-20 05:35:15,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63839 to 53325. [2021-11-20 05:35:15,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53325 states, 53324 states have (on average 1.1311416997974646) internal successors, (60317), 53324 states have internal predecessors, (60317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:15,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53325 states to 53325 states and 60317 transitions. [2021-11-20 05:35:15,624 INFO L78 Accepts]: Start accepts. Automaton has 53325 states and 60317 transitions. Word has length 350 [2021-11-20 05:35:15,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:15,625 INFO L470 AbstractCegarLoop]: Abstraction has 53325 states and 60317 transitions. [2021-11-20 05:35:15,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:15,626 INFO L276 IsEmpty]: Start isEmpty. Operand 53325 states and 60317 transitions. [2021-11-20 05:35:15,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2021-11-20 05:35:15,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:15,783 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:15,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 05:35:15,784 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:15,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:15,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1085666052, now seen corresponding path program 1 times [2021-11-20 05:35:15,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:15,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728817482] [2021-11-20 05:35:15,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:15,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:15,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:15,965 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 242 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-20 05:35:15,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:15,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728817482] [2021-11-20 05:35:15,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728817482] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:35:15,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:35:15,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:35:15,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705891878] [2021-11-20 05:35:15,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:35:15,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:35:15,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:15,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:35:15,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:35:15,968 INFO L87 Difference]: Start difference. First operand 53325 states and 60317 transitions. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:19,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:19,439 INFO L93 Difference]: Finished difference Result 135186 states and 154639 transitions. [2021-11-20 05:35:19,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:35:19,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 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 357 [2021-11-20 05:35:19,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:19,564 INFO L225 Difference]: With dead ends: 135186 [2021-11-20 05:35:19,565 INFO L226 Difference]: Without dead ends: 82614 [2021-11-20 05:35:19,595 INFO L932 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 [2021-11-20 05:35:19,596 INFO L933 BasicCegarLoop]: 1227 mSDtfsCounter, 722 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2115 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 2811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 2115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:19,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [722 Valid, 1234 Invalid, 2811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 2115 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-20 05:35:19,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82614 states. [2021-11-20 05:35:20,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82614 to 77357. [2021-11-20 05:35:20,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77357 states, 77356 states have (on average 1.1153627385076788) internal successors, (86280), 77356 states have internal predecessors, (86280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:21,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77357 states to 77357 states and 86280 transitions. [2021-11-20 05:35:21,074 INFO L78 Accepts]: Start accepts. Automaton has 77357 states and 86280 transitions. Word has length 357 [2021-11-20 05:35:21,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:21,074 INFO L470 AbstractCegarLoop]: Abstraction has 77357 states and 86280 transitions. [2021-11-20 05:35:21,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:21,075 INFO L276 IsEmpty]: Start isEmpty. Operand 77357 states and 86280 transitions. [2021-11-20 05:35:21,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2021-11-20 05:35:21,080 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:21,081 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:21,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 05:35:21,081 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:21,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:21,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1508441434, now seen corresponding path program 1 times [2021-11-20 05:35:21,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:21,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607245948] [2021-11-20 05:35:21,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:21,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:21,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:21,262 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2021-11-20 05:35:21,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:21,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607245948] [2021-11-20 05:35:21,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607245948] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:35:21,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:35:21,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:35:21,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830454085] [2021-11-20 05:35:21,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:35:21,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:35:21,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:21,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:35:21,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:35:21,266 INFO L87 Difference]: Start difference. First operand 77357 states and 86280 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:24,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:24,980 INFO L93 Difference]: Finished difference Result 165226 states and 183750 transitions. [2021-11-20 05:35:24,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:35:24,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 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 378 [2021-11-20 05:35:24,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:25,230 INFO L225 Difference]: With dead ends: 165226 [2021-11-20 05:35:25,231 INFO L226 Difference]: Without dead ends: 88622 [2021-11-20 05:35:25,308 INFO L932 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 [2021-11-20 05:35:25,309 INFO L933 BasicCegarLoop]: 1240 mSDtfsCounter, 767 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2420 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 2905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 2420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:25,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [767 Valid, 1248 Invalid, 2905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 2420 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-20 05:35:25,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88622 states. [2021-11-20 05:35:26,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88622 to 85618. [2021-11-20 05:35:26,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85618 