./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label47.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label47.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa --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 9caa4030530e2e9671468e08c95e91bac3f6959ea80b1f57c09b5d22d183ce56 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 21:41:43,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 21:41:43,860 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 21:41:43,894 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 21:41:43,894 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 21:41:43,895 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 21:41:43,897 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 21:41:43,899 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 21:41:43,901 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 21:41:43,902 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 21:41:43,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 21:41:43,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 21:41:43,905 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 21:41:43,911 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 21:41:43,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 21:41:43,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 21:41:43,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 21:41:43,917 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 21:41:43,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 21:41:43,921 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 21:41:43,923 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 21:41:43,924 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 21:41:43,925 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 21:41:43,926 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 21:41:43,929 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 21:41:43,929 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 21:41:43,929 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 21:41:43,930 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 21:41:43,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 21:41:43,937 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 21:41:43,938 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 21:41:43,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 21:41:43,939 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 21:41:43,940 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 21:41:43,940 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 21:41:43,941 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 21:41:43,941 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 21:41:43,941 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 21:41:43,941 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 21:41:43,942 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 21:41:43,942 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 21:41:43,943 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 21:41:43,960 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 21:41:43,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 21:41:43,961 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 21:41:43,961 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 21:41:43,961 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 21:41:43,961 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 21:41:43,962 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 21:41:43,962 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 21:41:43,962 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 21:41:43,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 21:41:43,962 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 21:41:43,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 21:41:43,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 21:41:43,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 21:41:43,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 21:41:43,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 21:41:43,963 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 21:41:43,963 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 21:41:43,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 21:41:43,963 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 21:41:43,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 21:41:43,964 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 21:41:43,964 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 21:41:43,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 21:41:43,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:41:43,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 21:41:43,964 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 21:41:43,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 21:41:43,964 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 21:41:43,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 21:41:43,965 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 21:41:43,965 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 21:41:43,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 21:41:43,965 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 21:41:43,965 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_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9caa4030530e2e9671468e08c95e91bac3f6959ea80b1f57c09b5d22d183ce56 [2021-12-06 21:41:44,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 21:41:44,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 21:41:44,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 21:41:44,147 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 21:41:44,148 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 21:41:44,149 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/eca-rers2012/Problem13_label47.c [2021-12-06 21:41:44,191 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/data/8f98e037f/07dc1f117ab445a1832cf0e246164dd2/FLAG596534c46 [2021-12-06 21:41:44,820 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 21:41:44,821 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/sv-benchmarks/c/eca-rers2012/Problem13_label47.c [2021-12-06 21:41:44,845 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/data/8f98e037f/07dc1f117ab445a1832cf0e246164dd2/FLAG596534c46 [2021-12-06 21:41:45,225 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/data/8f98e037f/07dc1f117ab445a1832cf0e246164dd2 [2021-12-06 21:41:45,227 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 21:41:45,228 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 21:41:45,229 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 21:41:45,229 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 21:41:45,231 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 21:41:45,232 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:41:45" (1/1) ... [2021-12-06 21:41:45,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4308ed2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:41:45, skipping insertion in model container [2021-12-06 21:41:45,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:41:45" (1/1) ... [2021-12-06 21:41:45,238 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 21:41:45,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 21:41:45,501 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_a0070369-b82c-4285-aa71-90c8134bb21e/sv-benchmarks/c/eca-rers2012/Problem13_label47.c[6189,6202] [2021-12-06 21:41:46,167 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:41:46,173 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 21:41:46,203 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_a0070369-b82c-4285-aa71-90c8134bb21e/sv-benchmarks/c/eca-rers2012/Problem13_label47.c[6189,6202] [2021-12-06 21:41:46,651 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:41:46,671 INFO L208 MainTranslator]: Completed translation [2021-12-06 21:41:46,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:41:46 WrapperNode [2021-12-06 21:41:46,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 21:41:46,672 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 21:41:46,672 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 21:41:46,672 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 21:41:46,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:41:46" (1/1) ... [2021-12-06 21:41:46,757 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:41:46" (1/1) ... [2021-12-06 21:41:47,145 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-06 21:41:47,145 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 21:41:47,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 21:41:47,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 21:41:47,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 21:41:47,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:41:46" (1/1) ... [2021-12-06 21:41:47,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:41:46" (1/1) ... [2021-12-06 21:41:47,219 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:41:46" (1/1) ... [2021-12-06 21:41:47,219 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:41:46" (1/1) ... [2021-12-06 21:41:47,413 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:41:46" (1/1) ... [2021-12-06 21:41:47,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:41:46" (1/1) ... [2021-12-06 21:41:47,489 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:41:46" (1/1) ... [2021-12-06 21:41:47,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 21:41:47,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 21:41:47,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 21:41:47,534 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 21:41:47,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:41:46" (1/1) ... [2021-12-06 21:41:47,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:41:47,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:41:47,565 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 21:41:47,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 21:41:47,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 21:41:47,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 21:41:47,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 21:41:47,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 21:41:47,650 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 21:41:47,651 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 21:41:51,203 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 21:41:51,218 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 21:41:51,219 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 21:41:51,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:41:51 BoogieIcfgContainer [2021-12-06 21:41:51,221 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 21:41:51,223 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 21:41:51,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 21:41:51,225 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 21:41:51,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 09:41:45" (1/3) ... [2021-12-06 21:41:51,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bb4948c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:41:51, skipping insertion in model container [2021-12-06 21:41:51,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:41:46" (2/3) ... [2021-12-06 21:41:51,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bb4948c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:41:51, skipping insertion in model container [2021-12-06 21:41:51,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:41:51" (3/3) ... [2021-12-06 21:41:51,227 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label47.c [2021-12-06 21:41:51,231 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 21:41:51,231 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 21:41:51,270 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 21:41:51,275 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 [2021-12-06 21:41:51,275 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 21:41:51,302 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:41:51,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 21:41:51,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:41:51,308 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:41:51,308 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:41:51,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:41:51,312 INFO L85 PathProgramCache]: Analyzing trace with hash 712930081, now seen corresponding path program 1 times [2021-12-06 21:41:51,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:41:51,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473149603] [2021-12-06 21:41:51,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:41:51,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:41:51,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:41:51,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:41:51,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:41:51,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473149603] [2021-12-06 21:41:51,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473149603] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:41:51,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:41:51,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:41:51,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380121449] [2021-12-06 21:41:51,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:41:51,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:41:51,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:41:51,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:41:51,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:41:51,563 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:41:56,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:41:56,604 INFO L93 Difference]: Finished difference Result 3829 states and 7206 transitions. [2021-12-06 21:41:56,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:41:56,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-06 21:41:56,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:41:56,636 INFO L225 Difference]: With dead ends: 3829 [2021-12-06 21:41:56,636 INFO L226 Difference]: Without dead ends: 2664 [2021-12-06 21:41:56,642 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 [2021-12-06 21:41:56,646 INFO L933 BasicCegarLoop]: 761 mSDtfsCounter, 2704 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 4246 mSolverCounterSat, 1610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2704 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 5856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1610 IncrementalHoareTripleChecker+Valid, 4246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-06 21:41:56,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2704 Valid, 1067 Invalid, 5856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1610 Valid, 4246 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-06 21:41:56,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-12-06 21:41:56,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2663. [2021-12-06 21:41:56,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2662 states have (on average 1.460931630353118) internal successors, (3889), 2662 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:41:56,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 3889 transitions. [2021-12-06 21:41:56,761 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 3889 transitions. Word has length 43 [2021-12-06 21:41:56,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:41:56,762 INFO L470 AbstractCegarLoop]: Abstraction has 2663 states and 3889 transitions. [2021-12-06 21:41:56,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:41:56,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 3889 transitions. [2021-12-06 21:41:56,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-06 21:41:56,768 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:41:56,768 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:41:56,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 21:41:56,769 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:41:56,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:41:56,769 INFO L85 PathProgramCache]: Analyzing trace with hash 739782231, now seen corresponding path program 1 times [2021-12-06 21:41:56,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:41:56,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246621041] [2021-12-06 21:41:56,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:41:56,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:41:56,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:41:57,030 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:41:57,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:41:57,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246621041] [2021-12-06 21:41:57,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246621041] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:41:57,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218967063] [2021-12-06 21:41:57,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:41:57,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:41:57,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:41:57,032 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:41:57,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 21:41:57,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:41:57,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 21:41:57,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:41:57,351 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 21:41:57,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:41:57,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218967063] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:41:57,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:41:57,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-06 21:41:57,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598069403] [2021-12-06 21:41:57,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:41:57,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:41:57,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:41:57,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:41:57,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:41:57,354 INFO L87 Difference]: Start difference. First operand 2663 states and 3889 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:00,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:42:00,574 INFO L93 Difference]: Finished difference Result 6142 states and 9712 transitions. [2021-12-06 21:42:00,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:42:00,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 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 168 [2021-12-06 21:42:00,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:42:00,592 INFO L225 Difference]: With dead ends: 6142 [2021-12-06 21:42:00,593 INFO L226 Difference]: Without dead ends: 4268 [2021-12-06 21:42:00,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:42:00,596 INFO L933 BasicCegarLoop]: 1039 mSDtfsCounter, 743 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 2508 mSolverCounterSat, 778 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 3286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 778 IncrementalHoareTripleChecker+Valid, 2508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:42:00,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [743 Valid, 1188 Invalid, 3286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [778 Valid, 2508 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-06 21:42:00,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4268 states. [2021-12-06 21:42:00,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4268 to 4254. [2021-12-06 21:42:00,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4254 states, 4253 states have (on average 1.3515165765342112) internal successors, (5748), 4253 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:00,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4254 states to 4254 states and 5748 transitions. [2021-12-06 21:42:00,664 INFO L78 Accepts]: Start accepts. Automaton has 4254 states and 5748 transitions. Word has length 168 [2021-12-06 21:42:00,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:42:00,665 INFO L470 AbstractCegarLoop]: Abstraction has 4254 states and 5748 transitions. [2021-12-06 21:42:00,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:00,666 INFO L276 IsEmpty]: Start isEmpty. Operand 4254 states and 5748 transitions. [2021-12-06 21:42:00,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-12-06 21:42:00,670 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:42:00,670 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 21:42:00,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 21:42:00,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-06 21:42:00,871 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:42:00,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:42:00,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1528917195, now seen corresponding path program 1 times [2021-12-06 21:42:00,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:42:00,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222782807] [2021-12-06 