./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label17.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_fd9a164a-4de5-42da-90fb-01ba8bbff655/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd9a164a-4de5-42da-90fb-01ba8bbff655/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd9a164a-4de5-42da-90fb-01ba8bbff655/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd9a164a-4de5-42da-90fb-01ba8bbff655/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label17.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd9a164a-4de5-42da-90fb-01ba8bbff655/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd9a164a-4de5-42da-90fb-01ba8bbff655/bin/uautomizer-TMbwUNV5ro --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 ae22f3f06aabed24b98a90f87729aaa6479f5932deb24c738c216ff13229105f --- 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-8393723 [2022-11-18 18:28:16,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:28:16,972 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:28:17,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:28:17,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:28:17,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:28:17,011 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:28:17,013 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:28:17,023 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:28:17,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:28:17,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:28:17,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:28:17,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:28:17,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:28:17,034 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:28:17,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:28:17,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:28:17,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:28:17,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:28:17,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:28:17,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:28:17,051 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:28:17,052 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:28:17,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:28:17,057 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:28:17,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:28:17,058 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:28:17,059 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:28:17,060 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:28:17,061 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:28:17,061 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:28:17,062 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:28:17,063 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:28:17,064 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:28:17,065 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:28:17,065 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:28:17,066 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:28:17,067 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:28:17,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:28:17,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:28:17,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:28:17,070 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd9a164a-4de5-42da-90fb-01ba8bbff655/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 18:28:17,093 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:28:17,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:28:17,094 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:28:17,094 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:28:17,095 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:28:17,095 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:28:17,096 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:28:17,096 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:28:17,097 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:28:17,097 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:28:17,097 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:28:17,097 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:28:17,098 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:28:17,098 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:28:17,098 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:28:17,098 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:28:17,098 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:28:17,099 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:28:17,099 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:28:17,099 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:28:17,099 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:28:17,099 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:28:17,100 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:28:17,100 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:28:17,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:28:17,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:28:17,101 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:28:17,101 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:28:17,101 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:28:17,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:28:17,101 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:28:17,102 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:28:17,102 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:28:17,102 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd9a164a-4de5-42da-90fb-01ba8bbff655/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd9a164a-4de5-42da-90fb-01ba8bbff655/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ae22f3f06aabed24b98a90f87729aaa6479f5932deb24c738c216ff13229105f [2022-11-18 18:28:17,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:28:17,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:28:17,361 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:28:17,363 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:28:17,364 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:28:17,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd9a164a-4de5-42da-90fb-01ba8bbff655/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/eca-rers2012/Problem17_label17.c [2022-11-18 18:28:17,447 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd9a164a-4de5-42da-90fb-01ba8bbff655/bin/uautomizer-TMbwUNV5ro/data/1f0b5a07e/1466aaae49b54f65a8bf73bd43fb17c9/FLAG90d642fbd [2022-11-18 18:28:18,290 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:28:18,291 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd9a164a-4de5-42da-90fb-01ba8bbff655/sv-benchmarks/c/eca-rers2012/Problem17_label17.c [2022-11-18 18:28:18,319 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd9a164a-4de5-42da-90fb-01ba8bbff655/bin/uautomizer-TMbwUNV5ro/data/1f0b5a07e/1466aaae49b54f65a8bf73bd43fb17c9/FLAG90d642fbd [2022-11-18 18:28:18,365 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd9a164a-4de5-42da-90fb-01ba8bbff655/bin/uautomizer-TMbwUNV5ro/data/1f0b5a07e/1466aaae49b54f65a8bf73bd43fb17c9 [2022-11-18 18:28:18,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:28:18,374 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:28:18,383 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:28:18,383 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:28:18,387 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:28:18,388 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:28:18" (1/1) ... [2022-11-18 18:28:18,389 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1682b719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:28:18, skipping