./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label13.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321f7f5-16b5-4636-8bfd-8ef11b189901/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321f7f5-16b5-4636-8bfd-8ef11b189901/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321f7f5-16b5-4636-8bfd-8ef11b189901/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321f7f5-16b5-4636-8bfd-8ef11b189901/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label13.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321f7f5-16b5-4636-8bfd-8ef11b189901/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321f7f5-16b5-4636-8bfd-8ef11b189901/bin/uautomizer-ZsLfNo2U6R --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 84be5ebe7d0e17b7dfbf14426aab6d066d24416ef8e3b409c38a918132f4bf30 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 16:57:34,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 16:57:34,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 16:57:34,908 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 16:57:34,909 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 16:57:34,910 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 16:57:34,912 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 16:57:34,914 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 16:57:34,916 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 16:57:34,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 16:57:34,919 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 16:57:34,921 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 16:57:34,921 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 16:57:34,923 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 16:57:34,924 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 16:57:34,925 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 16:57:34,926 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 16:57:34,928 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 16:57:34,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 16:57:34,932 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 16:57:34,934 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 16:57:34,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 16:57:34,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 16:57:34,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 16:57:34,941 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 16:57:34,942 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 16:57:34,943 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 16:57:34,944 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 16:57:34,944 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 16:57:34,945 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 16:57:34,946 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 16:57:34,947 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 16:57:34,948 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 16:57:34,949 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 16:57:34,950 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 16:57:34,950 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 16:57:34,951 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 16:57:34,952 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 16:57:34,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 16:57:34,953 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 16:57:34,954 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 16:57:34,955 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321f7f5-16b5-4636-8bfd-8ef11b189901/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 16:57:34,979 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 16:57:34,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 16:57:34,980 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 16:57:34,980 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 16:57:34,981 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 16:57:34,981 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 16:57:34,982 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 16:57:34,982 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 16:57:34,983 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 16:57:34,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 16:57:34,983 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 16:57:34,983 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 16:57:34,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 16:57:34,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 16:57:34,984 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 16:57:34,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 16:57:34,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 16:57:34,985 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 16:57:34,985 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 16:57:34,986 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 16:57:34,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 16:57:34,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 16:57:34,986 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 16:57:34,987 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 16:57:34,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:57:34,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 16:57:34,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 16:57:34,988 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 16:57:34,988 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 16:57:34,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 16:57:34,989 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 16:57:34,989 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 16:57:34,989 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 16:57:34,989 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 16:57:34,990 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_7321f7f5-16b5-4636-8bfd-8ef11b189901/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321f7f5-16b5-4636-8bfd-8ef11b189901/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 84be5ebe7d0e17b7dfbf14426aab6d066d24416ef8e3b409c38a918132f4bf30 [2022-11-25 16:57:35,324 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 16:57:35,367 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 16:57:35,370 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 16:57:35,371 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 16:57:35,372 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 16:57:35,373 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321f7f5-16b5-4636-8bfd-8ef11b189901/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/eca-rers2012/Problem17_label13.c [2022-11-25 16:57:38,811 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 16:57:39,344 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 16:57:39,345 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321f7f5-16b5-4636-8bfd-8ef11b189901/sv-benchmarks/c/eca-rers2012/Problem17_label13.c [2022-11-25 16:57:39,375 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321f7f5-16b5-4636-8bfd-8ef11b189901/bin/uautomizer-ZsLfNo2U6R/data/57b0b8a2e/9cc91a34bad74fbb801458bcf619a0ea/FLAGb61e3b65a [2022-11-25 16:57:39,395 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321f7f5-16b5-4636-8bfd-8ef11b189901/bin/uautomizer-ZsLfNo2U6R/data/57b0b8a2e/9cc91a34bad74fbb801458bcf619a0ea [2022-11-25 16:57:39,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 16:57:39,402 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 16:57:39,407 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 16:57:39,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 16:57:39,411 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 16:57:39,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:57:39" (1/1) ... [2022-11-25 16:57:39,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1be51a49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:57:39, skipping insertion in model container [2022-11-25 16:57:39,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:57:39" (1/1) ... [2022-11-25 16:57:39,422 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 16:57:39,555 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 16:57:39,788 WARN L237 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_7321f7f5-16b5-4636-8bfd-8ef11b189901/sv-benchmarks/c/eca-rers2012/Problem17_label13.c[4647,4660] [2022-11-25 16:57:40,721 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:57:40,737 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 16:57:40,777 WARN L237 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_7321f7f5-16b5-4636-8bfd-8ef11b189901/sv-benchmarks/c/eca-rers2012/Problem17_label13.c[4647,4660] [2022-11-25 16:57:41,140 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:57:41,163 INFO L208 MainTranslator]: Completed translation [2022-11-25 16:57:41,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:57:41 WrapperNode [2022-11-25 16:57:41,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 16:57:41,165 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 16:57:41,166 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 16:57:41,166 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 16:57:41,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:57:41" (1/1) ... [2022-11-25 16:57:41,238 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:57:41" (1/1) ... [2022-11-25 16:57:41,748 INFO L138 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2022-11-25 16:57:41,749 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 16:57:41,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 16:57:41,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 16:57:41,751 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 16:57:41,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:57:41" (1/1) ... [2022-11-25 16:57:41,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:57:41" (1/1) ... [2022-11-25 16:57:41,797 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:57:41" (1/1) ... [2022-11-25 16:57:41,798 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:57:41" (1/1) ... [2022-11-25 16:57:41,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:57:41" (1/1) ... [2022-11-25 16:57:41,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:57:41" (1/1) ... [2022-11-25 16:57:41,972 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:57:41" (1/1) ... [2022-11-25 16:57:41,985 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:57:41" (1/1) ... [2022-11-25 16:57:42,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 16:57:42,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 16:57:42,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 16:57:42,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 16:57:42,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:57:41" (1/1) ... [2022-11-25 16:57:42,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:57:42,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321f7f5-16b5-4636-8bfd-8ef11b189901/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:57:42,067 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321f7f5-16b5-4636-8bfd-8ef11b189901/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 16:57:42,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321f7f5-16b5-4636-8bfd-8ef11b189901/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 16:57:42,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 16:57:42,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 16:57:42,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 16:57:42,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 16:57:42,214 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 16:57:42,217 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 16:57:46,915 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 16:57:46,929 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 16:57:46,929 