21:42:00,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:42:00,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:42:00,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:42:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-06 21:42:00,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:42:00,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222782807] [2021-12-06 21:42:00,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222782807] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:42:00,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:42:00,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:42:00,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57866954] [2021-12-06 21:42:00,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:42:00,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:42:00,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:42:00,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:42:00,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:42:00,992 INFO L87 Difference]: Start difference. First operand 4254 states and 5748 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:03,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:42:03,879 INFO L93 Difference]: Finished difference Result 10899 states and 15275 transitions. [2021-12-06 21:42:03,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:42:03,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 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 210 [2021-12-06 21:42:03,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:42:03,906 INFO L225 Difference]: With dead ends: 10899 [2021-12-06 21:42:03,907 INFO L226 Difference]: Without dead ends: 7434 [2021-12-06 21:42:03,911 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 [2021-12-06 21:42:03,912 INFO L933 BasicCegarLoop]: 825 mSDtfsCounter, 906 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2568 mSolverCounterSat, 754 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 3322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 754 IncrementalHoareTripleChecker+Valid, 2568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 21:42:03,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [906 Valid, 957 Invalid, 3322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [754 Valid, 2568 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 21:42:03,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7434 states. [2021-12-06 21:42:04,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7434 to 7426. [2021-12-06 21:42:04,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7426 states, 7425 states have (on average 1.288888888888889) internal successors, (9570), 7425 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:04,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7426 states to 7426 states and 9570 transitions. [2021-12-06 21:42:04,035 INFO L78 Accepts]: Start accepts. Automaton has 7426 states and 9570 transitions. Word has length 210 [2021-12-06 21:42:04,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:42:04,035 INFO L470 AbstractCegarLoop]: Abstraction has 7426 states and 9570 transitions. [2021-12-06 21:42:04,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:04,035 INFO L276 IsEmpty]: Start isEmpty. Operand 7426 states and 9570 transitions. [2021-12-06 21:42:04,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-12-06 21:42:04,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:42:04,038 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:42:04,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 21:42:04,038 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:42:04,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:42:04,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1948520814, now seen corresponding path program 1 times [2021-12-06 21:42:04,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:42:04,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276291029] [2021-12-06 21:42:04,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:42:04,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:42:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:42:04,125 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 21:42:04,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:42:04,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276291029] [2021-12-06 21:42:04,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276291029] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:42:04,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:42:04,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:42:04,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308298651] [2021-12-06 21:42:04,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:42:04,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:42:04,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:42:04,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:42:04,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:42:04,128 INFO L87 Difference]: Start difference. First operand 7426 states and 9570 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:07,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:42:07,134 INFO L93 Difference]: Finished difference Result 19621 states and 25905 transitions. [2021-12-06 21:42:07,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:42:07,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 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 224 [2021-12-06 21:42:07,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:42:07,181 INFO L225 Difference]: With dead ends: 19621 [2021-12-06 21:42:07,181 INFO L226 Difference]: Without dead ends: 12984 [2021-12-06 21:42:07,187 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 [2021-12-06 21:42:07,188 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 909 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 2890 mSolverCounterSat, 539 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 3429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 2890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-06 21:42:07,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [909 Valid, 638 Invalid, 3429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 2890 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-06 21:42:07,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12984 states. [2021-12-06 21:42:07,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12984 to 12975. [2021-12-06 21:42:07,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12975 states, 12974 states have (on average 1.2720826267920455) internal successors, (16504), 12974 states have internal predecessors, (16504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:07,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12975 states to 12975 states and 16504 transitions. [2021-12-06 21:42:07,370 INFO L78 Accepts]: Start accepts. Automaton has 12975 states and 16504 transitions. Word has length 224 [2021-12-06 21:42:07,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:42:07,371 INFO L470 AbstractCegarLoop]: Abstraction has 12975 states and 16504 transitions. [2021-12-06 21:42:07,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:07,371 INFO L276 IsEmpty]: Start isEmpty. Operand 12975 states and 16504 transitions. [2021-12-06 21:42:07,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-12-06 21:42:07,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:42:07,374 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 21:42:07,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 21:42:07,374 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:42:07,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:42:07,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1408513717, now seen corresponding path program 1 times [2021-12-06 21:42:07,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:42:07,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079868313] [2021-12-06 21:42:07,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:42:07,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:42:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:42:07,461 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-06 21:42:07,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:42:07,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079868313] [2021-12-06 21:42:07,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079868313] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:42:07,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:42:07,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:42:07,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111232555] [2021-12-06 21:42:07,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:42:07,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:42:07,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:42:07,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:42:07,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:42:07,464 INFO L87 Difference]: Start difference. First operand 12975 states and 16504 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 2 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:10,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:42:10,044 INFO L93 Difference]: Finished difference Result 36180 states and 46598 transitions. [2021-12-06 21:42:10,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:42:10,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 2 states have internal predecessors, (170), 0 states have call successors, (0), 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 240 [2021-12-06 21:42:10,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:42:10,076 INFO L225 Difference]: With dead ends: 36180 [2021-12-06 21:42:10,076 INFO L226 Difference]: Without dead ends: 23994 [2021-12-06 21:42:10,086 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 [2021-12-06 21:42:10,087 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 857 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 869 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 3177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 869 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 21:42:10,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [857 Valid, 986 Invalid, 3177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [869 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 21:42:10,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23994 states. [2021-12-06 21:42:10,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23994 to 23203. [2021-12-06 21:42:10,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23203 states, 23202 states have (on average 1.2067494181536074) internal successors, (27999), 23202 states have internal predecessors, (27999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:10,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23203 states to 23203 states and 27999 transitions. [2021-12-06 21:42:10,318 INFO L78 Accepts]: Start accepts. Automaton has 23203 states and 27999 transitions. Word has length 240 [2021-12-06 21:42:10,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:42:10,318 INFO L470 AbstractCegarLoop]: Abstraction has 23203 states and 27999 transitions. [2021-12-06 21:42:10,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 2 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:10,319 INFO L276 IsEmpty]: Start isEmpty. Operand 23203 states and 27999 transitions. [2021-12-06 21:42:10,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-12-06 21:42:10,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:42:10,321 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 21:42:10,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 21:42:10,322 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:42:10,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:42:10,322 INFO L85 PathProgramCache]: Analyzing trace with hash 122588699, now seen corresponding path program 1 times [2021-12-06 21:42:10,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:42:10,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106333701] [2021-12-06 21:42:10,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:42:10,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:42:10,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:42:10,448 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:42:10,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:42:10,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106333701] [2021-12-06 21:42:10,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106333701] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:42:10,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:42:10,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:42:10,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162327359] [2021-12-06 21:42:10,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:42:10,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:42:10,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:42:10,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:42:10,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:42:10,450 INFO L87 Difference]: Start difference. First operand 23203 states and 27999 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:13,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:42:13,212 INFO L93 Difference]: Finished difference Result 57432 states and 70773 transitions. [2021-12-06 21:42:13,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:42:13,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 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 242 [2021-12-06 21:42:13,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:42:13,248 INFO L225 Difference]: With dead ends: 57432 [2021-12-06 21:42:13,248 INFO L226 Difference]: Without dead ends: 35018 [2021-12-06 21:42:13,261 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 [2021-12-06 21:42:13,262 INFO L933 BasicCegarLoop]: 809 mSDtfsCounter, 858 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2381 mSolverCounterSat, 914 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 3295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 914 IncrementalHoareTripleChecker+Valid, 2381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 21:42:13,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 926 Invalid, 3295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [914 Valid, 2381 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 21:42:13,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35018 states. [2021-12-06 21:42:13,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35018 to 33434. [2021-12-06 21:42:13,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33434 states, 33433 states have (on average 1.1907097777644842) internal successors, (39809), 33433 states have internal predecessors, (39809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:13,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33434 states to 33434 states and 39809 transitions. [2021-12-06 21:42:13,576 INFO L78 Accepts]: Start accepts. Automaton has 33434 states and 39809 transitions. Word has length 242 [2021-12-06 21:42:13,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:42:13,576 INFO L470 AbstractCegarLoop]: Abstraction has 33434 states and 39809 transitions. [2021-12-06 21:42:13,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:13,576 INFO L276 IsEmpty]: Start isEmpty. Operand 33434 states and 39809 transitions. [2021-12-06 21:42:13,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2021-12-06 21:42:13,582 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:42:13,582 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:42:13,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 21:42:13,582 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:42:13,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:42:13,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1338633442, now seen corresponding path program 1 times [2021-12-06 21:42:13,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:42:13,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768849743] [2021-12-06 21:42:13,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:42:13,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:42:13,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:42:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-06 21:42:13,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:42:13,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768849743] [2021-12-06 21:42:13,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768849743] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:42:13,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:42:13,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:42:13,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424418158] [2021-12-06 21:42:13,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:42:13,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:42:13,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:42:13,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:42:13,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:42:13,682 INFO L87 Difference]: Start difference. First operand 33434 states and 39809 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:16,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:42:16,616 INFO L93 Difference]: Finished difference Result 77893 states and 94391 transitions. [2021-12-06 21:42:16,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:42:16,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 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 331 [2021-12-06 21:42:16,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:42:16,653 INFO L225 Difference]: With dead ends: 77893 [2021-12-06 21:42:16,653 INFO L226 Difference]: Without dead ends: 45248 [2021-12-06 21:42:16,670 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 [2021-12-06 21:42:16,670 INFO L933 BasicCegarLoop]: 1796 mSDtfsCounter, 827 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2542 mSolverCounterSat, 723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 827 SdHoareTripleChecker+Valid, 1947 SdHoareTripleChecker+Invalid, 3265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 723 IncrementalHoareTripleChecker+Valid, 2542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:42:16,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [827 Valid, 1947 Invalid, 3265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [723 Valid, 2542 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 21:42:16,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45248 states. [2021-12-06 21:42:16,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45248 to 44456. [2021-12-06 21:42:17,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44456 states, 44455 states have (on average 1.165425711393544) internal successors, (51809), 44455 states have internal predecessors, (51809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:17,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44456 states to 44456 states and 51809 transitions. [2021-12-06 21:42:17,046 INFO L78 Accepts]: Start accepts. Automaton has 44456 states and 51809 transitions. Word has length 331 [2021-12-06 21:42:17,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:42:17,046 INFO L470 AbstractCegarLoop]: Abstraction has 44456 states and 51809 transitions. [2021-12-06 21:42:17,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:17,047 INFO L276 IsEmpty]: Start isEmpty. Operand 44456 states and 51809 transitions. [2021-12-06 21:42:17,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-12-06 21:42:17,051 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:42:17,051 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:42:17,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 21:42:17,051 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:42:17,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:42:17,051 INFO L85 PathProgramCache]: Analyzing trace with hash -490764898, now seen corresponding path program 1 times [2021-12-06 21:42:17,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:42:17,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412009413] [2021-12-06 21:42:17,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:42:17,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:42:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:42:17,139 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 371 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-06 21:42:17,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:42:17,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412009413] [2021-12-06 21:42:17,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412009413] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:42:17,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:42:17,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:42:17,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135933350] [2021-12-06 21:42:17,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:42:17,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:42:17,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:42:17,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:42:17,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:42:17,140 INFO L87 Difference]: Start difference. First operand 44456 states and 51809 transitions. Second operand has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:23,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:42:23,033 INFO L93 Difference]: Finished difference Result 152887 states and 