insertion in model container [2022-11-18 18:28:18,390 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:28:18" (1/1) ... [2022-11-18 18:28:18,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:28:18,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:28:18,762 WARN L234 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_fd9a164a-4de5-42da-90fb-01ba8bbff655/sv-benchmarks/c/eca-rers2012/Problem17_label17.c[5781,5794] [2022-11-18 18:28:19,500 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:28:19,517 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:28:19,552 WARN L234 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_fd9a164a-4de5-42da-90fb-01ba8bbff655/sv-benchmarks/c/eca-rers2012/Problem17_label17.c[5781,5794] [2022-11-18 18:28:19,921 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:28:19,942 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:28:19,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:28:19 WrapperNode [2022-11-18 18:28:19,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:28:19,944 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:28:19,944 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:28:19,944 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:28:19,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:28:19" (1/1) ... [2022-11-18 18:28:20,023 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:28:19" (1/1) ... [2022-11-18 18:28:20,384 INFO L138 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2022-11-18 18:28:20,384 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:28:20,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:28:20,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:28:20,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:28:20,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:28:19" (1/1) ... [2022-11-18 18:28:20,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:28:19" (1/1) ... [2022-11-18 18:28:20,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:28:19" (1/1) ... [2022-11-18 18:28:20,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:28:19" (1/1) ... [2022-11-18 18:28:20,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:28:19" (1/1) ... [2022-11-18 18:28:20,666 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:28:19" (1/1) ... [2022-11-18 18:28:20,703 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:28:19" (1/1) ... [2022-11-18 18:28:20,717 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:28:19" (1/1) ... [2022-11-18 18:28:20,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:28:20,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:28:20,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:28:20,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:28:20,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:28:19" (1/1) ... [2022-11-18 18:28:20,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:28:20,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd9a164a-4de5-42da-90fb-01ba8bbff655/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:28:20,809 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd9a164a-4de5-42da-90fb-01ba8bbff655/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:28:20,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd9a164a-4de5-42da-90fb-01ba8bbff655/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:28:20,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:28:20,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:28:20,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:28:20,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:28:20,987 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:28:20,990 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:28:25,713 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:28:25,736 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:28:25,736 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-18 18:28:25,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:28:25 BoogieIcfgContainer [2022-11-18 18:28:25,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:28:25,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:28:25,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:28:25,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:28:25,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:28:18" (1/3) ... [2022-11-18 18:28:25,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bf0315f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:28:25, skipping insertion in model container [2022-11-18 18:28:25,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:28:19" (2/3) ... [2022-11-18 18:28:25,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bf0315f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:28:25, skipping insertion in model container [2022-11-18 18:28:25,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:28:25" (3/3) ... [2022-11-18 18:28:25,753 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label17.c [2022-11-18 18:28:25,775 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:28:25,776 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 18:28:25,864 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:28:25,879 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;@c265a97, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:28:25,880 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 18:28:25,888 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) [2022-11-18 18:28:25,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-18 18:28:25,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:28:25,897 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:28:25,898 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:28:25,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:28:25,904 INFO L85 PathProgramCache]: Analyzing trace with hash 323974986, now seen corresponding path program 1 times [2022-11-18 18:28:25,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:28:25,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868128765] [2022-11-18 18:28:25,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:28:25,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:28:26,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:28:26,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:28:26,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:28:26,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868128765] [2022-11-18 18:28:26,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868128765] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:28:26,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:28:26,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:28:26,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901479000] [2022-11-18 18:28:26,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:28:26,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:28:26,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:28:26,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:28:26,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:28:26,448 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 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:30,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:28:30,604 INFO L93 Difference]: Finished difference Result 1667 states and 3061 transitions. [2022-11-18 18:28:30,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:28:30,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2022-11-18 18:28:30,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:28:30,627 INFO L225 Difference]: With dead ends: 1667 [2022-11-18 18:28:30,627 INFO L226 Difference]: Without dead ends: 998 [2022-11-18 18:28:30,633 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 [2022-11-18 18:28:30,636 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 507 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 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, 4.