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 16:57:46,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:57:46 BoogieIcfgContainer [2022-11-25 16:57:46,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 16:57:46,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 16:57:46,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 16:57:46,939 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 16:57:46,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 04:57:39" (1/3) ... [2022-11-25 16:57:46,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@335f12d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:57:46, skipping insertion in model container [2022-11-25 16:57:46,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:57:41" (2/3) ... [2022-11-25 16:57:46,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@335f12d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:57:46, skipping insertion in model container [2022-11-25 16:57:46,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:57:46" (3/3) ... [2022-11-25 16:57:46,943 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label13.c [2022-11-25 16:57:46,965 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 16:57:46,965 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 16:57:47,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:57:47,048 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@14bb4547, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:57:47,049 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 16:57:47,056 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:57:47,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 16:57:47,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:57:47,064 INFO L195 NwaCegarLoop]: 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] [2022-11-25 16:57:47,064 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:57:47,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:57:47,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1722039382, now seen corresponding path program 1 times [2022-11-25 16:57:47,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:57:47,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308811440] [2022-11-25 16:57:47,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:57:47,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:57:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:57:47,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:57:47,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:57:47,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308811440] [2022-11-25 16:57:47,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308811440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:57:47,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:57:47,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:57:47,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283847280] [2022-11-25 16:57:47,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:57:47,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:57:47,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:57:47,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:57:47,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:57:47,608 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:57:52,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:57:52,558 INFO L93 Difference]: Finished difference Result 1667 states and 3061 transitions. [2022-11-25 16:57:52,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:57:52,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2022-11-25 16:57:52,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:57:52,580 INFO L225 Difference]: With dead ends: 1667 [2022-11-25 16:57:52,580 INFO L226 Difference]: Without dead ends: 998 [2022-11-25 16:57:52,585 INFO L412 NwaCegarLoop]: 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 [2022-11-25 16:57:52,589 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 515 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-25 16:57:52,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 276 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-25 16:57:52,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-11-25 16:57:52,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 982. [2022-11-25 16:57:52,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 1.707441386340469) internal successors, (1675), 981 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:57:52,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1675 transitions. [2022-11-25 16:57:52,680 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1675 transitions. Word has length 30 [2022-11-25 16:57:52,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:57:52,680 INFO L495 AbstractCegarLoop]: Abstraction has 982 states and 1675 transitions. [2022-11-25 16:57:52,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:57:52,681 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1675 transitions. [2022-11-25 16:57:52,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-25 16:57:52,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:57:52,684 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:57:52,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 16:57:52,685 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:57:52,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:57:52,685 INFO L85 PathProgramCache]: Analyzing trace with hash 673698151, now seen corresponding path program 1 times [2022-11-25 16:57:52,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:57:52,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546713590] [2022-11-25 16:57:52,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:57:52,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:57:52,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:57:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:57:52,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:57:52,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546713590] [2022-11-25 16:57:52,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546713590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:57:52,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:57:52,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:57:52,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812620070] [2022-11-25 16:57:52,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:57:52,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:57:52,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:57:52,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:57:52,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:57:52,929 INFO L87 Difference]: Start difference. First operand 982 states and 1675 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:57:56,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:57:56,628 INFO L93 Difference]: Finished difference Result 2841 states and 4881 transitions. [2022-11-25 16:57:56,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:57:56,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2022-11-25 16:57:56,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:57:56,637 INFO L225 Difference]: With dead ends: 2841 [2022-11-25 16:57:56,637 INFO L226 Difference]: Without dead ends: 1861 [2022-11-25 16:57:56,640 INFO L412 NwaCegarLoop]: 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 [2022-11-25 16:57:56,641 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 407 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-25 16:57:56,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 496 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-25 16:57:56,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2022-11-25 16:57:56,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1857. [2022-11-25 16:57:56,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 1.4547413793103448) internal successors, (2700), 1856 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:57:56,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2700 transitions. [2022-11-25 16:57:56,705 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2700 transitions. Word has length 95 [2022-11-25 16:57:56,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:57:56,705 INFO L495 AbstractCegarLoop]: Abstraction has 1857 states and 2700 transitions. [2022-11-25 16:57:56,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:57:56,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2700 transitions. [2022-11-25 16:57:56,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-25 16:57:56,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:57:56,711 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:57:56,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 16:57:56,711 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:57:56,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:57:56,712 INFO L85 PathProgramCache]: Analyzing trace with hash -2095642724, now seen corresponding path program 1 times [2022-11-25 16:57:56,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:57:56,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252564696] [2022-11-25 16:57:56,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:57:56,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:57:56,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:57:57,361 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:57:57,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:57:57,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252564696] [2022-11-25 16:57:57,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252564696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:57:57,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:57:57,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:57:57,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950717563] [2022-11-25 16:57:57,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:57:57,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:57:57,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:57:57,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:57:57,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:57:57,366 INFO L87 Difference]: Start difference. First operand 1857 states and 2700 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:01,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:58:01,632 INFO L93 Difference]: Finished difference Result 4591 states and 6640 transitions. [2022-11-25 16:58:01,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:58:01,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 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 135 [2022-11-25 16:58:01,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:58:01,647 INFO L225 Difference]: With dead ends: 4591 [2022-11-25 16:58:01,647 INFO L226 Difference]: Without dead ends: 2736 [2022-11-25 16:58:01,655 INFO L412 NwaCegarLoop]: 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 [2022-11-25 16:58:01,659 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 352 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:58:01,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 537 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-25 16:58:01,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2022-11-25 16:58:01,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2716. [2022-11-25 16:58:01,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2715 states have (on average 1.390791896869245) internal successors, (3776), 2715 states have internal predecessors, (3776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:01,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 3776 transitions. [2022-11-25 16:58:01,729 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 3776 transitions. Word has length 135 [2022-11-25 16:58:01,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:58:01,730 INFO L495 AbstractCegarLoop]: Abstraction has 2716 states and 