states, 85617 states have (on average 1.0999684642068748) internal successors, (94176), 85617 states have internal predecessors, (94176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:26,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85618 states to 85618 states and 94176 transitions. [2021-11-20 05:35:26,460 INFO L78 Accepts]: Start accepts. Automaton has 85618 states and 94176 transitions. Word has length 378 [2021-11-20 05:35:26,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:26,460 INFO L470 AbstractCegarLoop]: Abstraction has 85618 states and 94176 transitions. [2021-11-20 05:35:26,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:26,460 INFO L276 IsEmpty]: Start isEmpty. Operand 85618 states and 94176 transitions. [2021-11-20 05:35:26,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2021-11-20 05:35:26,472 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:26,472 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:26,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 05:35:26,473 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:26,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:26,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1750275416, now seen corresponding path program 1 times [2021-11-20 05:35:26,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:26,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841885918] [2021-11-20 05:35:26,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:26,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:26,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:26,666 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-11-20 05:35:26,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:26,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841885918] [2021-11-20 05:35:26,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841885918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:35:26,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:35:26,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:35:26,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697239814] [2021-11-20 05:35:26,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:35:26,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:35:26,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:26,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:35:26,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:35:26,669 INFO L87 Difference]: Start difference. First operand 85618 states and 94176 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:30,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:30,272 INFO L93 Difference]: Finished difference Result 170483 states and 187594 transitions. [2021-11-20 05:35:30,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:35:30,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 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 454 [2021-11-20 05:35:30,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:30,375 INFO L225 Difference]: With dead ends: 170483 [2021-11-20 05:35:30,375 INFO L226 Difference]: Without dead ends: 85618 [2021-11-20 05:35:30,401 INFO L932 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 [2021-11-20 05:35:30,402 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 799 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2212 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 2708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 2212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:30,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [799 Valid, 408 Invalid, 2708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 2212 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-20 05:35:30,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85618 states. [2021-11-20 05:35:31,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85618 to 83365. [2021-11-20 05:35:31,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83365 states, 83364 states have (on average 1.0677510676071207) internal successors, (89012), 83364 states have internal predecessors, (89012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:31,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83365 states to 83365 states and 89012 transitions. [2021-11-20 05:35:31,460 INFO L78 Accepts]: Start accepts. Automaton has 83365 states and 89012 transitions. Word has length 454 [2021-11-20 05:35:31,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:31,460 INFO L470 AbstractCegarLoop]: Abstraction has 83365 states and 89012 transitions. [2021-11-20 05:35:31,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:31,461 INFO L276 IsEmpty]: Start isEmpty. Operand 83365 states and 89012 transitions. [2021-11-20 05:35:31,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2021-11-20 05:35:31,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:31,809 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 05:35:31,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 05:35:31,809 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:31,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:31,809 INFO L85 PathProgramCache]: Analyzing trace with hash 402091428, now seen corresponding path program 1 times [2021-11-20 05:35:31,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:31,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124301286] [2021-11-20 05:35:31,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:31,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 436 proven. 229 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 05:35:32,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:32,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124301286] [2021-11-20 05:35:32,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124301286] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:35:32,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171091192] [2021-11-20 05:35:32,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:32,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:32,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86b2b8eb-6af5-4ef2-b43e-51fa489c32b9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:35:32,174 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86b2b8eb-6af5-4ef2-b43e-51fa489c32b9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:35:32,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86b2b8eb-6af5-4ef2-b43e-51fa489c32b9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:35:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:32,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:35:32,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:35:33,310 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 369 proven. 0 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2021-11-20 05:35:33,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:35:33,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171091192] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:35:33,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:35:33,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-11-20 05:35:33,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822873138] [2021-11-20 05:35:33,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:35:33,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:35:33,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:33,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:35:33,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:35:33,313 INFO L87 Difference]: Start difference. First operand 83365 states and 89012 transitions. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:36,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:36,596 INFO L93 Difference]: Finished difference Result 187005 states and 201029 transitions. [2021-11-20 05:35:36,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:35:36,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 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 521 [2021-11-20 05:35:36,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:36,699 INFO L225 Difference]: With dead ends: 187005 [2021-11-20 05:35:36,700 INFO L226 Difference]: Without dead ends: 104393 [2021-11-20 05:35:36,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:35:36,732 INFO L933 BasicCegarLoop]: 1383 mSDtfsCounter, 649 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2140 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 1391 SdHoareTripleChecker+Invalid, 2729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 2140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:36,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [649 Valid, 1391 Invalid, 2729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 2140 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-20 05:35:36,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104393 states. [2021-11-20 05:35:37,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104393 to 93128. [2021-11-20 05:35:37,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93128 states, 93127 states have (on average 1.0624738260654805) internal successors, (98945), 93127 states have internal predecessors, (98945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:38,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93128 states to 93128 states and 98945 transitions. [2021-11-20 05:35:38,126 INFO L78 Accepts]: Start accepts. Automaton has 93128 states and 98945 transitions. Word has length 521 [2021-11-20 05:35:38,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:38,127 INFO L470 AbstractCegarLoop]: Abstraction has 93128 states and 98945 transitions. [2021-11-20 05:35:38,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:38,127 INFO L276 IsEmpty]: Start isEmpty. Operand 93128 states and 98945 transitions. [2021-11-20 05:35:38,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 598 [2021-11-20 05:35:38,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:38,156 INFO L514 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:38,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86b2b8eb-6af5-4ef2-b43e-51fa489c32b9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:35:38,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86b2b8eb-6af5-4ef2-b43e-51fa489c32b9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 05:35:38,359 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:38,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:38,359 INFO L85 PathProgramCache]: Analyzing trace with hash -993889648, now seen corresponding path program 1 times [2021-11-20 05:35:38,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:38,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827597367] [2021-11-20 05:35:38,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:38,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:38,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:38,635 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 779 trivial. 0 not checked. [2021-11-20 05:35:38,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:38,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827597367] [2021-11-20 05:35:38,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827597367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:35:38,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:35:38,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:35:38,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006771854] [2021-11-20 05:35:38,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:35:38,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:35:38,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:38,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:35:38,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:35:38,640 INFO L87 Difference]: Start difference. First operand 93128 states and 98945 transitions. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:42,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:42,420 INFO L93 Difference]: Finished difference Result 226808 states and 241560 transitions. [2021-11-20 05:35:42,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:35:42,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 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 597 [2021-11-20 05:35:42,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:42,628 INFO L225 Difference]: With dead ends: 226808 [2021-11-20 05:35:42,628 INFO L226 Difference]: Without dead ends: 134433 [2021-11-20 05:35:42,667 INFO L932 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 [2021-11-20 05:35:42,668 INFO L933 BasicCegarLoop]: 1295 mSDtfsCounter, 746 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 1303 SdHoareTripleChecker+Invalid, 2832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:42,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 1303 Invalid, 2832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-20 05:35:42,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134433 states. [2021-11-20 05:35:44,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134433 to 126172. [2021-11-20 05:35:44,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126172 states, 126171 states have (on average 1.0559241030030673) internal successors, (133227), 126171 states have internal predecessors, (133227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:44,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126172 states to 126172 states and 133227 transitions. [2021-11-20 05:35:44,417 INFO L78 Accepts]: Start accepts. Automaton has 126172 states and 133227 transitions. Word has length 597 [2021-11-20 05:35:44,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:44,417 INFO L470 AbstractCegarLoop]: Abstraction has 126172 states and 133227 transitions. [2021-11-20 05:35:44,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:44,418 INFO L276 IsEmpty]: Start isEmpty. Operand 126172 states and 133227 transitions. [2021-11-20 05:35:44,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 705 [2021-11-20 05:35:44,444 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:44,445 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:44,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 05:35:44,446 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:44,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:44,446 INFO L85 PathProgramCache]: Analyzing trace with hash 197712088, now seen corresponding path program 1 times [2021-11-20 05:35:44,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:44,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677896377] [2021-11-20 05:35:44,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:44,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:44,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,797 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-11-20 05:35:44,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:44,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677896377] [2021-11-20 05:35:44,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677896377] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:35:44,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:35:44,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:35:44,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877005923] [2021-11-20 05:35:44,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:35:44,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:35:44,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:44,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:35:44,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:35:44,800 INFO L87 Difference]: Start difference. First operand 126172 states and 133227 transitions. Second operand has 4 states, 4 states have (on average 116.75) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:51,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:51,145 INFO L93 Difference]: Finished difference Result 379263 states and 401240 transitions. [2021-11-20 05:35:51,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:35:51,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 116.75) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 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 