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:28:30,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 276 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-18 18:28:30,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-11-18 18:28:30,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 982. [2022-11-18 18:28:30,748 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) [2022-11-18 18:28:30,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1675 transitions. [2022-11-18 18:28:30,755 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1675 transitions. Word has length 38 [2022-11-18 18:28:30,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:28:30,756 INFO L495 AbstractCegarLoop]: Abstraction has 982 states and 1675 transitions. [2022-11-18 18:28:30,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:30,757 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1675 transitions. [2022-11-18 18:28:30,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-18 18:28:30,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:28:30,764 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, 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] [2022-11-18 18:28:30,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:28:30,764 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:28:30,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:28:30,765 INFO L85 PathProgramCache]: Analyzing trace with hash -989652857, now seen corresponding path program 1 times [2022-11-18 18:28:30,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:28:30,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671435562] [2022-11-18 18:28:30,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:28:30,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:28:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:28:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:28:31,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:28:31,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671435562] [2022-11-18 18:28:31,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671435562] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:28:31,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:28:31,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:28:31,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041114685] [2022-11-18 18:28:31,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:28:31,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:28:31,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:28:31,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:28:31,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:28:31,173 INFO L87 Difference]: Start difference. First operand 982 states and 1675 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:34,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:28:34,758 INFO L93 Difference]: Finished difference Result 2841 states and 4881 transitions. [2022-11-18 18:28:34,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:28:34,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 0 states have call successors, (0), 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 103 [2022-11-18 18:28:34,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:28:34,767 INFO L225 Difference]: With dead ends: 2841 [2022-11-18 18:28:34,767 INFO L226 Difference]: Without dead ends: 1861 [2022-11-18 18:28:34,770 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 [2022-11-18 18:28:34,772 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 407 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s 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, 3.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:28:34,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 496 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-18 18:28:34,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2022-11-18 18:28:34,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1857. [2022-11-18 18:28:34,819 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) [2022-11-18 18:28:34,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2700 transitions. [2022-11-18 18:28:34,825 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2700 transitions. Word has length 103 [2022-11-18 18:28:34,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:28:34,826 INFO L495 AbstractCegarLoop]: Abstraction has 1857 states and 2700 transitions. [2022-11-18 18:28:34,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:34,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2700 transitions. [2022-11-18 18:28:34,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-18 18:28:34,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:28:34,830 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, 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] [2022-11-18 18:28:34,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:28:34,830 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:28:34,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:28:34,831 INFO L85 PathProgramCache]: Analyzing trace with hash 930924988, now seen corresponding path program 1 times [2022-11-18 18:28:34,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:28:34,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533309384] [2022-11-18 18:28:34,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:28:34,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:28:34,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:28:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:28:35,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:28:35,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533309384] [2022-11-18 18:28:35,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533309384] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:28:35,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:28:35,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:28:35,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597501371] [2022-11-18 18:28:35,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:28:35,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:28:35,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:28:35,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:28:35,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:28:35,438 INFO L87 Difference]: Start difference. First operand 1857 states and 2700 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:39,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:28:39,430 INFO L93 Difference]: Finished difference Result 4591 states and 6640 transitions. [2022-11-18 18:28:39,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:28:39,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 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 143 [2022-11-18 18:28:39,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:28:39,440 INFO L225 Difference]: With dead ends: 4591 [2022-11-18 18:28:39,441 INFO L226 Difference]: Without dead ends: 2736 [2022-11-18 18:28:39,443 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 [2022-11-18 18:28:39,444 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 352 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s 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, 3.