179150 transitions. [2021-12-06 21:42:23,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:42:23,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 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 340 [2021-12-06 21:42:23,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:42:23,134 INFO L225 Difference]: With dead ends: 152887 [2021-12-06 21:42:23,135 INFO L226 Difference]: Without dead ends: 109220 [2021-12-06 21:42:23,154 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 [2021-12-06 21:42:23,154 INFO L933 BasicCegarLoop]: 439 mSDtfsCounter, 1741 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 6024 mSolverCounterSat, 1213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1741 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 7237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1213 IncrementalHoareTripleChecker+Valid, 6024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-06 21:42:23,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1741 Valid, 640 Invalid, 7237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1213 Valid, 6024 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-12-06 21:42:23,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109220 states. [2021-12-06 21:42:24,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109220 to 106723. [2021-12-06 21:42:24,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106723 states, 106722 states have (on average 1.1518149959708401) internal successors, (122924), 106722 states have internal predecessors, (122924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:24,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106723 states to 106723 states and 122924 transitions. [2021-12-06 21:42:24,250 INFO L78 Accepts]: Start accepts. Automaton has 106723 states and 122924 transitions. Word has length 340 [2021-12-06 21:42:24,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:42:24,251 INFO L470 AbstractCegarLoop]: Abstraction has 106723 states and 122924 transitions. [2021-12-06 21:42:24,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:24,251 INFO L276 IsEmpty]: Start isEmpty. Operand 106723 states and 122924 transitions. [2021-12-06 21:42:24,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2021-12-06 21:42:24,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:42:24,257 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 21:42:24,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 21:42:24,257 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:42:24,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:42:24,258 INFO L85 PathProgramCache]: Analyzing trace with hash 2021351561, now seen corresponding path program 1 times [2021-12-06 21:42:24,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:42:24,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284457892] [2021-12-06 21:42:24,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:42:24,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:42:24,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:42:24,430 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 288 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-06 21:42:24,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:42:24,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284457892] [2021-12-06 21:42:24,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284457892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:42:24,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:42:24,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:42:24,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282667202] [2021-12-06 21:42:24,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:42:24,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:42:24,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:42:24,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:42:24,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:42:24,432 INFO L87 Difference]: Start difference. First operand 106723 states and 122924 transitions. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 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) [2021-12-06 21:42:27,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:42:27,591 INFO L93 Difference]: Finished difference Result 199278 states and 230874 transitions. [2021-12-06 21:42:27,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:42:27,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 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 369 [2021-12-06 21:42:27,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:42:27,705 INFO L225 Difference]: With dead ends: 199278 [2021-12-06 21:42:27,706 INFO L226 Difference]: Without dead ends: 106735 [2021-12-06 21:42:27,743 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 [2021-12-06 21:42:27,744 INFO L933 BasicCegarLoop]: 1019 mSDtfsCounter, 730 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 2705 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 2709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:42:27,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [730 Valid, 1199 Invalid, 2709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2705 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 21:42:27,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106735 states. [2021-12-06 21:42:28,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106735 to 105936. [2021-12-06 21:42:28,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105936 states, 105935 states have (on average 1.152046065983858) internal successors, (122042), 105935 states have internal predecessors, (122042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:28,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105936 states to 105936 states and 122042 transitions. [2021-12-06 21:42:28,851 INFO L78 Accepts]: Start accepts. Automaton has 105936 states and 122042 transitions. Word has length 369 [2021-12-06 21:42:28,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:42:28,851 INFO L470 AbstractCegarLoop]: Abstraction has 105936 states and 122042 transitions. [2021-12-06 21:42:28,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 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) [2021-12-06 21:42:28,851 INFO L276 IsEmpty]: Start isEmpty. Operand 105936 states and 122042 transitions. [2021-12-06 21:42:28,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2021-12-06 21:42:28,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:42:28,859 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 21:42:28,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 21:42:28,859 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:42:28,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:42:28,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1007739519, now seen corresponding path program 1 times [2021-12-06 21:42:28,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:42:28,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352377527] [2021-12-06 21:42:28,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:42:28,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:42:28,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:42:29,112 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 304 proven. 113 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-06 21:42:29,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:42:29,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352377527] [2021-12-06 21:42:29,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352377527] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:42:29,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934537102] [2021-12-06 21:42:29,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:42:29,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:42:29,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:42:29,114 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:42:29,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 21:42:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:42:29,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 21:42:29,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:42:29,553 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2021-12-06 21:42:29,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:42:29,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934537102] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:42:29,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:42:29,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-06 21:42:29,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372849266] [2021-12-06 21:42:29,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:42:29,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:42:29,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:42:29,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:42:29,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:42:29,555 INFO L87 Difference]: Start difference. First operand 105936 states and 122042 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:32,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:42:32,667 INFO L93 Difference]: Finished difference Result 215001 states and 248125 transitions. [2021-12-06 21:42:32,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:42:32,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 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 398 [2021-12-06 21:42:32,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:42:32,789 INFO L225 Difference]: With dead ends: 215001 [2021-12-06 21:42:32,789 INFO L226 Difference]: Without dead ends: 122458 [2021-12-06 21:42:32,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:42:32,815 INFO L933 BasicCegarLoop]: 1754 mSDtfsCounter, 863 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 2401 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 1884 SdHoareTripleChecker+Invalid, 2865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 2401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 21:42:32,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [863 Valid, 1884 Invalid, 2865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 2401 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 21:42:32,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122458 states. [2021-12-06 21:42:33,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122458 to 114584. [2021-12-06 21:42:33,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114584 states, 114583 states have (on average 1.142377141460775) internal successors, (130897), 114583 states have internal predecessors, (130897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:34,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114584 states to 114584 states and 130897 transitions. [2021-12-06 21:42:34,074 INFO L78 Accepts]: Start accepts. Automaton has 114584 states and 130897 transitions. Word has length 398 [2021-12-06 21:42:34,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:42:34,074 INFO L470 AbstractCegarLoop]: Abstraction has 114584 states and 130897 transitions. [2021-12-06 21:42:34,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:34,075 INFO L276 IsEmpty]: Start isEmpty. Operand 114584 states and 130897 transitions. [2021-12-06 21:42:34,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2021-12-06 21:42:34,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:42:34,087 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:42:34,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 21:42:34,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 21:42:34,289 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:42:34,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:42:34,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1070237854, now seen corresponding path program 1 times [2021-12-06 21:42:34,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:42:34,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096849027] [2021-12-06 21:42:34,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:42:34,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:42:34,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:42:34,570 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 319 proven. 113 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-06 21:42:34,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:42:34,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096849027] [2021-12-06 21:42:34,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096849027] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:42:34,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721933398] [2021-12-06 21:42:34,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:42:34,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:42:34,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:42:34,572 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:42:34,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 21:42:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:42:34,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 21:42:34,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:42:35,075 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 360 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-06 21:42:35,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:42:35,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721933398] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:42:35,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:42:35,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-06 21:42:35,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682009115] [2021-12-06 21:42:35,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:42:35,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:42:35,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:42:35,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:42:35,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:42:35,078 INFO L87 Difference]: Start difference. First operand 114584 states and 130897 transitions. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:38,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:42:38,567 INFO L93 Difference]: Finished difference Result 226000 states and 261422 transitions. [2021-12-06 21:42:38,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:42:38,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 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 473 [2021-12-06 21:42:38,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:42:38,699 INFO L225 Difference]: With dead ends: 226000 [2021-12-06 21:42:38,699 INFO L226 Difference]: Without dead ends: 124809 [2021-12-06 21:42:38,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:42:38,859 INFO L933 BasicCegarLoop]: 403 mSDtfsCounter, 1140 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 2268 mSolverCounterSat, 1181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 3449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1181 IncrementalHoareTripleChecker+Valid, 2268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:42:38,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1140 Valid, 422 Invalid, 3449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1181 Valid, 2268 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-06 21:42:38,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124809 states. [2021-12-06 21:42:39,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124809 to 124809. [2021-12-06 21:42:39,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124809 states, 124808 states have (on average 1.1485081084545863) internal successors, (143343), 124808 states have internal predecessors, (143343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:39,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124809 states to 124809 states and 143343 transitions. [2021-12-06 21:42:39,995 INFO L78 Accepts]: Start accepts. Automaton has 124809 states and 143343 transitions. Word has length 473 [2021-12-06 21:42:39,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:42:39,996 INFO L470 AbstractCegarLoop]: Abstraction has 124809 states and 143343 transitions. [2021-12-06 21:42:39,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:39,996 INFO L276 IsEmpty]: Start isEmpty. Operand 124809 states and 143343 transitions. [2021-12-06 21:42:40,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2021-12-06 21:42:40,007 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:42:40,007 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-06 21:42:40,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 21:42:40,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 21:42:40,208 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:42:40,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:42:40,208 INFO L85 PathProgramCache]: Analyzing trace with hash 2122528164, now seen corresponding path program 1 times [2021-12-06 21:42:40,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:42:40,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23914131] [2021-12-06 21:42:40,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:42:40,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:42:40,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:42:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 492 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-06 21:42:40,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:42:40,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23914131] [2021-12-06 21:42:40,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23914131] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:42:40,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:42:40,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:42:40,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862650611] [2021-12-06 21:42:40,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:42:40,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:42:40,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:42:40,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:42:40,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:42:40,339 INFO L87 Difference]: Start difference. First operand 124809 states and 143343 transitions. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:43,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:42:43,913 INFO L93 Difference]: Finished difference Result 275589 states and 320317 transitions. [2021-12-06 21:42:43,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:42:43,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 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 487 [2021-12-06 21:42:43,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:42:44,098 INFO L225 Difference]: With dead ends: 275589 [2021-12-06 21:42:44,098 INFO L226 Difference]: Without dead ends: 151569 [2021-12-06 21:42:44,162 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 [2021-12-06 21:42:44,163 INFO L933 BasicCegarLoop]: 824 mSDtfsCounter, 813 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2427 mSolverCounterSat, 925 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 3352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 925 IncrementalHoareTripleChecker+Valid, 2427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 21:42:44,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [813 Valid, 907 Invalid, 3352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [925 Valid, 2427 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 21:42:44,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151569 states. [2021-12-06 21:42:45,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151569 to 149973. [2021-12-06 21:42:45,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149973 states, 149972 states have (on average 1.151368255407676) internal successors, (172673), 149972 states have internal predecessors, (172673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:45,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149973 states to 149973 states and 172673 transitions. [2021-12-06 21:42:45,901 INFO L78 Accepts]: Start accepts. Automaton has 149973 states and 172673 transitions. Word has length 487 [2021-12-06 21:42:45,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:42:45,901 INFO L470 AbstractCegarLoop]: Abstraction has 149973 states and 172673 transitions. [2021-12-06 21:42:45,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:45,901 INFO L276 IsEmpty]: Start isEmpty. Operand 149973 states and 172673 transitions. [2021-12-06 21:42:45,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2021-12-06 21:42:45,912 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:42:45,912 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 21:42:45,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 21:42:45,912 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:42:45,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:42:45,913 INFO L85 PathProgramCache]: Analyzing trace with hash -169297695, now seen corresponding path program 1 times [2021-12-06 21:42:45,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:42:45,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433722004] [2021-12-06 21:42:45,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:42:45,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:42:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:42:46,033 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 476 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-06 21:42:46,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:42:46,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433722004] [2021-12-06 21:42:46,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433722004] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:42:46,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:42:46,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:42:46,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501704551] [2021-12-06 21:42:46,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:42:46,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:42:46,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:42:46,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:42:46,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:42:46,035 INFO L87 Difference]: Start difference. First operand 149973 states and 172673 transitions. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:49,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:42:49,422 INFO L93 Difference]: Finished difference Result 299944 states and 345291 transitions. [2021-12-06 21:42:49,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:42:49,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 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 491 [2021-12-06 21:42:49,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:42:49,579 INFO L225 Difference]: With dead ends: 299944 [2021-12-06 21:42:49,580 INFO L226 Difference]: Without dead ends: 149184 [2021-12-06 21:42:49,640 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 [2021-12-06 21:42:49,641 INFO L933 BasicCegarLoop]: 1698 mSDtfsCounter, 736 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2493 mSolverCounterSat, 667 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 1840 SdHoareTripleChecker+Invalid, 3160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 667 IncrementalHoareTripleChecker+Valid, 2493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:42:49,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [736 Valid, 1840 Invalid, 3160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [667 Valid, 2493 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 21:42:49,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149184 states. [2021-12-06 21:42:51,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149184 to 149163. [2021-12-06 21:42:51,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149163 states, 149162 states have (on average 1.1098403078532066) internal successors, (165546), 149162 states have internal predecessors, (165546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:51,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149163 states to 149163 states and 165546 transitions. [2021-12-06 21:42:51,434 INFO L78 Accepts]: Start accepts. Automaton has 149163 states and 165546 transitions. Word has length 491 [2021-12-06 21:42:51,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:42:51,435 INFO L470 AbstractCegarLoop]: Abstraction has 149163 states and 165546 transitions. [2021-12-06 21:42:51,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:51,435 INFO L276 IsEmpty]: Start isEmpty. Operand 149163 states and 165546 transitions. [2021-12-06 21:42:51,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2021-12-06 21:42:51,444 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:42:51,445 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 21:42:51,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 21:42:51,445 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:42:51,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:42:51,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1723753840, now seen corresponding path program 1 times [2021-12-06 21:42:51,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:42:51,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396739911] [2021-12-06 21:42:51,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:42:51,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:42:51,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:42:51,621 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-06 21:42:51,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:42:51,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396739911] [2021-12-06 21:42:51,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396739911] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:42:51,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:42:51,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:42:51,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736357510] [2021-12-06 21:42:51,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:42:51,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:42:51,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:42:51,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:42:51,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:42:51,624 INFO L87 Difference]: Start difference. First operand 149163 states and 165546 transitions. Second operand has 4 states, 4 states have (on average 99.25) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:57,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:42:57,163 INFO L93 Difference]: Finished difference Result 333003 states and 372453 transitions. [2021-12-06 21:42:57,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:42:57,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 99.25) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 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 491 [2021-12-06 21:42:57,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:42:57,398 INFO L225 Difference]: With dead ends: 333003 [2021-12-06 21:42:57,398 INFO L226 Difference]: Without dead ends: 199590 [2021-12-06 21:42:57,464 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 [2021-12-06 21:42:57,465 INFO L933 BasicCegarLoop]: 664 mSDtfsCounter, 1380 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 5610 mSolverCounterSat, 573 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1380 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 6183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 573 IncrementalHoareTripleChecker+Valid, 5610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-06 21:42:57,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1380 Valid, 984 Invalid, 6183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [573 Valid, 5610 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-06 21:42:57,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199590 states. [2021-12-06 21:42:59,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199590 to 180670. [2021-12-06 21:42:59,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180670 states, 180669 states have (on average 1.1079598602970073) internal successors, (200174), 180669 states have internal predecessors, (200174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:59,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180670 states to 180670 states and 200174 transitions. [2021-12-06 21:42:59,417 INFO L78 Accepts]: Start accepts. Automaton has 180670 states and 200174 transitions. Word has length 491 [2021-12-06 21:42:59,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:42:59,418 INFO L470 AbstractCegarLoop]: Abstraction has 180670 states and 200174 transitions. [2021-12-06 21:42:59,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.25) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:42:59,418 INFO L276 IsEmpty]: Start isEmpty. Operand 180670 states and 200174 transitions. [2021-12-06 21:42:59,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 630 [2021-12-06 21:42:59,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:42:59,442 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:42:59,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 21:42:59,442 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:42:59,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:42:59,442 INFO L85 PathProgramCache]: Analyzing trace with hash -121411440, now seen corresponding path program 1 times [2021-12-06 21:42:59,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:42:59,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60633950] [2021-12-06 21:42:59,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:42:59,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:42:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:42:59,585 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 687 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-12-06 21:42:59,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:42:59,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60633950] [2021-12-06 21:42:59,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60633950] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:42:59,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:42:59,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:42:59,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621463127] [2021-12-06 21:42:59,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:42:59,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:42:59,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:42:59,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:42:59,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:42:59,588 INFO L87 Difference]: Start difference. First operand 180670 states and 200174 transitions. Second operand has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:43:03,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:43:03,937 INFO L93 Difference]: Finished difference Result 410178 states and 456557 transitions. [2021-12-06 21:43:03,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:43:03,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 629 [2021-12-06 21:43:03,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:43:04,245 INFO L225 Difference]: With dead ends: 410178 [2021-12-06 21:43:04,245 INFO L226 Difference]: Without dead ends: 245259 [2021-12-06 21:43:04,328 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 [2021-12-06 21:43:04,328 INFO L933 BasicCegarLoop]: 614 mSDtfsCounter, 969 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2451 mSolverCounterSat, 937 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 969 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 3388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 937 IncrementalHoareTripleChecker+Valid, 2451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:43:04,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [969 Valid, 697 Invalid, 3388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [937 Valid, 2451 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-06 21:43:04,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245259 states. [2021-12-06 21:43:06,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245259 to 245254. [2021-12-06 21:43:06,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245254 states, 245253 states have (on average 1.09681838754266) internal successors, (268998), 245253 states have internal predecessors, (268998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:43:06,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245254 states to 245254 states and 268998 transitions. [2021-12-06 21:43:06,830 INFO L78 Accepts]: Start accepts. Automaton has 245254 states and 268998 transitions. Word has length 629 [2021-12-06 21:43:06,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:43:06,831 INFO L470 AbstractCegarLoop]: Abstraction has 245254 states and 268998 transitions. [2021-12-06 21:43:06,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:43:06,831 INFO L276 IsEmpty]: Start isEmpty. Operand 245254 states and 268998 transitions. [2021-12-06 21:43:06,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 649 [2021-12-06 21:43:06,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:43:06,850 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2021-12-06 21:43:06,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 21:43:06,851 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:43:06,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:43:06,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1291286212, now seen corresponding path program 1 times [2021-12-06 21:43:06,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:43:06,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633865052] [2021-12-06 21:43:06,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:06,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:43:06,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-12-06 21:43:06,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:43:06,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633865052] [2021-12-06 21:43:06,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633865052] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:43:06,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:43:06,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:43:06,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714745539] [2021-12-06 21:43:06,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:43:06,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:43:06,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:43:06,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:43:06,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:43:06,987 INFO L87 Difference]: Start difference. First operand 245254 states and 268998 transitions. Second operand has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:43:11,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:43:11,336 INFO L93 Difference]: Finished difference Result 490522 states and 537993 transitions. [2021-12-06 21:43:11,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:43:11,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 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 648 [2021-12-06 21:43:11,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:43:11,622 INFO L225 Difference]: With dead ends: 490522 [2021-12-06 21:43:11,622 INFO L226 Difference]: Without dead ends: 246057 [2021-12-06 21:43:11,702 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 [2021-12-06 21:43:11,702 INFO L933 BasicCegarLoop]: 1374 mSDtfsCounter, 923 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 2454 mSolverCounterSat, 588 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 1458 SdHoareTripleChecker+Invalid, 3042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 588 IncrementalHoareTripleChecker+Valid, 2454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:43:11,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [923 Valid, 1458 Invalid, 3042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [588 Valid, 2454 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-06 21:43:11,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246057 states. [2021-12-06 21:43:13,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246057 to 244465. [2021-12-06 21:43:14,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244465 states, 244464 states have (on average 1.0802694875319065) internal successors, (264087), 244464 states have internal predecessors, (264087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:43:14,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244465 states to 244465 states and 264087 transitions. [2021-12-06 21:43:14,401 INFO L78 Accepts]: Start accepts. Automaton has 244465 states and 264087 transitions. Word has length 648 [2021-12-06 21:43:14,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:43:14,402 INFO L470 AbstractCegarLoop]: Abstraction has 244465 states and 264087 transitions. [2021-12-06 21:43:14,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:43:14,402 INFO L276 IsEmpty]: Start isEmpty. Operand 244465 states and 264087 transitions. [2021-12-06 21:43:14,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2021-12-06 21:43:14,427 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:43:14,427 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 21:43:14,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 21:43:14,427 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:43:14,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:43:14,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1796947750, now seen corresponding path program 1 times [2021-12-06 21:43:14,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:43:14,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211170164] [2021-12-06 21:43:14,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:14,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:43:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:14,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 919 proven. 0 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2021-12-06 21:43:14,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:43:14,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211170164] [2021-12-06 21:43:14,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211170164] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:43:14,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:43:14,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:43:14,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830403672] [2021-12-06 21:43:14,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:43:14,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:43:14,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:43:14,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:43:14,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:43:14,624 INFO L87 Difference]: Start difference. First operand 244465 states and 264087 transitions. Second operand has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:43:18,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:43:18,125 INFO L93 Difference]: Finished difference Result 486563 states and 525500 transitions. [2021-12-06 21:43:18,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:43:18,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 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 678 [2021-12-06 21:43:18,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:43:18,423 INFO L225 Difference]: With dead ends: 486563 [2021-12-06 21:43:18,423 INFO L226 Difference]: Without dead ends: 242887 [2021-12-06 21:43:18,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:43:18,495 INFO L933 BasicCegarLoop]: 1332 mSDtfsCounter, 1003 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2409 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1003 SdHoareTripleChecker+Valid, 1409 SdHoareTripleChecker+Invalid, 2849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 2409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:43:18,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1003 Valid, 1409 Invalid, 2849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 2409 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-06 21:43:18,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242887 states. [2021-12-06 21:43:20,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242887 to 242098. [2021-12-06 21:43:20,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242098 states, 242097 states have (on average 1.0582080736233823) internal successors, (256189), 242097 states have internal predecessors, (256189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:43:21,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242098 states to 242098 states and 256189 transitions. [2021-12-06 21:43:21,056 INFO L78 Accepts]: Start accepts. Automaton has 242098 states and 256189 transitions. Word has length 678 [2021-12-06 21:43:21,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:43:21,057 INFO L470 AbstractCegarLoop]: Abstraction has 242098 states and 256189 transitions. [2021-12-06 21:43:21,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:43:21,057 INFO L276 IsEmpty]: Start isEmpty. Operand 242098 states and 256189 transitions. [2021-12-06 21:43:21,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 694 [2021-12-06 21:43:21,085 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:43:21,086 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 21:43:21,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 21:43:21,086 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:43:21,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:43:21,087 INFO L85 PathProgramCache]: Analyzing trace with hash -556349304, now seen corresponding path program 1 times [2021-12-06 21:43:21,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:43:21,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317642486] [2021-12-06 21:43:21,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:21,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:43:21,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:21,459 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 556 proven. 