3776 transitions. [2022-11-25 16:58:01,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:01,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 3776 transitions. [2022-11-25 16:58:01,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-25 16:58:01,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:58:01,746 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:58:01,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 16:58:01,747 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:58:01,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:01,748 INFO L85 PathProgramCache]: Analyzing trace with hash -767813459, now seen corresponding path program 1 times [2022-11-25 16:58:01,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:01,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324500002] [2022-11-25 16:58:01,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:01,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:01,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:02,071 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:02,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:02,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324500002] [2022-11-25 16:58:02,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324500002] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:58:02,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:58:02,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:58:02,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104910777] [2022-11-25 16:58:02,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:58:02,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:58:02,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:02,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:58:02,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:58:02,076 INFO L87 Difference]: Start difference. First operand 2716 states and 3776 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) [2022-11-25 16:58:05,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:58:05,170 INFO L93 Difference]: Finished difference Result 6709 states and 9429 transitions. [2022-11-25 16:58:05,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:58:05,172 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 141 [2022-11-25 16:58:05,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:58:05,188 INFO L225 Difference]: With dead ends: 6709 [2022-11-25 16:58:05,188 INFO L226 Difference]: Without dead ends: 3995 [2022-11-25 16:58:05,192 INFO L412 NwaCegarLoop]: 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 [2022-11-25 16:58:05,194 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 347 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:58:05,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-25 16:58:05,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3995 states. [2022-11-25 16:58:05,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3995 to 3142. [2022-11-25 16:58:05,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3142 states, 3141 states have (on average 1.274434893346068) internal successors, (4003), 3141 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:05,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 4003 transitions. [2022-11-25 16:58:05,272 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 4003 transitions. Word has length 141 [2022-11-25 16:58:05,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:58:05,273 INFO L495 AbstractCegarLoop]: Abstraction has 3142 states and 4003 transitions. [2022-11-25 16:58:05,273 INFO L496 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) [2022-11-25 16:58:05,274 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 4003 transitions. [2022-11-25 16:58:05,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-11-25 16:58:05,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:58:05,276 INFO L195 NwaCegarLoop]: 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-25 16:58:05,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 16:58:05,277 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:58:05,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:05,278 INFO L85 PathProgramCache]: Analyzing trace with hash -513035753, now seen corresponding path program 1 times [2022-11-25 16:58:05,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:05,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523924093] [2022-11-25 16:58:05,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:05,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:05,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:05,936 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:05,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:05,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523924093] [2022-11-25 16:58:05,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523924093] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:58:05,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:58:05,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 16:58:05,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254680556] [2022-11-25 16:58:05,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:58:05,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:58:05,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:05,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:58:05,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:58:05,944 INFO L87 Difference]: Start difference. First operand 3142 states and 4003 transitions. Second operand has 5 states, 5 states have (on average 35.6) internal successors, (178), 5 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:10,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:58:10,200 INFO L93 Difference]: Finished difference Result 8019 states and 10522 transitions. [2022-11-25 16:58:10,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:58:10,201 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.6) internal successors, (178), 5 states have internal predecessors, (178), 0 states have call successors, (0), 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 178 [2022-11-25 16:58:10,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:58:10,218 INFO L225 Difference]: With dead ends: 8019 [2022-11-25 16:58:10,218 INFO L226 Difference]: Without dead ends: 4879 [2022-11-25 16:58:10,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:58:10,223 INFO L413 NwaCegarLoop]: 756 mSDtfsCounter, 1095 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 1990 mSolverCounterSat, 811 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 2801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 811 IncrementalHoareTripleChecker+Valid, 1990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:58:10,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1095 Valid, 881 Invalid, 2801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [811 Valid, 1990 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-25 16:58:10,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4879 states. [2022-11-25 16:58:10,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4879 to 4852. [2022-11-25 16:58:10,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4852 states, 4851 states have (on average 1.2665429808286952) internal successors, (6144), 4851 states have internal predecessors, (6144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:10,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4852 states to 4852 states and 6144 transitions. [2022-11-25 16:58:10,334 INFO L78 Accepts]: Start accepts. Automaton has 4852 states and 6144 transitions. Word has length 178 [2022-11-25 16:58:10,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:58:10,335 INFO L495 AbstractCegarLoop]: Abstraction has 4852 states and 6144 transitions. [2022-11-25 16:58:10,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.6) internal successors, (178), 5 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:10,335 INFO L276 IsEmpty]: Start isEmpty. Operand 4852 states and 6144 transitions. [2022-11-25 16:58:10,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-11-25 16:58:10,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:58:10,338 INFO L195 NwaCegarLoop]: 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-25 16:58:10,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 16:58:10,339 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:58:10,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:10,341 INFO L85 PathProgramCache]: Analyzing trace with hash 185887176, now seen corresponding path program 1 times [2022-11-25 16:58:10,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:10,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23798047] [2022-11-25 16:58:10,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:10,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:10,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:10,600 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-25 16:58:10,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:10,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23798047] [2022-11-25 16:58:10,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23798047] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:58:10,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:58:10,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:58:10,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690344797] [2022-11-25 16:58:10,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:58:10,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:58:10,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:10,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:58:10,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:58:10,605 INFO L87 Difference]: Start difference. First operand 4852 states and 6144 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:14,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:58:14,234 INFO L93 Difference]: Finished difference Result 12249 states and 15825 transitions. [2022-11-25 16:58:14,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:58:14,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2022-11-25 16:58:14,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:58:14,271 INFO L225 Difference]: With dead ends: 12249 [2022-11-25 16:58:14,271 INFO L226 Difference]: Without dead ends: 7399 [2022-11-25 16:58:14,278 INFO L412 NwaCegarLoop]: 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 [2022-11-25 16:58:14,281 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 418 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-25 16:58:14,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 545 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-25 16:58:14,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7399 states. [2022-11-25 16:58:14,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7399 to 4826. [2022-11-25 16:58:14,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4825 states have (on average 1.2652849740932643) internal successors, (6105), 4825 states have internal predecessors, (6105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:14,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 6105 transitions. [2022-11-25 16:58:14,489 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 6105 transitions. Word has length 184 [2022-11-25 16:58:14,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:58:14,490 INFO L495 AbstractCegarLoop]: Abstraction has 4826 states and 6105 transitions. [2022-11-25 16:58:14,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:14,490 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 6105 transitions. [2022-11-25 16:58:14,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-11-25 16:58:14,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:58:14,494 INFO L195 NwaCegarLoop]: 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-25 16:58:14,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 