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:28:39,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 537 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-18 18:28:39,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2022-11-18 18:28:39,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2716. [2022-11-18 18:28:39,496 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) [2022-11-18 18:28:39,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 3776 transitions. [2022-11-18 18:28:39,503 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 3776 transitions. Word has length 143 [2022-11-18 18:28:39,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:28:39,504 INFO L495 AbstractCegarLoop]: Abstraction has 2716 states and 3776 transitions. [2022-11-18 18:28:39,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:39,505 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 3776 transitions. [2022-11-18 18:28:39,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-18 18:28:39,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:28:39,507 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, 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] [2022-11-18 18:28:39,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 18:28:39,508 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:28:39,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:28:39,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1726883379, now seen corresponding path program 1 times [2022-11-18 18:28:39,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:28:39,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454542515] [2022-11-18 18:28:39,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:28:39,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:28:39,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:28:39,681 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:28:39,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:28:39,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454542515] [2022-11-18 18:28:39,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454542515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:28:39,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:28:39,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:28:39,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54078475] [2022-11-18 18:28:39,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:28:39,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:28:39,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:28:39,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:28:39,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:28:39,684 INFO L87 Difference]: Start difference. First operand 2716 states and 3776 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:42,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:28:42,372 INFO L93 Difference]: Finished difference Result 6709 states and 9429 transitions. [2022-11-18 18:28:42,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:28:42,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2022-11-18 18:28:42,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:28:42,388 INFO L225 Difference]: With dead ends: 6709 [2022-11-18 18:28:42,388 INFO L226 Difference]: Without dead ends: 3995 [2022-11-18 18:28:42,392 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 [2022-11-18 18:28:42,403 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 347 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s 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, 2.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:28:42,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-18 18:28:42,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3995 states. [2022-11-18 18:28:42,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3995 to 3142. [2022-11-18 18:28:42,467 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) [2022-11-18 18:28:42,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 4003 transitions. [2022-11-18 18:28:42,475 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 4003 transitions. Word has length 149 [2022-11-18 18:28:42,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:28:42,477 INFO L495 AbstractCegarLoop]: Abstraction has 3142 states and 4003 transitions. [2022-11-18 18:28:42,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:42,477 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 4003 transitions. [2022-11-18 18:28:42,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-11-18 18:28:42,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:28:42,484 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:28:42,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 18:28:42,484 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:28:42,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:28:42,485 INFO L85 PathProgramCache]: Analyzing trace with hash -2103453513, now seen corresponding path program 1 times [2022-11-18 18:28:42,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:28:42,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106323646] [2022-11-18 18:28:42,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:28:42,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:28:42,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:28:43,007 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:28:43,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:28:43,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106323646] [2022-11-18 18:28:43,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106323646] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:28:43,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:28:43,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 18:28:43,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373102469] [2022-11-18 18:28:43,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:28:43,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 18:28:43,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:28:43,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 18:28:43,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:28:43,011 INFO L87 Difference]: Start difference. First operand 3142 states and 4003 transitions. Second operand has 5 states, 5 states have (on average 37.2) internal successors, (186), 5 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:46,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:28:46,999 INFO L93 Difference]: Finished difference Result 8019 states and 10522 transitions. [2022-11-18 18:28:47,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:28:47,007 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 37.2) internal successors, (186), 5 states have internal predecessors, (186), 0 states have call successors, (0), 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 186 [2022-11-18 18:28:47,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:28:47,024 INFO L225 Difference]: With dead ends: 8019 [2022-11-18 18:28:47,024 INFO L226 Difference]: Without dead ends: 4879 [2022-11-18 18:28:47,029 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 [2022-11-18 18:28:47,029 INFO L413 NwaCegarLoop]: 756 mSDtfsCounter, 1096 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 1990 mSolverCounterSat, 813 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 813 IncrementalHoareTripleChecker+Valid, 1990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:28:47,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1096 Valid, 881 Invalid, 2803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [813 Valid, 1990 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-18 18:28:47,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4879 states. [2022-11-18 18:28:47,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4879 to 4852. [2022-11-18 18:28:47,120 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) [2022-11-18 18:28:47,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4852 states to 4852 states and 6144 transitions. [2022-11-18 