110 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-12-06 21:43:21,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:43:21,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317642486] [2021-12-06 21:43:21,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317642486] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:43:21,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92890326] [2021-12-06 21:43:21,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:21,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:43:21,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:43:21,460 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:43:21,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 21:43:21,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:21,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 21:43:21,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:43:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 542 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2021-12-06 21:43:22,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:43:22,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92890326] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:43:22,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:43:22,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-06 21:43:22,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18048124] [2021-12-06 21:43:22,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:43:22,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:43:22,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:43:22,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:43:22,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:43:22,516 INFO L87 Difference]: Start difference. First operand 242098 states and 256189 transitions. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 2 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:43:26,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:43:26,005 INFO L93 Difference]: Finished difference Result 477129 states and 505252 transitions. [2021-12-06 21:43:26,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:43:26,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 2 states have internal predecessors, (457), 0 states have call successors, (0), 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 693 [2021-12-06 21:43:26,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:43:26,282 INFO L225 Difference]: With dead ends: 477129 [2021-12-06 21:43:26,282 INFO L226 Difference]: Without dead ends: 248417 [2021-12-06 21:43:26,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 692 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:43:26,491 INFO L933 BasicCegarLoop]: 970 mSDtfsCounter, 616 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 2413 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 2522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 21:43:26,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 1100 Invalid, 2522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2413 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 21:43:26,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248417 states. [2021-12-06 21:43:28,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248417 to 248404. [2021-12-06 21:43:28,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248404 states, 248403 states have (on average 1.051955894252485) internal successors, (261309), 248403 states have internal predecessors, (261309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:43:29,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248404 states to 248404 states and 261309 transitions. [2021-12-06 21:43:29,169 INFO L78 Accepts]: Start accepts. Automaton has 248404 states and 261309 transitions. Word has length 693 [2021-12-06 21:43:29,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:43:29,170 INFO L470 AbstractCegarLoop]: Abstraction has 248404 states and 261309 transitions. [2021-12-06 21:43:29,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 2 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:43:29,170 INFO L276 IsEmpty]: Start isEmpty. Operand 248404 states and 261309 transitions. [2021-12-06 21:43:29,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2021-12-06 21:43:29,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:43:29,195 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 21:43:29,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 21:43:29,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 21:43:29,397 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:43:29,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:43:29,399 INFO L85 PathProgramCache]: Analyzing trace with hash -627115892, now seen corresponding path program 1 times [2021-12-06 21:43:29,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:43:29,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601321073] [2021-12-06 21:43:29,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:29,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:43:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:29,591 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 678 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-06 21:43:29,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:43:29,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601321073] [2021-12-06 21:43:29,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601321073] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:43:29,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:43:29,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:43:29,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634269880] [2021-12-06 21:43:29,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:43:29,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:43:29,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:43:29,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:43:29,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:43:29,593 INFO L87 Difference]: Start difference. First operand 248404 states and 261309 transitions. Second operand has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:43:33,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:43:33,182 INFO L93 Difference]: Finished difference Result 492840 states and 518387 transitions. [2021-12-06 21:43:33,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:43:33,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 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 775 [2021-12-06 21:43:33,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:43:33,564 INFO L225 Difference]: With dead ends: 492840 [2021-12-06 21:43:33,564 INFO L226 Difference]: Without dead ends: 242862 [2021-12-06 21:43:33,642 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 [2021-12-06 21:43:33,643 INFO L933 BasicCegarLoop]: 1422 mSDtfsCounter, 998 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2285 mSolverCounterSat, 519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 998 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 2804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 2285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 21:43:33,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [998 Valid, 1544 Invalid, 2804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [519 Valid, 2285 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 21:43:33,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242862 states. [2021-12-06 21:43:35,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242862 to 234980. [2021-12-06 21:43:35,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234980 states, 234979 states have (on average 1.0383225735065686) internal successors, (243984), 234979 states have internal predecessors, (243984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:43:36,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234980 states to 234980 states and 243984 transitions. [2021-12-06 21:43:36,192 INFO L78 Accepts]: Start accepts. Automaton has 234980 states and 243984 transitions. Word has length 775 [2021-12-06 21:43:36,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:43:36,192 INFO L470 AbstractCegarLoop]: Abstraction has 234980 states and 243984 transitions. [2021-12-06 21:43:36,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:43:36,192 INFO L276 IsEmpty]: Start isEmpty. Operand 234980 states and 243984 transitions. [2021-12-06 21:43:36,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 781 [2021-12-06 21:43:36,214 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:43:36,215 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 21:43:36,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 21:43:36,215 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:43:36,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:43:36,216 INFO L85 PathProgramCache]: Analyzing trace with hash 633978856, now seen corresponding path program 1 times [2021-12-06 21:43:36,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:43:36,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912159137] [2021-12-06 21:43:36,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:36,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:43:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:36,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 1114 proven. 0 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2021-12-06 21:43:36,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:43:36,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912159137] [2021-12-06 21:43:36,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912159137] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:43:36,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:43:36,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:43:36,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853015493] [2021-12-06 21:43:36,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:43:36,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:43:36,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:43:36,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:43:36,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:43:36,528 INFO L87 Difference]: Start difference. First operand 234980 states and 243984 transitions. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:43:39,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:43:39,648 INFO L93 Difference]: Finished difference Result 461301 states and 479271 transitions. [2021-12-06 21:43:39,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:43:39,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 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 780 [2021-12-06 21:43:39,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:43:39,997 INFO L225 Difference]: With dead ends: 461301 [2021-12-06 21:43:39,997 INFO L226 Difference]: Without dead ends: 240495 [2021-12-06 21:43:40,064 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 [2021-12-06 21:43:40,064 INFO L933 BasicCegarLoop]: 1683 mSDtfsCounter, 721 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 2377 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 1814 SdHoareTripleChecker+Invalid, 2449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:43:40,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [721 Valid, 1814 Invalid, 2449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2377 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 21:43:40,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240495 states. [2021-12-06 21:43:42,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240495 to 240489. [2021-12-06 21:43:42,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240489 states, 240488 states have (on average 1.037694188483417) internal successors, (249553), 240488 states have internal predecessors, (249553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:43:42,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240489 states to 240489 states and 249553 transitions. [2021-12-06 21:43:42,613 INFO L78 Accepts]: Start accepts. Automaton has 240489 states and 249553 transitions. Word has length 780 [2021-12-06 21:43:42,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:43:42,613 INFO L470 AbstractCegarLoop]: Abstraction has 240489 states and 249553 transitions. [2021-12-06 21:43:42,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:43:42,613 INFO L276 IsEmpty]: Start isEmpty. Operand 240489 states and 249553 transitions. [2021-12-06 21:43:42,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 827 [2021-12-06 21:43:42,638 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:43:42,639 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:43:42,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 21:43:42,639 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:43:42,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:43:42,639 INFO L85 PathProgramCache]: Analyzing trace with hash -250793400, now seen corresponding path program 1 times [2021-12-06 21:43:42,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:43:42,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033724871] [2021-12-06 21:43:42,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:42,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:43:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 1233 proven. 0 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2021-12-06 21:43:42,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:43:42,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033724871] [2021-12-06 21:43:42,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033724871] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:43:42,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:43:42,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:43:42,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53403369] [2021-12-06 21:43:42,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:43:42,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:43:42,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:43:42,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:43:42,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:43:42,981 INFO L87 Difference]: Start difference. First operand 240489 states and 249553 transitions. Second operand has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:43:46,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:43:46,371 INFO L93 Difference]: Finished difference Result 468400 states and 486324 transitions. [2021-12-06 21:43:46,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:43:46,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 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 826 [2021-12-06 21:43:46,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:43:46,722 INFO L225 Difference]: With dead ends: 468400 [2021-12-06 21:43:46,723 INFO L226 Difference]: Without dead ends: 240503 [2021-12-06 21:43:46,794 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 [2021-12-06 21:43:46,794 INFO L933 BasicCegarLoop]: 1597 mSDtfsCounter, 702 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2410 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 2537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 2410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 21:43:46,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [702 Valid, 1726 Invalid, 2537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 2410 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 21:43:46,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240503 states. [2021-12-06 21:43:48,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240503 to 237333. [2021-12-06 21:43:49,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237333 states, 237332 states have (on average 1.034727723189456) internal successors, (245574), 237332 states have internal predecessors, (245574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:43:49,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237333 states to 237333 states and 245574 transitions. [2021-12-06 21:43:49,297 INFO L78 Accepts]: Start accepts. Automaton has 237333 states and 245574 transitions. Word has length 826 [2021-12-06 21:43:49,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:43:49,298 INFO L470 AbstractCegarLoop]: Abstraction has 237333 states and 245574 transitions. [2021-12-06 21:43:49,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:43:49,298 INFO L276 IsEmpty]: Start isEmpty. Operand 237333 states and 245574 transitions. [2021-12-06 21:43:49,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 852 [2021-12-06 21:43:49,323 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:43:49,324 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 21:43:49,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 21:43:49,324 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:43:49,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:43:49,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1451084436, now seen corresponding path program 1 times [2021-12-06 21:43:49,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:43:49,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966645531] [2021-12-06 21:43:49,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:49,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:43:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:49,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 791 proven. 0 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-12-06 21:43:49,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:43:49,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966645531] [2021-12-06 21:43:49,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966645531] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:43:49,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:43:49,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:43:49,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495697027] [2021-12-06 21:43:49,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:43:49,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:43:49,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:43:49,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:43:49,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:43:49,565 INFO L87 Difference]: Start difference. First operand 237333 states and 245574 transitions. Second operand has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:43:53,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:43:53,636 INFO L93 Difference]: Finished difference Result 499889 states and 518067 transitions. [2021-12-06 21:43:53,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:43:53,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 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 851 [2021-12-06 21:43:53,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:43:53,943 INFO L225 Difference]: With dead ends: 499889 [2021-12-06 21:43:53,943 INFO L226 Difference]: Without dead ends: 276730 [2021-12-06 21:43:54,028 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 [2021-12-06 21:43:54,028 INFO L933 BasicCegarLoop]: 487 mSDtfsCounter, 777 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 2300 mSolverCounterSat, 888 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 3188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 888 IncrementalHoareTripleChecker+Valid, 2300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:43:54,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [777 Valid, 553 Invalid, 3188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [888 Valid, 2300 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-06 21:43:54,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276730 states. [2021-12-06 21:43:56,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276730 to 236548. [2021-12-06 21:43:56,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236548 states, 236547 states have (on average 1.0342003914655438) internal successors, (244637), 236547 states have internal predecessors, (244637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:43:56,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236548 states to 236548 states and 244637 transitions. [2021-12-06 21:43:56,877 INFO L78 Accepts]: Start accepts. Automaton has 236548 states and 244637 transitions. Word has length 851 [2021-12-06 21:43:56,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:43:56,878 INFO L470 AbstractCegarLoop]: Abstraction has 236548 states and 244637 transitions. [2021-12-06 21:43:56,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:43:56,878 INFO L276 IsEmpty]: Start isEmpty. Operand 236548 states and 244637 transitions. [2021-12-06 21:43:56,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 866 [2021-12-06 21:43:56,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:43:56,903 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 21:43:56,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 21:43:56,903 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:43:56,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:43:56,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1351827814, now seen corresponding path program 1 times [2021-12-06 21:43:56,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:43:56,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089304374] [2021-12-06 21:43:56,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:43:56,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:43:56,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:43:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 1042 trivial. 