16:58:14,495 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:58:14,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:14,496 INFO L85 PathProgramCache]: Analyzing trace with hash 416641564, now seen corresponding path program 1 times [2022-11-25 16:58:14,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:14,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035410855] [2022-11-25 16:58:14,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:14,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-25 16:58:14,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:14,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035410855] [2022-11-25 16:58:14,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035410855] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:58:14,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:58:14,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:58:14,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147281360] [2022-11-25 16:58:14,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:58:14,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:58:14,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:14,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:58:14,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:58:14,731 INFO L87 Difference]: Start difference. First operand 4826 states and 6105 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:18,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:58:18,375 INFO L93 Difference]: Finished difference Result 13486 states and 17137 transitions. [2022-11-25 16:58:18,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:58:18,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 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 197 [2022-11-25 16:58:18,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:58:18,399 INFO L225 Difference]: With dead ends: 13486 [2022-11-25 16:58:18,400 INFO L226 Difference]: Without dead ends: 7355 [2022-11-25 16:58:18,406 INFO L412 NwaCegarLoop]: 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 [2022-11-25 16:58:18,407 INFO L413 NwaCegarLoop]: 605 mSDtfsCounter, 563 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1277 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 1821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 1277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-25 16:58:18,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 635 Invalid, 1821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 1277 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-25 16:58:18,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7355 states. [2022-11-25 16:58:18,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7355 to 6499. [2022-11-25 16:58:18,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6499 states, 6498 states have (on average 1.1871345029239766) internal successors, (7714), 6498 states have internal predecessors, (7714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:18,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6499 states to 6499 states and 7714 transitions. [2022-11-25 16:58:18,623 INFO L78 Accepts]: Start accepts. Automaton has 6499 states and 7714 transitions. Word has length 197 [2022-11-25 16:58:18,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:58:18,624 INFO L495 AbstractCegarLoop]: Abstraction has 6499 states and 7714 transitions. [2022-11-25 16:58:18,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:18,625 INFO L276 IsEmpty]: Start isEmpty. Operand 6499 states and 7714 transitions. [2022-11-25 16:58:18,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-11-25 16:58:18,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:58:18,629 INFO L195 NwaCegarLoop]: 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-25 16:58:18,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 16:58:18,630 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:58:18,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:18,631 INFO L85 PathProgramCache]: Analyzing trace with hash -2139731954, now seen corresponding path program 1 times [2022-11-25 16:58:18,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:18,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555974678] [2022-11-25 16:58:18,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:18,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:18,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:19,080 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-25 16:58:19,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:19,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555974678] [2022-11-25 16:58:19,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555974678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:58:19,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:58:19,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:58:19,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557822013] [2022-11-25 16:58:19,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:58:19,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:58:19,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:19,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:58:19,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:58:19,083 INFO L87 Difference]: Start difference. First operand 6499 states and 7714 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:21,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:58:21,743 INFO L93 Difference]: Finished difference Result 14278 states and 16920 transitions. [2022-11-25 16:58:21,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:58:21,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 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 250 [2022-11-25 16:58:21,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:58:21,764 INFO L225 Difference]: With dead ends: 14278 [2022-11-25 16:58:21,765 INFO L226 Difference]: Without dead ends: 7781 [2022-11-25 16:58:21,771 INFO L412 NwaCegarLoop]: 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 [2022-11-25 16:58:21,772 INFO L413 NwaCegarLoop]: 759 mSDtfsCounter, 406 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-25 16:58:21,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 812 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-25 16:58:21,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7781 states. [2022-11-25 16:58:21,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7781 to 7351. [2022-11-25 16:58:21,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7351 states, 7350 states have (on average 1.1794557823129252) internal successors, (8669), 7350 states have internal predecessors, (8669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:21,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7351 states to 7351 states and 8669 transitions. [2022-11-25 16:58:21,895 INFO L78 Accepts]: Start accepts. Automaton has 7351 states and 8669 transitions. Word has length 250 [2022-11-25 16:58:21,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:58:21,895 INFO L495 AbstractCegarLoop]: Abstraction has 7351 states and 8669 transitions. [2022-11-25 16:58:21,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:21,896 INFO L276 IsEmpty]: Start isEmpty. Operand 7351 states and 8669 transitions. [2022-11-25 16:58:21,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-11-25 16:58:21,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:58:21,902 INFO L195 NwaCegarLoop]: 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-25 16:58:21,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 16:58:21,905 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:58:21,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:21,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1207693812, now seen corresponding path program 1 times [2022-11-25 16:58:21,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:21,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966271293] [2022-11-25 16:58:21,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:21,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:22,326 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-25 16:58:22,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:22,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966271293] [2022-11-25 16:58:22,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966271293] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:58:22,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:58:22,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:58:22,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992587202] [2022-11-25 16:58:22,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:58:22,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:58:22,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:22,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:58:22,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:58:22,341 INFO L87 Difference]: Start difference. First operand 7351 states and 8669 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:25,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:58:25,092 INFO L93 Difference]: Finished difference Result 18527 states and 21831 transitions. [2022-11-25 16:58:25,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:58:25,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 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 268 [2022-11-25 16:58:25,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:58:25,119 INFO L225 Difference]: With dead ends: 18527 [2022-11-25 16:58:25,119 INFO L226 Difference]: Without dead ends: 11178 [2022-11-25 16:58:25,128 INFO L412 NwaCegarLoop]: 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 [2022-11-25 16:58:25,129 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 436 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-25 16:58:25,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 336 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1143 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-25 16:58:25,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11178 states. [2022-11-25 16:58:25,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11178 to 9900. [2022-11-25 16:58:25,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9900 states, 9899 states have (on average 1.1641579957571473) internal successors, (11524), 9899 states have internal predecessors, (11524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:25,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9900 states to 9900 states and 11524 transitions. [2022-11-25 16:58:25,314 INFO L78 Accepts]: Start accepts. Automaton has 9900 states and 11524 transitions. Word has length 268 [2022-11-25 16:58:25,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:58:25,315 INFO L495 AbstractCegarLoop]: Abstraction has 9900 states and 11524 transitions. [2022-11-25 16:58:25,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:25,316 INFO L276 IsEmpty]: Start isEmpty. Operand 9900 states and 11524 transitions. [2022-11-25 16:58:25,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-11-25 16:58:25,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:58:25,323 INFO L195 NwaCegarLoop]: 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-25 16:58:25,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 16:58:25,323 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:58:25,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:25,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1810738291, now seen corresponding path program 1 times [2022-11-25 16:58:25,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:25,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346672663] [2022-11-25 16:58:25,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:25,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:25,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:26,050 