704 [2021-11-20 05:35:51,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:51,419 INFO L225 Difference]: With dead ends: 379263 [2021-11-20 05:35:51,419 INFO L226 Difference]: Without dead ends: 253844 [2021-11-20 05:35:51,464 INFO L932 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 [2021-11-20 05:35:51,465 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1549 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 4786 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1549 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 5393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 4786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:51,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1549 Valid, 36 Invalid, 5393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 4786 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-11-20 05:35:51,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253844 states. [2021-11-20 05:35:54,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253844 to 252340. [2021-11-20 05:35:54,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252340 states, 252339 states have (on average 1.0553818474353944) internal successors, (266314), 252339 states have internal predecessors, (266314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:55,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252340 states to 252340 states and 266314 transitions. [2021-11-20 05:35:55,018 INFO L78 Accepts]: Start accepts. Automaton has 252340 states and 266314 transitions. Word has length 704 [2021-11-20 05:35:55,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:55,019 INFO L470 AbstractCegarLoop]: Abstraction has 252340 states and 266314 transitions. [2021-11-20 05:35:55,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.75) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:55,019 INFO L276 IsEmpty]: Start isEmpty. Operand 252340 states and 266314 transitions. [2021-11-20 05:35:55,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 793 [2021-11-20 05:35:55,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:55,074 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:55,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 05:35:55,075 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:55,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:55,076 INFO L85 PathProgramCache]: Analyzing trace with hash -859404858, now seen corresponding path program 1 times [2021-11-20 05:35:55,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:55,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440784783] [2021-11-20 05:35:55,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:55,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:55,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:55,368 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 571 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-20 05:35:55,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:55,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440784783] [2021-11-20 05:35:55,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440784783] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:35:55,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:35:55,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:35:55,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149416426] [2021-11-20 05:35:55,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:35:55,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:35:55,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:55,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:35:55,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:35:55,372 INFO L87 Difference]: Start difference. First operand 252340 states and 266314 transitions. Second operand has 3 states, 3 states have (on average 220.33333333333334) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:36:00,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:36:00,691 INFO L93 Difference]: Finished difference Result 503927 states and 531870 transitions. [2021-11-20 05:36:00,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:36:00,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 220.33333333333334) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 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 792 [2021-11-20 05:36:00,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:36:00,981 INFO L225 Difference]: With dead ends: 503927 [2021-11-20 05:36:00,982 INFO L226 Difference]: Without dead ends: 252340 [2021-11-20 05:36:01,053 INFO L932 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 [2021-11-20 05:36:01,058 INFO L933 BasicCegarLoop]: 1262 mSDtfsCounter, 680 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 2662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 2228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:36:01,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [680 Valid, 1270 Invalid, 2662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 2228 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-20 05:36:01,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252340 states. [2021-11-20 05:36:03,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252340 to 246332. [2021-11-20 05:36:04,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246332 states, 246331 states have (on average 1.0361302475124934) internal successors, (255231), 246331 states have internal predecessors, (255231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:36:04,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246332 states to 246332 states and 255231 transitions. [2021-11-20 05:36:04,944 INFO L78 Accepts]: Start accepts. Automaton has 246332 states and 255231 transitions. Word has length 792 [2021-11-20 05:36:04,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:36:04,945 INFO L470 AbstractCegarLoop]: Abstraction has 246332 states and 255231 transitions. [2021-11-20 05:36:04,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.33333333333334) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:36:04,945 INFO L276 IsEmpty]: Start isEmpty. Operand 246332 states and 255231 transitions. [2021-11-20 05:36:05,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2021-11-20 05:36:05,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:36:05,062 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:36:05,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 05:36:05,064 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:36:05,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:36:05,065 INFO L85 PathProgramCache]: Analyzing trace with hash -356944632, now seen corresponding path program 1 times [2021-11-20 05:36:05,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:36:05,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576285124] [2021-11-20 05:36:05,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:36:05,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:36:05,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 586 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-11-20 05:36:05,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:36:05,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576285124] [2021-11-20 05:36:05,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576285124] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:36:05,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:36:05,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:36:05,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126685029] [2021-11-20 05:36:05,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:36:05,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:36:05,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:36:05,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:36:05,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:36:05,414 INFO L87 Difference]: Start difference. First operand 246332 states and 255231 transitions. Second operand has 3 states, 3 states have (on average 219.0) internal successors, (657), 3 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)