0 not checked. [2021-12-06 21:43:57,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:43:57,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089304374] [2021-12-06 21:43:57,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089304374] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:43:57,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:43:57,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:43:57,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458375658] [2021-12-06 21:43:57,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:43:57,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:43:57,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:43:57,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:43:57,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:43:57,144 INFO L87 Difference]: Start difference. First operand 236548 states and 244637 transitions. Second operand has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 2 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:43:59,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:43:59,856 INFO L93 Difference]: Finished difference Result 457331 states and 473213 transitions. [2021-12-06 21:43:59,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:43:59,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 2 states have internal predecessors, (413), 0 states have call successors, (0), 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 865 [2021-12-06 21:43:59,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:44:00,113 INFO L225 Difference]: With dead ends: 457331 [2021-12-06 21:44:00,113 INFO L226 Difference]: Without dead ends: 234956 [2021-12-06 21:44:00,295 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 [2021-12-06 21:44:00,295 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 1307 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1307 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 1430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 21:44:00,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1307 Valid, 258 Invalid, 1430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1418 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 21:44:00,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234956 states. [2021-12-06 21:44:02,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234956 to 234955. [2021-12-06 21:44:02,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234955 states, 234954 states have (on average 1.0339896320130748) internal successors, (242940), 234954 states have internal predecessors, (242940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:44:02,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234955 states to 234955 states and 242940 transitions. [2021-12-06 21:44:02,736 INFO L78 Accepts]: Start accepts. Automaton has 234955 states and 242940 transitions. Word has length 865 [2021-12-06 21:44:02,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:44:02,737 INFO L470 AbstractCegarLoop]: Abstraction has 234955 states and 242940 transitions. [2021-12-06 21:44:02,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 2 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:44:02,737 INFO L276 IsEmpty]: Start isEmpty. Operand 234955 states and 242940 transitions. [2021-12-06 21:44:02,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 924 [2021-12-06 21:44:02,766 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:44:02,767 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 21:44:02,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 21:44:02,767 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:44:02,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:44:02,767 INFO L85 PathProgramCache]: Analyzing trace with hash 535574343, now seen corresponding path program 1 times [2021-12-06 21:44:02,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:44:02,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808768801] [2021-12-06 21:44:02,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:44:02,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:44:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:44:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 932 proven. 0 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2021-12-06 21:44:02,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:44:02,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808768801] [2021-12-06 21:44:02,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808768801] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:44:02,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:44:02,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:44:02,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975455228] [2021-12-06 21:44:02,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:44:02,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:44:02,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:44:02,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:44:02,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:44:02,990 INFO L87 Difference]: Start difference. First operand 234955 states and 242940 transitions. Second operand has 4 states, 4 states have (on average 133.75) internal successors, (535), 4 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:44:09,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:44:09,744 INFO L93 Difference]: Finished difference Result 597597 states and 618051 transitions. [2021-12-06 21:44:09,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:44:09,745 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 133.75) internal successors, (535), 4 states have internal predecessors, (535), 0 states have call successors, (0), 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 923 [2021-12-06 21:44:09,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:44:10,145 INFO L225 Difference]: With dead ends: 597597 [2021-12-06 21:44:10,145 INFO L226 Difference]: Without dead ends: 363431 [2021-12-06 21:44:10,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:44:10,244 INFO L933 BasicCegarLoop]: 563 mSDtfsCounter, 1678 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 5887 mSolverCounterSat, 937 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1678 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 6824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 937 IncrementalHoareTripleChecker+Valid, 5887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:44:10,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1678 Valid, 796 Invalid, 6824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [937 Valid, 5887 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-12-06 21:44:10,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363431 states. [2021-12-06 21:44:13,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363431 to 342037. [2021-12-06 21:44:13,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342037 states, 342036 states have (on average 1.03075992000842) internal successors, (352557), 342036 states have internal predecessors, (352557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:44:14,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342037 states to 342037 states and 352557 transitions. [2021-12-06 21:44:14,028 INFO L78 Accepts]: Start accepts. Automaton has 342037 states and 352557 transitions. Word has length 923 [2021-12-06 21:44:14,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:44:14,028 INFO L470 AbstractCegarLoop]: Abstraction has 342037 states and 352557 transitions. [2021-12-06 21:44:14,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 133.75) internal successors, (535), 4 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:44:14,028 INFO L276 IsEmpty]: Start isEmpty. Operand 342037 states and 352557 transitions. [2021-12-06 21:44:14,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 937 [2021-12-06 21:44:14,061 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:44:14,062 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 21:44:14,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 21:44:14,062 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:44:14,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:44:14,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1434218087, now seen corresponding path program 1 times [2021-12-06 21:44:14,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:44:14,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632642004] [2021-12-06 21:44:14,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:44:14,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:44:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:44:14,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1608 backedges. 1122 proven. 0 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2021-12-06 21:44:14,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:44:14,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632642004] [2021-12-06 21:44:14,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632642004] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:44:14,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:44:14,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:44:14,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101613153] [2021-12-06 21:44:14,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:44:14,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:44:14,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:44:14,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:44:14,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:44:14,308 INFO L87 Difference]: Start difference. First operand 342037 states and 352557 transitions. Second operand has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:44:18,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:44:18,592 INFO L93 Difference]: Finished difference Result 671481 states and 692037 transitions. [2021-12-06 21:44:18,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:44:18,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 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 936 [2021-12-06 21:44:18,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:44:18,942 INFO L225 Difference]: With dead ends: 671481 [2021-12-06 21:44:18,942 INFO L226 Difference]: Without dead ends: 327081 [2021-12-06 21:44:19,037 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 [2021-12-06 21:44:19,038 INFO L933 BasicCegarLoop]: 1547 mSDtfsCounter, 609 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 2575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:44:19,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [609 Valid, 1661 Invalid, 2575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 21:44:19,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327081 states. [2021-12-06 21:44:21,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327081 to 316019. [2021-12-06 21:44:22,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316019 states, 316018 states have (on average 1.0254827256675252) internal successors, (324071), 316018 states have internal predecessors, (324071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:44:22,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316019 states to 316019 states and 324071 transitions. [2021-12-06 21:44:22,561 INFO L78 Accepts]: Start accepts. Automaton has 316019 states and 324071 transitions. Word has length 936 [2021-12-06 21:44:22,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:44:22,561 INFO L470 AbstractCegarLoop]: Abstraction has 316019 states and 324071 transitions. [2021-12-06 21:44:22,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:44:22,562 INFO L276 IsEmpty]: Start isEmpty. Operand 316019 states and 324071 transitions. [2021-12-06 21:44:22,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 996 [2021-12-06 21:44:22,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:44:22,594 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 21:44:22,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 21:44:22,595 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:44:22,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:44:22,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1066958883, now seen corresponding path program 1 times [2021-12-06 21:44:22,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:44:22,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489397104] [2021-12-06 21:44:22,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:44:22,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:44:22,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:44:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1188 backedges. 675 proven. 200 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2021-12-06 21:44:22,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:44:22,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489397104] [2021-12-06 21:44:22,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489397104] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:44:22,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163167478] [2021-12-06 21:44:22,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:44:22,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:44:22,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:44:22,867 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:44:22,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 21:44:23,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:44:23,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 1203 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 21:44:23,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:44:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1188 backedges. 670 proven. 0 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2021-12-06 21:44:23,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:44:23,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163167478] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:44:23,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:44:23,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-06 21:44:23,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80752964] [2021-12-06 21:44:23,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:44:23,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:44:23,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:44:23,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:44:23,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:44:23,874 INFO L87 Difference]: Start difference. First operand 316019 states and 324071 transitions. Second operand has 4 states, 4 states have (on average 157.25) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:44:30,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:44:30,535 INFO L93 Difference]: Finished difference Result 661257 states and 678046 transitions. [2021-12-06 21:44:30,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:44:30,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 157.25) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 995 [2021-12-06 21:44:30,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:44:31,048 INFO L225 Difference]: With dead ends: 661257 [2021-12-06 21:44:31,048 INFO L226 Difference]: Without dead ends: 356260 [2021-12-06 21:44:31,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 997 GetRequests, 993 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:44:31,139 INFO L933 BasicCegarLoop]: 518 mSDtfsCounter, 1620 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 5178 mSolverCounterSat, 623 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1620 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 5801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 623 IncrementalHoareTripleChecker+Valid, 5178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:44:31,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1620 Valid, 667 Invalid, 5801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [623 Valid, 5178 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-12-06 21:44:31,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356260 states. [2021-12-06 21:44:34,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356260 to 339640. [2021-12-06 21:44:34,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339640 states, 339639 states have (on average 1.0252945038702859) internal successors, (348230), 339639 states have internal predecessors, (348230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:44:34,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339640 states to 339640 states and 348230 transitions. [2021-12-06 21:44:34,869 INFO L78 Accepts]: Start accepts. Automaton has 339640 states and 348230 transitions. Word has length 995 [2021-12-06 21:44:34,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:44:34,869 INFO L470 AbstractCegarLoop]: Abstraction has 339640 states and 348230 transitions. [2021-12-06 21:44:34,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.25) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:44:34,869 INFO L276 IsEmpty]: Start isEmpty. Operand 339640 states and 348230 transitions. [2021-12-06 21:44:34,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1109 [2021-12-06 21:44:34,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:44:34,901 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:44:34,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 21:44:35,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:44:35,103 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:44:35,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:44:35,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1961260091, now seen corresponding path program 1 times [2021-12-06 21:44:35,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:44:35,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529278002] [2021-12-06 21:44:35,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:44:35,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:44:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:44:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1308 backedges. 786 proven. 0 refuted. 0 times theorem prover too weak. 522 trivial. 0 not checked. [2021-12-06 21:44:35,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:44:35,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529278002] [2021-12-06 21:44:35,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529278002] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:44:35,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:44:35,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:44:35,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73595515] [2021-12-06 21:44:35,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:44:35,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:44:35,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:44:35,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:44:35,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:44:35,458 INFO L87 Difference]: Start difference. First operand 339640 states and 348230 transitions. Second operand has 3 states, 3 states have (on average 229.33333333333334) internal successors, (688), 3 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:44:40,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:44:40,371 INFO L93 Difference]: Finished difference Result 669017 states and 686353 transitions. [2021-12-06 21:44:40,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:44:40,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 229.33333333333334) internal successors, (688), 3 states have internal predecessors, (688), 0 states have call successors, (0), 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 1108 [2021-12-06 21:44:40,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:44:40,750 INFO L225 Difference]: With dead ends: 669017 [2021-12-06 21:44:40,751 INFO L226 Difference]: Without dead ends: 346697 [2021-12-06 21:44:40,844 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 [2021-12-06 21:44:40,845 INFO L933 BasicCegarLoop]: 431 mSDtfsCounter, 745 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 2223 mSolverCounterSat, 847 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 3070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 847 IncrementalHoareTripleChecker+Valid, 2223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:44:40,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [745 Valid, 478 Invalid, 3070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [847 Valid, 2223 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-06 21:44:41,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346697 states. [2021-12-06 21:44:43,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346697 to 313602. [2021-12-06 21:44:44,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313602 states, 313601 states have (on average 1.0243812998045287) internal successors, (321247), 313601 states have internal predecessors, (321247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:44:44,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313602 states to 313602 states and 321247 transitions. [2021-12-06 21:44:44,473 INFO L78 Accepts]: Start accepts. Automaton has 313602 states and 321247 transitions. Word has length 1108 [2021-12-06 21:44:44,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:44:44,473 INFO L470 AbstractCegarLoop]: Abstraction has 313602 states and 321247 transitions. [2021-12-06 21:44:44,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 229.33333333333334) internal successors, (688), 3 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:44:44,474 INFO L276 IsEmpty]: Start isEmpty. Operand 313602 states and 321247 transitions. [2021-12-06 21:44:44,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1263 [2021-12-06 21:44:44,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:44:44,523 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:44:44,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-06 21:44:44,524 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:44:44,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:44:44,524 INFO L85 PathProgramCache]: Analyzing trace with hash 880776303, now seen corresponding path program 1 times [2021-12-06 21:44:44,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:44:44,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211012342] [2021-12-06 21:44:44,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:44:44,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:44:44,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:44:44,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1644 backedges. 