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 226 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-25 16:58:26,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:26,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346672663] [2022-11-25 16:58:26,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346672663] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:58:26,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:58:26,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:58:26,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884900693] [2022-11-25 16:58:26,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:58:26,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:58:26,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:26,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:58:26,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:58:26,054 INFO L87 Difference]: Start difference. First operand 9900 states and 11524 transitions. Second operand has 4 states, 4 states have (on average 52.25) internal successors, (209), 4 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:30,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:58:30,345 INFO L93 Difference]: Finished difference Result 31342 states and 36568 transitions. [2022-11-25 16:58:30,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:58:30,346 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.25) internal successors, (209), 4 states have internal predecessors, (209), 0 states have call successors, (0), 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 290 [2022-11-25 16:58:30,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:58:30,384 INFO L225 Difference]: With dead ends: 31342 [2022-11-25 16:58:30,384 INFO L226 Difference]: Without dead ends: 20165 [2022-11-25 16:58:30,396 INFO L412 NwaCegarLoop]: 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 [2022-11-25 16:58:30,397 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 873 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 2498 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 2899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 2498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:58:30,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 241 Invalid, 2899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 2498 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-25 16:58:30,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20165 states. [2022-11-25 16:58:30,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20165 to 18858. [2022-11-25 16:58:30,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18858 states, 18857 states have (on average 1.1585087765816409) internal successors, (21846), 18857 states have internal predecessors, (21846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:30,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18858 states to 18858 states and 21846 transitions. [2022-11-25 16:58:30,783 INFO L78 Accepts]: Start accepts. Automaton has 18858 states and 21846 transitions. Word has length 290 [2022-11-25 16:58:30,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:58:30,784 INFO L495 AbstractCegarLoop]: Abstraction has 18858 states and 21846 transitions. [2022-11-25 16:58:30,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.25) internal successors, (209), 4 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:30,784 INFO L276 IsEmpty]: Start isEmpty. Operand 18858 states and 21846 transitions. [2022-11-25 16:58:30,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2022-11-25 16:58:30,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:58:30,796 INFO L195 NwaCegarLoop]: 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:58:30,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 16:58:30,797 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:58:30,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:30,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1792169996, now seen corresponding path program 1 times [2022-11-25 16:58:30,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:30,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220031518] [2022-11-25 16:58:30,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:30,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:30,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:31,460 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 198 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-25 16:58:31,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:31,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220031518] [2022-11-25 16:58:31,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220031518] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:58:31,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984238663] [2022-11-25 16:58:31,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:31,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:58:31,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321f7f5-16b5-4636-8bfd-8ef11b189901/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:58:31,467 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321f7f5-16b5-4636-8bfd-8ef11b189901/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:58:31,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321f7f5-16b5-4636-8bfd-8ef11b189901/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 16:58:31,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:31,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 16:58:31,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:58:32,901 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 155 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:32,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:58:33,549 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 308 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:58:33,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984238663] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 16:58:33,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:58:33,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 4] total 7 [2022-11-25 16:58:33,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294795843] [2022-11-25 16:58:33,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:58:33,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 16:58:33,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:33,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 16:58:33,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:58:33,553 INFO L87 Difference]: Start difference. First operand 18858 states and 21846 transitions. Second operand has 5 states, 5 states have (on average 74.2) internal successors, (371), 4 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:38,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:58:38,700 INFO L93 Difference]: Finished difference Result 56887 states and 65971 transitions. [2022-11-25 16:58:38,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 16:58:38,703 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 74.2) internal successors, (371), 4 states have internal predecessors, (371), 0 states have call successors, (0), 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 371 [2022-11-25 16:58:38,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:58:38,763 INFO L225 Difference]: With dead ends: 56887 [2022-11-25 16:58:38,764 INFO L226 Difference]: Without dead ends: 37181 [2022-11-25 16:58:38,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 743 GetRequests, 735 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:58:38,785 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 1501 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2578 mSolverCounterSat, 906 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1501 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 3484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 906 IncrementalHoareTripleChecker+Valid, 2578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-25 16:58:38,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1501 Valid, 138 Invalid, 3484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [906 Valid, 2578 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-25 16:58:38,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37181 states. [2022-11-25 16:58:39,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37181 to 36745. [2022-11-25 16:58:39,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36745 states, 36744 states have (on average 1.1361582843457436) internal successors, (41747), 36744 states have internal predecessors, (41747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:39,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36745 states to 36745 states and 41747 transitions. [2022-11-25 16:58:39,382 INFO L78 Accepts]: Start accepts. Automaton has 36745 states and 41747 transitions. Word has length 371 [2022-11-25 16:58:39,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:58:39,383 INFO L495 AbstractCegarLoop]: Abstraction has 36745 states and 41747 transitions. [2022-11-25 16:58:39,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.2) internal successors, (371), 4 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:39,384 INFO L276 IsEmpty]: Start isEmpty. Operand 36745 states and 41747 transitions. [2022-11-25 16:58:39,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2022-11-25 16:58:39,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:58:39,398 INFO L195 NwaCegarLoop]: 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:58:39,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321f7f5-16b5-4636-8bfd-8ef11b189901/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 16:58:39,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321f7f5-16b5-4636-8bfd-8ef11b189901/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:58:39,607 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:58:39,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:39,608 INFO L85 PathProgramCache]: Analyzing trace with hash 704014078, now seen corresponding path program 1 times [2022-11-25 16:58:39,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:39,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097223074] [2022-11-25 16:58:39,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:39,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:39,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 242 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-25 16:58:41,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:41,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097223074] [2022-11-25 16:58:41,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097223074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:58:41,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425265246] [2022-11-25 16:58:41,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:41,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:58:41,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321f7f5-16b5-4636-8bfd-8ef11b189901/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:58:41,449 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321f7f5-16b5-4636-8bfd-8ef11b189901/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:58:41,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321f7f5-16b5-4636-8bfd-8ef11b189901/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 16:58:41,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:41,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 16:58:41,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:58:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 242 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-25 16:58:42,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:58:43,458 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 242 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-25 