18:28:47,131 INFO L78 Accepts]: Start accepts. Automaton has 4852 states and 6144 transitions. Word has length 186 [2022-11-18 18:28:47,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:28:47,132 INFO L495 AbstractCegarLoop]: Abstraction has 4852 states and 6144 transitions. [2022-11-18 18:28:47,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.2) internal successors, (186), 5 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:47,136 INFO L276 IsEmpty]: Start isEmpty. Operand 4852 states and 6144 transitions. [2022-11-18 18:28:47,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-18 18:28:47,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:28:47,140 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, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:28:47,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 18:28:47,141 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:28:47,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:28:47,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1043443864, now seen corresponding path program 1 times [2022-11-18 18:28:47,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:28:47,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400747123] [2022-11-18 18:28:47,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:28:47,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:28:47,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:28:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-18 18:28:47,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:28:47,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400747123] [2022-11-18 18:28:47,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400747123] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:28:47,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:28:47,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:28:47,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101029165] [2022-11-18 18:28:47,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:28:47,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:28:47,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:28:47,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:28:47,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:28:47,368 INFO L87 Difference]: Start difference. First operand 4852 states and 6144 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:50,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:28:50,563 INFO L93 Difference]: Finished difference Result 12249 states and 15825 transitions. [2022-11-18 18:28:50,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:28:50,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 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 192 [2022-11-18 18:28:50,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:28:50,590 INFO L225 Difference]: With dead ends: 12249 [2022-11-18 18:28:50,590 INFO L226 Difference]: Without dead ends: 7399 [2022-11-18 18:28:50,595 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 [2022-11-18 18:28:50,596 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 410 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 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, 3.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:28:50,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 545 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-18 18:28:50,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7399 states. [2022-11-18 18:28:50,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7399 to 4826. [2022-11-18 18:28:50,704 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) [2022-11-18 18:28:50,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 6105 transitions. [2022-11-18 18:28:50,714 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 6105 transitions. Word has length 192 [2022-11-18 18:28:50,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:28:50,714 INFO L495 AbstractCegarLoop]: Abstraction has 4826 states and 6105 transitions. [2022-11-18 18:28:50,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:50,715 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 6105 transitions. [2022-11-18 18:28:50,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-11-18 18:28:50,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:28:50,718 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, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:28:50,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 18:28:50,719 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:28:50,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:28:50,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1340382276, now seen corresponding path program 1 times [2022-11-18 18:28:50,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:28:50,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207122762] [2022-11-18 18:28:50,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:28:50,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:28:50,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:28:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-18 18:28:50,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:28:50,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207122762] [2022-11-18 18:28:50,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207122762] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:28:50,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:28:50,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:28:50,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895737133] [2022-11-18 18:28:50,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:28:50,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:28:50,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:28:50,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:28:50,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:28:50,914 INFO L87 Difference]: Start difference. First operand 4826 states and 6105 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:54,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:28:54,190 INFO L93 Difference]: Finished difference Result 13481 states and 17131 transitions. [2022-11-18 18:28:54,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:28:54,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 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 205 [2022-11-18 18:28:54,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:28:54,214 INFO L225 Difference]: With dead ends: 13481 [2022-11-18 18:28:54,215 INFO L226 Difference]: Without dead ends: 8657 [2022-11-18 18:28:54,219 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 [2022-11-18 18:28:54,220 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 446 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 1748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:28:54,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 483 Invalid, 1748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-18 18:28:54,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8657 states. [2022-11-18 18:28:54,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8657 to 7378. [2022-11-18 18:28:54,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7378 states, 7377 states have (on average 1.2479327639962043) internal successors, (9206), 7377 states have internal predecessors, (9206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:54,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7378 states to 7378 states and 9206 transitions. [2022-11-18 18:28:54,370 INFO L78 Accepts]: Start accepts. Automaton has 7378 states and 9206 transitions. Word has length 205 [2022-11-18 18:28:54,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:28:54,370 INFO L495 