1508 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-12-06 21:44:44,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:44:44,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211012342] [2021-12-06 21:44:44,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211012342] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:44:44,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:44:44,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:44:44,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57626015] [2021-12-06 21:44:44,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:44:44,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:44:44,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:44:44,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:44:44,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:44:44,865 INFO L87 Difference]: Start difference. First operand 313602 states and 321247 transitions. Second operand has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:44:49,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:44:49,685 INFO L93 Difference]: Finished difference Result 610679 states and 625797 transitions. [2021-12-06 21:44:49,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:44:49,686 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 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 1262 [2021-12-06 21:44:49,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:44:50,025 INFO L225 Difference]: With dead ends: 610679 [2021-12-06 21:44:50,025 INFO L226 Difference]: Without dead ends: 314397 [2021-12-06 21:44:50,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:44:50,246 INFO L933 BasicCegarLoop]: 1363 mSDtfsCounter, 1463 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 5313 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1463 SdHoareTripleChecker+Valid, 1594 SdHoareTripleChecker+Invalid, 5531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 5313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-06 21:44:50,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1463 Valid, 1594 Invalid, 5531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 5313 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-06 21:44:50,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314397 states. [2021-12-06 21:44:53,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314397 to 311241. [2021-12-06 21:44:53,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311241 states, 311240 states have (on average 1.0242128261148953) internal successors, (318776), 311240 states have internal predecessors, (318776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:44:53,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311241 states to 311241 states and 318776 transitions. [2021-12-06 21:44:53,487 INFO L78 Accepts]: Start accepts. Automaton has 311241 states and 318776 transitions. Word has length 1262 [2021-12-06 21:44:53,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:44:53,488 INFO L470 AbstractCegarLoop]: Abstraction has 311241 states and 318776 transitions. [2021-12-06 21:44:53,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:44:53,488 INFO L276 IsEmpty]: Start isEmpty. Operand 311241 states and 318776 transitions. [2021-12-06 21:44:53,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1265 [2021-12-06 21:44:53,716 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:44:53,716 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:44:53,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-06 21:44:53,716 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:44:53,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:44:53,717 INFO L85 PathProgramCache]: Analyzing trace with hash 183619479, now seen corresponding path program 1 times [2021-12-06 21:44:53,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:44:53,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701617564] [2021-12-06 21:44:53,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:44:53,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:44:53,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:44:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1456 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 1291 trivial. 0 not checked. [2021-12-06 21:44:54,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:44:54,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701617564] [2021-12-06 21:44:54,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701617564] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:44:54,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:44:54,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:44:54,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050225964] [2021-12-06 21:44:54,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:44:54,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:44:54,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:44:54,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:44:54,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:44:54,100 INFO L87 Difference]: Start difference. First operand 311241 states and 318776 transitions. Second operand has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:44:58,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:44:58,267 INFO L93 Difference]: Finished difference Result 630371 states and 645790 transitions. [2021-12-06 21:44:58,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:44:58,268 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 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 1264 [2021-12-06 21:44:58,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:44:58,632 INFO L225 Difference]: With dead ends: 630371 [2021-12-06 21:44:58,632 INFO L226 Difference]: Without dead ends: 336450 [2021-12-06 21:44:58,741 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 [2021-12-06 21:44:58,741 INFO L933 BasicCegarLoop]: 1418 mSDtfsCounter, 832 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 2586 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 1539 SdHoareTripleChecker+Invalid, 2802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 2586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 21:44:58,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 1539 Invalid, 2802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 2586 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 21:44:59,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336450 states. [2021-12-06 21:45:01,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336450 to 313604. [2021-12-06 21:45:01,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313604 states, 313603 states have (on average 1.0241356109475994) internal successors, (321172), 313603 states have internal predecessors, (321172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:45:02,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313604 states to 313604 states and 321172 transitions. [2021-12-06 21:45:02,305 INFO L78 Accepts]: Start accepts. Automaton has 313604 states and 321172 transitions. Word has length 1264 [2021-12-06 21:45:02,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:45:02,306 INFO L470 AbstractCegarLoop]: Abstraction has 313604 states and 321172 transitions. [2021-12-06 21:45:02,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:45:02,306 INFO L276 IsEmpty]: Start isEmpty. Operand 313604 states and 321172 transitions. [2021-12-06 21:45:02,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1267 [2021-12-06 21:45:02,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:45:02,357 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:45:02,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-06 21:45:02,357 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:45:02,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:45:02,357 INFO L85 PathProgramCache]: Analyzing trace with hash -385427110, now seen corresponding path program 1 times [2021-12-06 21:45:02,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:45:02,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191033450] [2021-12-06 21:45:02,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:02,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:45:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:45:02,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2648 backedges. 1788 proven. 0 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2021-12-06 21:45:02,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:45:02,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191033450] [2021-12-06 21:45:02,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191033450] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:45:02,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:45:02,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:45:02,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436515018] [2021-12-06 21:45:02,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:45:02,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:45:02,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:45:02,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:45:02,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:45:02,712 INFO L87 Difference]: Start difference. First operand 313604 states and 321172 transitions. Second operand has 3 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:45:08,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:45:08,097 INFO L93 Difference]: Finished difference Result 670589 states and 687199 transitions. [2021-12-06 21:45:08,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:45:08,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 0 states have call successors, (0), 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 1266 [2021-12-06 21:45:08,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:45:08,536 INFO L225 Difference]: With dead ends: 670589 [2021-12-06 21:45:08,536 INFO L226 Difference]: Without dead ends: 374305 [2021-12-06 21:45:08,801 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 [2021-12-06 21:45:08,802 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 869 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 2589 mSolverCounterSat, 721 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 3310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 721 IncrementalHoareTripleChecker+Valid, 2589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-06 21:45:08,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [869 Valid, 336 Invalid, 3310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [721 Valid, 2589 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-12-06 21:45:09,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374305 states. [2021-12-06 21:45:11,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374305 to 328565. [2021-12-06 21:45:11,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328565 states, 328564 states have (on average 1.02432402819542) internal successors, (336556), 328564 states have internal predecessors, (336556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:45:12,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328565 states to 328565 states and 336556 transitions. [2021-12-06 21:45:12,558 INFO L78 Accepts]: Start accepts. Automaton has 328565 states and 336556 transitions. Word has length 1266 [2021-12-06 21:45:12,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:45:12,558 INFO L470 AbstractCegarLoop]: Abstraction has 328565 states and 336556 transitions. [2021-12-06 21:45:12,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:45:12,558 INFO L276 IsEmpty]: Start isEmpty. Operand 328565 states and 336556 transitions. [2021-12-06 21:45:12,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1280 [2021-12-06 21:45:12,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:45:12,611 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:45:12,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-06 21:45:12,612 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:45:12,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:45:12,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1277467045, now seen corresponding path program 1 times [2021-12-06 21:45:12,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:45:12,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852429409] [2021-12-06 21:45:12,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:12,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:45:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:45:12,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1637 backedges. 840 proven. 201 refuted. 0 times theorem prover too weak. 596 trivial. 0 not checked. [2021-12-06 21:45:12,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:45:12,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852429409] [2021-12-06 21:45:12,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852429409] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:45:12,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278361222] [2021-12-06 21:45:12,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:12,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:12,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:45:12,993 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:45:12,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 21:45:13,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:45:13,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 1494 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 21:45:13,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:45:14,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1637 backedges. 1119 proven. 0 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2021-12-06 21:45:14,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:45:14,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278361222] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:45:14,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:45:14,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-06 21:45:14,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558621530] [2021-12-06 21:45:14,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:45:14,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:45:14,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:45:14,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:45:14,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:45:14,386 INFO L87 Difference]: Start difference. First operand 328565 states and 336556 transitions. Second operand has 4 states, 4 states have (on average 228.25) internal successors, (913), 3 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:45:21,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:45:21,170 INFO L93 Difference]: Finished difference Result 687954 states and 704838 transitions. [2021-12-06 21:45:21,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:45:21,171 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 228.25) internal successors, (913), 3 states have internal predecessors, (913), 0 states have call successors, (0), 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 1279 [2021-12-06 21:45:21,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:45:21,744 INFO L225 Difference]: With dead ends: 687954 [2021-12-06 21:45:21,744 INFO L226 Difference]: Without dead ends: 371985 [2021-12-06 21:45:21,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1281 GetRequests, 1277 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:45:21,839 INFO L933 BasicCegarLoop]: 576 mSDtfsCounter, 1336 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 5399 mSolverCounterSat, 745 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1336 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 6144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 745 IncrementalHoareTripleChecker+Valid, 5399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:45:21,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1336 Valid, 749 Invalid, 6144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [745 Valid, 5399 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-12-06 21:45:22,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371985 states. [2021-12-06 21:45:24,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371985 to 343523. [2021-12-06 21:45:25,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343523 states, 343522 states have (on average 1.0241061707838217) internal successors, (351803), 343522 states have internal predecessors, (351803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:45:25,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343523 states to 343523 states and 351803 transitions. [2021-12-06 21:45:25,640 INFO L78 Accepts]: Start accepts. Automaton has 343523 states and 351803 transitions. Word has length 1279 [2021-12-06 21:45:25,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:45:25,641 INFO L470 AbstractCegarLoop]: Abstraction has 343523 states and 351803 transitions. [2021-12-06 21:45:25,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 228.25) internal successors, (913), 3 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:45:25,641 INFO L276 IsEmpty]: Start isEmpty. Operand 343523 states and 351803 transitions. [2021-12-06 21:45:25,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1286 [2021-12-06 21:45:25,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:45:25,682 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:45:25,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 21:45:25,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:25,884 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:45:25,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:45:25,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1927066356, now seen corresponding path program 1 times [2021-12-06 21:45:25,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:45:25,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869430725] [2021-12-06 21:45:25,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:25,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:45:26,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:45:26,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 2119 proven. 0 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2021-12-06 21:45:26,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:45:26,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869430725] [2021-12-06 21:45:26,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869430725] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:45:26,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:45:26,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:45:26,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528748468] [2021-12-06 21:45:26,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:45:26,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:45:26,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:45:26,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:45:26,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:45:26,283 INFO L87 Difference]: Start difference. First operand 343523 states and 351803 transitions. Second operand has 4 states, 4 states have (on average 226.25) internal successors, (905), 4 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:45:30,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:45:30,683 INFO L93 Difference]: Finished difference Result 671302 states and 687703 transitions. [2021-12-06 21:45:30,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:45:30,684 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 226.25) internal successors, (905), 4 states have internal predecessors, (905), 0 states have call successors, (0), 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 1285 [2021-12-06 21:45:30,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:45:31,050 INFO L225 Difference]: With dead ends: 671302 [2021-12-06 21:45:31,050 INFO L226 Difference]: Without dead ends: 341949 [2021-12-06 21:45:31,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:45:31,163 INFO L933 BasicCegarLoop]: 1360 mSDtfsCounter, 1589 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 4078 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1589 SdHoareTripleChecker+Valid, 1520 SdHoareTripleChecker+Invalid, 4323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 4078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-06 21:45:31,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1589 Valid, 1520 Invalid, 4323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 4078 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-06 21:45:31,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341949 states. [2021-12-06 21:45:34,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341949 to 338799. [2021-12-06 21:45:34,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338799 states, 338798 states have (on average 1.0233383904273343) internal successors, (346705), 338798 states have internal predecessors, (346705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:45:34,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338799 states to 338799 states and 346705 transitions. [2021-12-06 21:45:34,883 INFO L78 Accepts]: Start accepts. Automaton has 338799 states and 346705 transitions. Word has length 1285 [2021-12-06 21:45:34,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:45:34,884 INFO L470 AbstractCegarLoop]: Abstraction has 338799 states and 346705 transitions. [2021-12-06 21:45:34,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 226.25) internal successors, (905), 4 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:45:34,884 INFO L276 IsEmpty]: Start isEmpty. Operand 338799 states and 346705 transitions. [2021-12-06 21:45:34,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1346 [2021-12-06 21:45:34,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:45:34,936 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 21:45:34,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-06 21:45:34,937 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:45:34,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:45:34,937 INFO L85 PathProgramCache]: Analyzing trace with hash 329148303, now seen corresponding path program 1 times [2021-12-06 21:45:34,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:45:34,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809481521] [2021-12-06 21:45:34,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:34,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:45:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:45:35,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2524 backedges. 