16:58:43,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425265246] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:58:43,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 16:58:43,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2022-11-25 16:58:43,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531190051] [2022-11-25 16:58:43,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 16:58:43,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 16:58:43,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:43,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 16:58:43,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-25 16:58:43,463 INFO L87 Difference]: Start difference. First operand 36745 states and 41747 transitions. Second operand has 10 states, 10 states have (on average 76.5) internal successors, (765), 9 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:55,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:58:55,396 INFO L93 Difference]: Finished difference Result 118667 states and 134596 transitions. [2022-11-25 16:58:55,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 16:58:55,399 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 76.5) internal successors, (765), 9 states have internal predecessors, (765), 0 states have call successors, (0), 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 414 [2022-11-25 16:58:55,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:58:55,483 INFO L225 Difference]: With dead ends: 118667 [2022-11-25 16:58:55,483 INFO L226 Difference]: Without dead ends: 81924 [2022-11-25 16:58:55,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 837 GetRequests, 823 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-11-25 16:58:55,511 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 8603 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 8472 mSolverCounterSat, 1004 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8603 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 9476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1004 IncrementalHoareTripleChecker+Valid, 8472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:58:55,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8603 Valid, 412 Invalid, 9476 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1004 Valid, 8472 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2022-11-25 16:58:55,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81924 states. [2022-11-25 16:58:56,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81924 to 78063. [2022-11-25 16:58:56,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78063 states, 78062 states have (on average 1.1161128333888448) internal successors, (87126), 78062 states have internal predecessors, (87126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:56,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78063 states to 78063 states and 87126 transitions. [2022-11-25 16:58:56,961 INFO L78 Accepts]: Start accepts. Automaton has 78063 states and 87126 transitions. Word has length 414 [2022-11-25 16:58:56,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:58:56,963 INFO L495 AbstractCegarLoop]: Abstraction has 78063 states and 87126 transitions. [2022-11-25 16:58:56,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 76.5) internal successors, (765), 9 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:58:56,964 INFO L276 IsEmpty]: Start isEmpty. Operand 78063 states and 87126 transitions. [2022-11-25 16:58:57,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2022-11-25 16:58:57,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:58:57,017 INFO L195 NwaCegarLoop]: 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 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] [2022-11-25 16:58:57,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321f7f5-16b5-4636-8bfd-8ef11b189901/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 16:58:57,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321f7f5-16b5-4636-8bfd-8ef11b189901/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 16:58:57,218 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:58:57,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:58:57,218 INFO L85 PathProgramCache]: Analyzing trace with hash 318019862, now seen corresponding path program 1 times [2022-11-25 16:58:57,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:58:57,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484894216] [2022-11-25 16:58:57,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:58:57,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:58:57,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:58:57,742 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 439 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-11-25 16:58:57,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:58:57,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484894216] [2022-11-25 16:58:57,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484894216] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:58:57,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:58:57,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:58:57,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079606631] [2022-11-25 16:58:57,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:58:57,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:58:57,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:58:57,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:58:57,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:58:57,747 INFO L87 Difference]: Start difference. First operand 78063 states and 87126 transitions. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:00,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:59:00,671 INFO L93 Difference]: Finished difference Result 161224 states and 179983 transitions. [2022-11-25 16:59:00,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:59:00,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 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 475 [2022-11-25 16:59:00,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:59:00,777 INFO L225 Difference]: With dead ends: 161224 [2022-11-25 16:59:00,777 INFO L226 Difference]: Without dead ends: 84013 [2022-11-25 16:59:00,809 INFO L412 NwaCegarLoop]: 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 [2022-11-25 16:59:00,810 INFO L413 NwaCegarLoop]: 683 mSDtfsCounter, 277 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:59:00,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 731 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-25 16:59:01,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84013 states. [2022-11-25 16:59:02,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84013 to 80188. [2022-11-25 16:59:02,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80188 states, 80187 states have (on average 1.1140708593662314) internal successors, (89334), 80187 states have internal predecessors, (89334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:02,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80188 states to 80188 states and 89334 transitions. [2022-11-25 16:59:02,479 INFO L78 Accepts]: Start accepts. Automaton has 80188 states and 89334 transitions. Word has length 475 [2022-11-25 16:59:02,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:59:02,491 INFO L495 AbstractCegarLoop]: Abstraction has 80188 states and 89334 transitions. [2022-11-25 16:59:02,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:02,491 INFO L276 IsEmpty]: Start isEmpty. Operand 80188 states and 89334 transitions. [2022-11-25 16:59:02,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2022-11-25 16:59:02,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:59:02,539 INFO L195 NwaCegarLoop]: 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:59:02,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 16:59:02,548 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:59:02,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:02,549 INFO L85 PathProgramCache]: Analyzing trace with hash -199318052, now seen corresponding path program 1 times [2022-11-25 16:59:02,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:02,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740536366] [2022-11-25 16:59:02,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:02,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:03,290 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 264 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-25 16:59:03,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:03,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740536366] [2022-11-25 16:59:03,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740536366] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:59:03,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:59:03,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:59:03,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669725088] [2022-11-25 16:59:03,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:59:03,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:59:03,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:03,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:59:03,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:59:03,297 INFO L87 Difference]: Start difference. First operand 80188 states and 89334 transitions. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:06,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:59:06,173 INFO L93 Difference]: Finished difference Result 169336 states and 188803 transitions. [2022-11-25 16:59:06,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:59:06,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 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 542 [2022-11-25 16:59:06,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:59:06,265 INFO L225 Difference]: With dead ends: 169336 [2022-11-25 16:59:06,265 INFO L226 Difference]: Without dead ends: 89150 [2022-11-25 16:59:06,304 INFO L412 NwaCegarLoop]: 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 [2022-11-25 16:59:06,304 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 413 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 1344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-25 16:59:06,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 230 Invalid, 1344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1162 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-25 16:59:06,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89150 states. [2022-11-25 16:59:07,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89150 to 89141. [2022-11-25 16:59:07,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89141 states, 89140 states have (on average 1.110758357639668) internal successors, (99013), 89140 states have internal predecessors, (99013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:07,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89141 states to 89141 states and 99013 transitions. [2022-11-25 16:59:07,834 INFO L78 Accepts]: Start accepts. Automaton has 89141 states and 99013 transitions. Word has length 542 [2022-11-25 16:59:07,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:59:07,835 INFO L495 AbstractCegarLoop]: Abstraction has 89141 states and 99013 transitions. [2022-11-25 16:59:07,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:07,835 INFO L276 IsEmpty]: Start isEmpty. Operand 89141 states and 99013 transitions. [2022-11-25 16:59:07,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2022-11-25 16:59:07,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:59:07,861 INFO L195 NwaCegarLoop]: 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 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] [2022-11-25 16:59:07,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 16:59:07,862 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:59:07,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:07,862 INFO L85 PathProgramCache]: Analyzing trace with hash -920286702, now seen corresponding path program 1 times [2022-11-25 16:59:07,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:07,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963350738] [2022-11-25 16:59:07,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:07,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:08,641 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 357 proven. 