AbstractCegarLoop]: Abstraction has 7378 states and 9206 transitions. [2022-11-18 18:28:54,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:54,371 INFO L276 IsEmpty]: Start isEmpty. Operand 7378 states and 9206 transitions. [2022-11-18 18:28:54,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-11-18 18:28:54,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:28:54,376 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, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:28:54,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 18:28:54,376 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:28:54,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:28:54,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1262415176, now seen corresponding path program 1 times [2022-11-18 18:28:54,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:28:54,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143169434] [2022-11-18 18:28:54,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:28:54,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:28:54,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:28:54,735 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:28:54,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:28:54,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143169434] [2022-11-18 18:28:54,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143169434] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:28:54,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:28:54,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:28:54,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843949737] [2022-11-18 18:28:54,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:28:54,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:28:54,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:28:54,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:28:54,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:28:54,738 INFO L87 Difference]: Start difference. First operand 7378 states and 9206 transitions. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:57,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:28:57,815 INFO L93 Difference]: Finished difference Result 19035 states and 23868 transitions. [2022-11-18 18:28:57,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:28:57,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 254 [2022-11-18 18:28:57,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:28:57,836 INFO L225 Difference]: With dead ends: 19035 [2022-11-18 18:28:57,836 INFO L226 Difference]: Without dead ends: 10807 [2022-11-18 18:28:57,842 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 [2022-11-18 18:28:57,843 INFO L413 NwaCegarLoop]: 821 mSDtfsCounter, 370 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 1672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:28:57,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 896 Invalid, 1672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-18 18:28:57,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10807 states. [2022-11-18 18:28:57,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10807 to 10799. [2022-11-18 18:28:57,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10799 states, 10798 states have (on average 1.1793850713095018) internal successors, (12735), 10798 states have internal predecessors, (12735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:58,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10799 states to 10799 states and 12735 transitions. [2022-11-18 18:28:58,017 INFO L78 Accepts]: Start accepts. Automaton has 10799 states and 12735 transitions. Word has length 254 [2022-11-18 18:28:58,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:28:58,018 INFO L495 AbstractCegarLoop]: Abstraction has 10799 states and 12735 transitions. [2022-11-18 18:28:58,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:28:58,018 INFO L276 IsEmpty]: Start isEmpty. Operand 10799 states and 12735 transitions. [2022-11-18 18:28:58,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-11-18 18:28:58,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:28:58,023 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:28:58,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 18:28:58,023 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:28:58,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:28:58,024 INFO L85 PathProgramCache]: Analyzing trace with hash 630058036, now seen corresponding path program 1 times [2022-11-18 18:28:58,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:28:58,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700519837] [2022-11-18 18:28:58,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:28:58,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:28:58,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:28:58,473 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 210 proven. 70 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-18 18:28:58,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:28:58,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700519837] [2022-11-18 18:28:58,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700519837] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:28:58,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412047333] [2022-11-18 18:28:58,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:28:58,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:28:58,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd9a164a-4de5-42da-90fb-01ba8bbff655/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:28:58,479 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd9a164a-4de5-42da-90fb-01ba8bbff655/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:28:58,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd9a164a-4de5-42da-90fb-01ba8bbff655/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:28:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:28:58,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:28:58,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:28:59,349 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 210 proven. 70 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-18 18:28:59,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:28:59,771 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 280 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-18 18:28:59,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412047333] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 18:28:59,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:28:59,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2022-11-18 18:28:59,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506671497] [2022-11-18 18:28:59,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:28:59,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:28:59,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:28:59,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:28:59,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:28:59,776 INFO L87 Difference]: Start difference. First operand 10799 states and 12735 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:05,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:29:05,084 INFO L93 Difference]: Finished difference Result 35677 states and 42172 transitions. [2022-11-18 18:29:05,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:29:05,091 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 262 [2022-11-18 18:29:05,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:29:05,139 INFO L225 Difference]: With dead ends: 35677 [2022-11-18 18:29:05,139 INFO L226 Difference]: Without dead ends: 24019 [2022-11-18 18:29:05,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 