1155 proven. 0 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2021-12-06 21:45:35,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:45:35,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809481521] [2021-12-06 21:45:35,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809481521] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:45:35,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:45:35,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:45:35,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196227626] [2021-12-06 21:45:35,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:45:35,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:45:35,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:45:35,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:45:35,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:45:35,346 INFO L87 Difference]: Start difference. First operand 338799 states and 346705 transitions. Second operand has 4 states, 4 states have (on average 172.75) internal successors, (691), 4 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:45:41,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:45:41,230 INFO L93 Difference]: Finished difference Result 699666 states and 716020 transitions. [2021-12-06 21:45:41,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:45:41,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 172.75) internal successors, (691), 4 states have internal predecessors, (691), 0 states have call successors, (0), 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 1345 [2021-12-06 21:45:41,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:45:41,643 INFO L225 Difference]: With dead ends: 699666 [2021-12-06 21:45:41,643 INFO L226 Difference]: Without dead ends: 377400 [2021-12-06 21:45:41,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:45:41,748 INFO L933 BasicCegarLoop]: 387 mSDtfsCounter, 1561 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 5635 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1561 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 6331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 5635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:45:41,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1561 Valid, 615 Invalid, 6331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 5635 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-12-06 21:45:42,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377400 states. [2021-12-06 21:45:44,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377400 to 341159. [2021-12-06 21:45:45,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341159 states, 341158 states have (on average 1.0220542974223088) internal successors, (348682), 341158 states have internal predecessors, (348682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:45:45,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341159 states to 341159 states and 348682 transitions. [2021-12-06 21:45:45,682 INFO L78 Accepts]: Start accepts. Automaton has 341159 states and 348682 transitions. Word has length 1345 [2021-12-06 21:45:45,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:45:45,683 INFO L470 AbstractCegarLoop]: Abstraction has 341159 states and 348682 transitions. [2021-12-06 21:45:45,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 172.75) internal successors, (691), 4 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:45:45,683 INFO L276 IsEmpty]: Start isEmpty. Operand 341159 states and 348682 transitions. [2021-12-06 21:45:45,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1351 [2021-12-06 21:45:45,734 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:45:45,734 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:45:45,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-06 21:45:45,735 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:45:45,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:45:45,735 INFO L85 PathProgramCache]: Analyzing trace with hash 825264259, now seen corresponding path program 1 times [2021-12-06 21:45:45,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:45:45,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961847554] [2021-12-06 21:45:45,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:45,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:45:45,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:45:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2021-12-06 21:45:46,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:45:46,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961847554] [2021-12-06 21:45:46,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961847554] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:45:46,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:45:46,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:45:46,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3188306] [2021-12-06 21:45:46,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:45:46,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:45:46,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:45:46,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:45:46,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:45:46,152 INFO L87 Difference]: Start difference. First operand 341159 states and 348682 transitions. Second operand has 3 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:45:50,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:45:50,934 INFO L93 Difference]: Finished difference Result 708347 states and 724182 transitions. [2021-12-06 21:45:50,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:45:50,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 0 states have call successors, (0), 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 1350 [2021-12-06 21:45:50,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:45:51,329 INFO L225 Difference]: With dead ends: 708347 [2021-12-06 21:45:51,329 INFO L226 Difference]: Without dead ends: 373488 [2021-12-06 21:45:51,428 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 [2021-12-06 21:45:51,428 INFO L933 BasicCegarLoop]: 412 mSDtfsCounter, 941 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 2488 mSolverCounterSat, 727 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 3215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 727 IncrementalHoareTripleChecker+Valid, 2488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:45:51,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [941 Valid, 447 Invalid, 3215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [727 Valid, 2488 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-06 21:45:51,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373488 states. [2021-12-06 21:45:54,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373488 to 358467. [2021-12-06 21:45:54,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358467 states, 358466 states have (on average 1.0223201084621694) internal successors, (366467), 358466 states have internal predecessors, (366467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:45:55,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358467 states to 358467 states and 366467 transitions. [2021-12-06 21:45:55,576 INFO L78 Accepts]: Start accepts. Automaton has 358467 states and 366467 transitions. Word has length 1350 [2021-12-06 21:45:55,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:45:55,577 INFO L470 AbstractCegarLoop]: Abstraction has 358467 states and 366467 transitions. [2021-12-06 21:45:55,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 261.0) internal successors, (783), 3 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:45:55,577 INFO L276 IsEmpty]: Start isEmpty. Operand 358467 states and 366467 transitions. [2021-12-06 21:45:55,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1365 [2021-12-06 21:45:55,627 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:45:55,628 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:45:55,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-06 21:45:55,628 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:45:55,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:45:55,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1515077132, now seen corresponding path program 1 times [2021-12-06 21:45:55,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:45:55,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938507142] [2021-12-06 21:45:55,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:55,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:45:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:45:56,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2974 backedges. 2289 proven. 166 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2021-12-06 21:45:56,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:45:56,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938507142] [2021-12-06 21:45:56,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938507142] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:45:56,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905016177] [2021-12-06 21:45:56,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:45:56,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:45:56,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:45:56,011 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:45:56,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 21:45:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:45:56,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 1639 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 21:45:56,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:45:57,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2974 backedges. 2171 proven. 0 refuted. 0 times theorem prover too weak. 803 trivial. 0 not checked. [2021-12-06 21:45:57,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:45:57,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905016177] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:45:57,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:45:57,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-06 21:45:57,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917832457] [2021-12-06 21:45:57,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:45:57,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:45:57,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:45:57,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:45:57,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:45:57,305 INFO L87 Difference]: Start difference. First operand 358467 states and 366467 transitions. Second operand has 3 states, 3 states have (on average 271.6666666666667) internal successors, (815), 3 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:46:01,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:01,397 INFO L93 Difference]: Finished difference Result 759495 states and 776634 transitions. [2021-12-06 21:46:01,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:46:01,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 271.6666666666667) internal successors, (815), 3 states have internal predecessors, (815), 0 states have call successors, (0), 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 1364 [2021-12-06 21:46:01,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:01,873 INFO L225 Difference]: With dead ends: 759495 [2021-12-06 21:46:01,873 INFO L226 Difference]: Without dead ends: 411265 [2021-12-06 21:46:02,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1367 GetRequests, 1364 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:46:02,200 INFO L933 BasicCegarLoop]: 1474 mSDtfsCounter, 750 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 2393 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 1600 SdHoareTripleChecker+Invalid, 2513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:02,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [750 Valid, 1600 Invalid, 2513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2393 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 21:46:02,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411265 states. [2021-12-06 21:46:05,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411265 to 402578. [2021-12-06 21:46:06,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402578 states, 402577 states have (on average 1.0218840122510724) internal successors, (411387), 402577 states have internal predecessors, (411387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:46:06,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402578 states to 402578 states and 411387 transitions. [2021-12-06 21:46:06,556 INFO L78 Accepts]: Start accepts. Automaton has 402578 states and 411387 transitions. Word has length 1364 [2021-12-06 21:46:06,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:06,557 INFO L470 AbstractCegarLoop]: Abstraction has 402578 states and 411387 transitions. [2021-12-06 21:46:06,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 271.6666666666667) internal successors, (815), 3 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:46:06,558 INFO L276 IsEmpty]: Start isEmpty. Operand 402578 states and 411387 transitions. [2021-12-06 21:46:06,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1372 [2021-12-06 21:46:06,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:06,612 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:06,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 21:46:06,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0070369-b82c-4285-aa71-90c8134bb21e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-06 21:46:06,815 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:46:06,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:06,817 INFO L85 PathProgramCache]: Analyzing trace with hash -412379290, now seen corresponding path program 1 times [2021-12-06 21:46:06,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:06,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352646174] [2021-12-06 21:46:06,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:06,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3119 backedges. 1637 proven. 0 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2021-12-06 21:46:07,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:07,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352646174] [2021-12-06 21:46:07,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352646174] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:07,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:07,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:46:07,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327035880] [2021-12-06 21:46:07,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:07,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:46:07,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:07,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:46:07,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:46:07,490 INFO L87 Difference]: Start difference. First operand 402578 states and 411387 transitions. Second operand has 4 states, 4 states have (on average 171.5) internal successors, (686), 4 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:46:14,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:46:14,276 INFO L93 Difference]: Finished difference Result 890283 states and 910509 transitions. [2021-12-06 21:46:14,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:46:14,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 171.5) internal successors, (686), 4 states have internal predecessors, (686), 0 states have call successors, (0), 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 1371 [2021-12-06 21:46:14,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:46:14,853 INFO L225 Difference]: With dead ends: 890283 [2021-12-06 21:46:14,853 INFO L226 Difference]: Without dead ends: 495579 [2021-12-06 21:46:15,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:46:15,004 INFO L933 BasicCegarLoop]: 394 mSDtfsCounter, 1617 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 4871 mSolverCounterSat, 1022 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1617 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 5893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1022 IncrementalHoareTripleChecker+Valid, 4871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-06 21:46:15,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1617 Valid, 568 Invalid, 5893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1022 Valid, 4871 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-12-06 21:46:15,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495579 states. [2021-12-06 21:46:19,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495579 to 463244. [2021-12-06 21:46:19,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463244 states, 463243 states have (on average 1.0232772000872112) internal successors, (474026), 463243 states have internal predecessors, (474026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:46:20,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463244 states to 463244 states and 474026 transitions. [2021-12-06 21:46:20,602 INFO L78 Accepts]: Start accepts. Automaton has 463244 states and 474026 transitions. Word has length 1371 [2021-12-06 21:46:20,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:46:20,603 INFO L470 AbstractCegarLoop]: Abstraction has 463244 states and 474026 transitions. [2021-12-06 21:46:20,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 171.5) internal successors, (686), 4 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:46:20,603 INFO L276 IsEmpty]: Start isEmpty. Operand 463244 states and 474026 transitions. [2021-12-06 21:46:20,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1558 [2021-12-06 21:46:20,697 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:46:20,698 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:46:20,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-06 21:46:20,698 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:46:20,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:46:20,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1772153664, now seen corresponding path program 1 times [2021-12-06 21:46:20,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:46:20,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512449346] [2021-12-06 21:46:20,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:46:20,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:46:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:46:21,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3412 backedges. 1723 proven. 0 refuted. 0 times theorem prover too weak. 1689 trivial. 0 not checked. [2021-12-06 21:46:21,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:46:21,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512449346] [2021-12-06 21:46:21,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512449346] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:46:21,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:46:21,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:46:21,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836747422] [2021-12-06 21:46:21,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:46:21,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:46:21,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:46:21,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:46:21,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:46:21,225 INFO L87 Difference]: Start difference. First operand 463244 states and 474026 transitions. Second operand has 4 states, 4 states have (on average 185.25) internal successors, (741), 4 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)