0 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-11-25 16:59:08,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:08,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963350738] [2022-11-25 16:59:08,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963350738] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:59:08,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:59:08,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:59:08,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166464092] [2022-11-25 16:59:08,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:59:08,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:59:08,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:08,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:59:08,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:59:08,645 INFO L87 Difference]: Start difference. First operand 89141 states and 99013 transitions. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:11,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:59:11,696 INFO L93 Difference]: Finished difference Result 195723 states and 216957 transitions. [2022-11-25 16:59:11,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:59:11,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 544 [2022-11-25 16:59:11,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:59:11,817 INFO L225 Difference]: With dead ends: 195723 [2022-11-25 16:59:11,817 INFO L226 Difference]: Without dead ends: 107009 [2022-11-25 16:59:11,852 INFO L412 NwaCegarLoop]: 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 [2022-11-25 16:59:11,853 INFO L413 NwaCegarLoop]: 606 mSDtfsCounter, 485 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:59:11,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 644 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-25 16:59:11,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107009 states. [2022-11-25 16:59:13,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107009 to 106998. [2022-11-25 16:59:13,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106998 states, 106997 states have (on average 1.0891613783564025) internal successors, (116537), 106997 states have internal predecessors, (116537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:13,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106998 states to 106998 states and 116537 transitions. [2022-11-25 16:59:13,729 INFO L78 Accepts]: Start accepts. Automaton has 106998 states and 116537 transitions. Word has length 544 [2022-11-25 16:59:13,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:59:13,729 INFO L495 AbstractCegarLoop]: Abstraction has 106998 states and 116537 transitions. [2022-11-25 16:59:13,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:13,730 INFO L276 IsEmpty]: Start isEmpty. Operand 106998 states and 116537 transitions. [2022-11-25 16:59:13,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 598 [2022-11-25 16:59:13,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:59:13,759 INFO L195 NwaCegarLoop]: 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:59:13,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 16:59:13,760 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:59:13,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:13,760 INFO L85 PathProgramCache]: Analyzing trace with hash 2018728974, now seen corresponding path program 1 times [2022-11-25 16:59:13,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:13,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208063272] [2022-11-25 16:59:13,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:13,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:13,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:15,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 493 proven. 0 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2022-11-25 16:59:15,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:15,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208063272] [2022-11-25 16:59:15,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208063272] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:59:15,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:59:15,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:59:15,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365566303] [2022-11-25 16:59:15,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:59:15,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:59:15,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:15,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:59:15,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:59:15,708 INFO L87 Difference]: Start difference. First operand 106998 states and 116537 transitions. Second operand has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:20,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:59:20,275 INFO L93 Difference]: Finished difference Result 238711 states and 259335 transitions. [2022-11-25 16:59:20,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:59:20,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 597 [2022-11-25 16:59:20,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:59:20,404 INFO L225 Difference]: With dead ends: 238711 [2022-11-25 16:59:20,404 INFO L226 Difference]: Without dead ends: 131290 [2022-11-25 16:59:20,447 INFO L412 NwaCegarLoop]: 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 [2022-11-25 16:59:20,449 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 825 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 2448 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 2844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 2448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-25 16:59:20,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [825 Valid, 158 Invalid, 2844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 2448 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-25 16:59:20,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131290 states. [2022-11-25 16:59:22,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131290 to 118906. [2022-11-25 16:59:22,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118906 states, 118905 states have (on average 1.0874731928850763) internal successors, (129306), 118905 states have internal predecessors, (129306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:22,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118906 states to 118906 states and 129306 transitions. [2022-11-25 16:59:22,440 INFO L78 Accepts]: Start accepts. Automaton has 118906 states and 129306 transitions. Word has length 597 [2022-11-25 16:59:22,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:59:22,441 INFO L495 AbstractCegarLoop]: Abstraction has 118906 states and 129306 transitions. [2022-11-25 16:59:22,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:22,441 INFO L276 IsEmpty]: Start isEmpty. Operand 118906 states and 129306 transitions. [2022-11-25 16:59:22,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 600 [2022-11-25 16:59:22,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:59:22,464 INFO L195 NwaCegarLoop]: 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-25 16:59:22,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 16:59:22,464 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:59:22,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:22,465 INFO L85 PathProgramCache]: Analyzing trace with hash 618956926, now seen corresponding path program 1 times [2022-11-25 16:59:22,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:22,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037037936] [2022-11-25 16:59:22,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:22,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:23,754 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 754 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-11-25 16:59:23,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:23,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037037936] [2022-11-25 16:59:23,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037037936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:59:23,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:59:23,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:59:23,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739812847] [2022-11-25 16:59:23,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:59:23,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:59:23,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:23,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:59:23,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:59:23,758 INFO L87 Difference]: Start difference. First operand 118906 states and 129306 transitions. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:26,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:59:26,857 INFO L93 Difference]: Finished difference Result 255269 states and 278205 transitions. [2022-11-25 16:59:26,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:59:26,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 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 599 [2022-11-25 16:59:26,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:59:26,991 INFO L225 Difference]: With dead ends: 255269 [2022-11-25 16:59:26,991 INFO L226 Difference]: Without dead ends: 136790 [2022-11-25 16:59:27,028 INFO L412 NwaCegarLoop]: 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 [2022-11-25 16:59:27,029 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 266 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-25 16:59:27,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 265 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-25 16:59:27,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136790 states. [2022-11-25 16:59:28,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136790 to 126990. [2022-11-25 16:59:28,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126990 states, 126989 states have (on average 1.0804872863003883) internal successors, (137210), 126989 states have internal predecessors, (137210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:29,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126990 states to 126990 states and 137210 transitions. [2022-11-25 16:59:29,162 INFO L78 Accepts]: Start accepts. Automaton has 126990 states and 137210 transitions. Word has length 599 [2022-11-25 16:59:29,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:59:29,163 INFO L495 AbstractCegarLoop]: Abstraction has 126990 states and 137210 transitions. [2022-11-25 16:59:29,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:29,163 INFO L276 IsEmpty]: Start isEmpty. Operand 126990 states and 137210 transitions. [2022-11-25 16:59:29,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 614 [2022-11-25 16:59:29,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:59:29,185 INFO L195 NwaCegarLoop]: 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:59:29,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 16:59:29,185 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:59:29,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:29,186 INFO L85 PathProgramCache]: Analyzing trace with hash -267407460, now seen corresponding path program 1 times [2022-11-25 16:59:29,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:29,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276159101] [2022-11-25 16:59:29,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:29,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:29,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:30,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 738 proven. 