519 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:29:05,154 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 1086 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 2268 mSolverCounterSat, 1255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1086 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 3523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1255 IncrementalHoareTripleChecker+Valid, 2268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:29:05,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1086 Valid, 144 Invalid, 3523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1255 Valid, 2268 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-18 18:29:05,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24019 states. [2022-11-18 18:29:05,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24019 to 22742. [2022-11-18 18:29:05,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22742 states, 22741 states have (on average 1.1553141902291015) internal successors, (26273), 22741 states have internal predecessors, (26273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:05,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22742 states to 22742 states and 26273 transitions. [2022-11-18 18:29:05,565 INFO L78 Accepts]: Start accepts. Automaton has 22742 states and 26273 transitions. Word has length 262 [2022-11-18 18:29:05,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:29:05,565 INFO L495 AbstractCegarLoop]: Abstraction has 22742 states and 26273 transitions. [2022-11-18 18:29:05,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:05,566 INFO L276 IsEmpty]: Start isEmpty. Operand 22742 states and 26273 transitions. [2022-11-18 18:29:05,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-11-18 18:29:05,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:29:05,572 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:29:05,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd9a164a-4de5-42da-90fb-01ba8bbff655/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:29:05,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd9a164a-4de5-42da-90fb-01ba8bbff655/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:29:05,777 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:29:05,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:29:05,778 INFO L85 PathProgramCache]: Analyzing trace with hash 373783336, now seen corresponding path program 1 times [2022-11-18 18:29:05,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:29:05,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545942718] [2022-11-18 18:29:05,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:05,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:29:05,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:29:06,065 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-18 18:29:06,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:29:06,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545942718] [2022-11-18 18:29:06,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545942718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:29:06,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:29:06,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:29:06,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112671832] [2022-11-18 18:29:06,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:29:06,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:29:06,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:29:06,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:29:06,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:29:06,067 INFO L87 Difference]: Start difference. First operand 22742 states and 26273 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:08,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:29:08,662 INFO L93 Difference]: Finished difference Result 50583 states and 58592 transitions. [2022-11-18 18:29:08,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:29:08,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 275 [2022-11-18 18:29:08,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:29:08,724 INFO L225 Difference]: With dead ends: 50583 [2022-11-18 18:29:08,724 INFO L226 Difference]: Without dead ends: 27416 [2022-11-18 18:29:08,745 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 [2022-11-18 18:29:08,746 INFO L413 NwaCegarLoop]: 775 mSDtfsCounter, 378 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:29:08,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 842 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-18 18:29:08,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27416 states. [2022-11-18 18:29:09,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27416 to 27416. [2022-11-18 18:29:09,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27416 states, 27415 states have (on average 1.1312055444099944) internal successors, (31012), 27415 states have internal predecessors, (31012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:09,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27416 states to 27416 states and 31012 transitions. [2022-11-18 18:29:09,236 INFO L78 Accepts]: Start accepts. Automaton has 27416 states and 31012 transitions. Word has length 275 [2022-11-18 18:29:09,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:29:09,237 INFO L495 AbstractCegarLoop]: Abstraction has 27416 states and 31012 transitions. [2022-11-18 18:29:09,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:09,237 INFO L276 IsEmpty]: Start isEmpty. Operand 27416 states and 31012 transitions. [2022-11-18 18:29:09,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2022-11-18 18:29:09,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:29:09,245 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, 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, 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] [2022-11-18 18:29:09,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-18 18:29:09,245 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:29:09,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:29:09,246 INFO L85 PathProgramCache]: Analyzing trace with hash -218422914, now seen corresponding path program 1 times [2022-11-18 18:29:09,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:29:09,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525746302] [2022-11-18 18:29:09,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:09,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:29:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:29:09,786 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 232 proven. 78 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-18 18:29:09,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:29:09,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525746302] [2022-11-18 18:29:09,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525746302] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:29:09,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750145294] [2022-11-18 18:29:09,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:09,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:29:09,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd9a164a-4de5-42da-90fb-01ba8bbff655/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:29:09,789 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd9a164a-4de5-42da-90fb-01ba8bbff655/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:29:09,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd9a164a-4de5-42da-90fb-01ba8bbff655/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:29:10,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:29:10,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:29:10,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:29:10,471 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 232 proven. 