175 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-25 16:59:30,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:30,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276159101] [2022-11-25 16:59:30,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276159101] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:59:30,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679979179] [2022-11-25 16:59:30,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:30,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:59:30,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321f7f5-16b5-4636-8bfd-8ef11b189901/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:59:30,962 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321f7f5-16b5-4636-8bfd-8ef11b189901/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:59:30,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321f7f5-16b5-4636-8bfd-8ef11b189901/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 16:59:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:31,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 16:59:31,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:59:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 913 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-25 16:59:32,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:59:32,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679979179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:59:32,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:59:32,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-25 16:59:32,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283171764] [2022-11-25 16:59:32,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:59:32,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:59:32,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:32,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:59:32,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:59:32,190 INFO L87 Difference]: Start difference. First operand 126990 states and 137210 transitions. Second operand has 4 states, 4 states have (on average 128.25) internal successors, (513), 4 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:35,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:59:35,831 INFO L93 Difference]: Finished difference Result 260368 states and 281173 transitions. [2022-11-25 16:59:35,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:59:35,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 128.25) internal successors, (513), 4 states have internal predecessors, (513), 0 states have call successors, (0), 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 613 [2022-11-25 16:59:35,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:59:35,957 INFO L225 Difference]: With dead ends: 260368 [2022-11-25 16:59:35,957 INFO L226 Difference]: Without dead ends: 133805 [2022-11-25 16:59:35,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 612 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:59:35,991 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 810 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2006 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 2297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 2006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-25 16:59:35,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [810 Valid, 243 Invalid, 2297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 2006 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-25 16:59:36,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133805 states. [2022-11-25 16:59:37,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133805 to 128701. [2022-11-25 16:59:37,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128701 states, 128700 states have (on average 1.0765423465423465) internal successors, (138551), 128700 states have internal predecessors, (138551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:38,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128701 states to 128701 states and 138551 transitions. [2022-11-25 16:59:38,097 INFO L78 Accepts]: Start accepts. Automaton has 128701 states and 138551 transitions. Word has length 613 [2022-11-25 16:59:38,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:59:38,097 INFO L495 AbstractCegarLoop]: Abstraction has 128701 states and 138551 transitions. [2022-11-25 16:59:38,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 128.25) internal successors, (513), 4 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:38,097 INFO L276 IsEmpty]: Start isEmpty. Operand 128701 states and 138551 transitions. [2022-11-25 16:59:38,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2022-11-25 16:59:38,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:59:38,118 INFO L195 NwaCegarLoop]: 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:59:38,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321f7f5-16b5-4636-8bfd-8ef11b189901/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 16:59:38,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321f7f5-16b5-4636-8bfd-8ef11b189901/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:59:38,320 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:59:38,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:38,321 INFO L85 PathProgramCache]: Analyzing trace with hash 2072969500, now seen corresponding path program 1 times [2022-11-25 16:59:38,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:38,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147061053] [2022-11-25 16:59:38,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:38,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 815 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2022-11-25 16:59:38,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:38,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147061053] [2022-11-25 16:59:38,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147061053] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:59:38,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:59:38,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:59:38,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822060987] [2022-11-25 16:59:39,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:59:39,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:59:39,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:39,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:59:39,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:59:39,003 INFO L87 Difference]: Start difference. First operand 128701 states and 138551 transitions. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:42,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:59:42,504 INFO L93 Difference]: Finished difference Result 271063 states and 291897 transitions. [2022-11-25 16:59:42,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:59:42,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 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 641 [2022-11-25 16:59:42,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:59:42,675 INFO L225 Difference]: With dead ends: 271063 [2022-11-25 16:59:42,676 INFO L226 Difference]: Without dead ends: 142789 [2022-11-25 16:59:43,146 INFO L412 NwaCegarLoop]: 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 [2022-11-25 16:59:43,147 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 410 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-25 16:59:43,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 217 Invalid, 1378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-25 16:59:43,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142789 states. [2022-11-25 16:59:44,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142789 to 136788. [2022-11-25 16:59:44,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136788 states, 136787 states have (on average 1.075643153223625) internal successors, (147134), 136787 states have internal predecessors, (147134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:44,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136788 states to 136788 states and 147134 transitions. [2022-11-25 16:59:44,878 INFO L78 Accepts]: Start accepts. Automaton has 136788 states and 147134 transitions. Word has length 641 [2022-11-25 16:59:44,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:59:44,879 INFO L495 AbstractCegarLoop]: Abstraction has 136788 states and 147134 transitions. [2022-11-25 16:59:44,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:44,879 INFO L276 IsEmpty]: Start isEmpty. Operand 136788 states and 147134 transitions. [2022-11-25 16:59:44,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 699 [2022-11-25 16:59:44,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:59:44,897 INFO L195 NwaCegarLoop]: 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-25 16:59:44,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-25 16:59:44,898 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:59:44,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:44,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1597911280, now seen corresponding path program 1 times [2022-11-25 16:59:44,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:44,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915888054] [2022-11-25 16:59:44,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:44,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:45,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1443 backedges. 805 proven. 0 refuted. 0 times theorem prover too weak. 638 trivial. 0 not checked. [2022-11-25 16:59:45,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:45,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915888054] [2022-11-25 16:59:45,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915888054] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:59:45,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:59:45,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:59:45,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713455823] [2022-11-25 16:59:45,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:59:45,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:59:45,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:45,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:59:45,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:59:45,936 INFO L87 Difference]: Start difference. First operand 136788 states and 147134 transitions. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 2 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:59:48,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:59:48,460 INFO L93 Difference]: Finished difference Result 243313 states and 261005 transitions. [2022-11-25 16:59:48,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:59:48,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 2 states have internal predecessors, (322), 0 states have call successors, (0), 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 698 [2022-11-25 16:59:48,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:59:48,567 INFO L225 Difference]: With dead ends: 243313 [2022-11-25 16:59:48,567 INFO L226 Difference]: Without dead ends: 106951 [2022-11-25 16:59:48,595 INFO L412 NwaCegarLoop]: 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 [2022-11-25 16:59:48,596 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 564 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:59:48,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 73 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-25 16:59:48,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106951 states.