78 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-18 18:29:10,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:29:10,789 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-18 18:29:10,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750145294] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 18:29:10,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:29:10,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2022-11-18 18:29:10,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761888924] [2022-11-18 18:29:10,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:29:10,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:29:10,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:29:10,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:29:10,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:29:10,792 INFO L87 Difference]: Start difference. First operand 27416 states and 31012 transitions. Second operand has 4 states, 4 states have (on average 74.5) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:15,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:29:15,367 INFO L93 Difference]: Finished difference Result 68481 states and 77437 transitions. [2022-11-18 18:29:15,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:29:15,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 74.5) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 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 333 [2022-11-18 18:29:15,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:29:15,431 INFO L225 Difference]: With dead ends: 68481 [2022-11-18 18:29:15,431 INFO L226 Difference]: Without dead ends: 40640 [2022-11-18 18:29:15,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 661 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:29:15,448 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 838 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 2336 mSolverCounterSat, 499 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 2835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 499 IncrementalHoareTripleChecker+Valid, 2336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:29:15,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [838 Valid, 195 Invalid, 2835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [499 Valid, 2336 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-18 18:29:15,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40640 states. [2022-11-18 18:29:15,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40640 to 38512. [2022-11-18 18:29:16,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38512 states, 38511 states have (on average 1.1338578587935915) internal successors, (43666), 38511 states have internal predecessors, (43666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:16,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38512 states to 38512 states and 43666 transitions. [2022-11-18 18:29:16,085 INFO L78 Accepts]: Start accepts. Automaton has 38512 states and 43666 transitions. Word has length 333 [2022-11-18 18:29:16,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:29:16,086 INFO L495 AbstractCegarLoop]: Abstraction has 38512 states and 43666 transitions. [2022-11-18 18:29:16,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.5) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:16,086 INFO L276 IsEmpty]: Start isEmpty. Operand 38512 states and 43666 transitions. [2022-11-18 18:29:16,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2022-11-18 18:29:16,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:29:16,101 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, 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, 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] [2022-11-18 18:29:16,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd9a164a-4de5-42da-90fb-01ba8bbff655/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:29:16,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd9a164a-4de5-42da-90fb-01ba8bbff655/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 18:29:16,308 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:29:16,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:29:16,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1646857500, now seen corresponding path program 1 times [2022-11-18 18:29:16,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:29:16,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20415393] [2022-11-18 18:29:16,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:16,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:29:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:29:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 404 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-11-18 18:29:16,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:29:16,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20415393] [2022-11-18 18:29:16,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20415393] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:29:16,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:29:16,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:29:16,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441550529] [2022-11-18 18:29:16,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:29:16,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:29:16,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:29:16,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:29:16,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:29:16,676 INFO L87 Difference]: Start difference. First operand 38512 states and 43666 transitions. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:19,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:29:19,344 INFO L93 Difference]: Finished difference Result 89785 states and 102267 transitions. [2022-11-18 18:29:19,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:29:19,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 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 433 [2022-11-18 18:29:19,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:29:19,411 INFO L225 Difference]: With dead ends: 89785 [2022-11-18 18:29:19,411 INFO L226 Difference]: Without dead ends: 49573 [2022-11-18 18:29:19,436 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 [2022-11-18 18:29:19,437 INFO L413 NwaCegarLoop]: 728 mSDtfsCounter, 338 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 1427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:29:19,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 787 Invalid, 1427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1169 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-18 18:29:19,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49573 states. [2022-11-18 18:29:19,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49573 to 37619. [2022-11-18 18:29:19,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37619 states, 37618 states have (on average 1.132729012706683) internal successors, (42611), 37618 states have internal predecessors, (42611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:20,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37619 states to 37619 states and 42611 transitions. [2022-11-18 18:29:20,022 INFO L78 Accepts]: Start accepts. Automaton has 37619 states and 42611 transitions. Word has length 433 [2022-11-18 18:29:20,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:29:20,023 INFO L495 AbstractCegarLoop]: Abstraction has 37619 states and 42611 transitions. [2022-11-18 18:29:20,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:20,023 INFO L276 IsEmpty]: Start isEmpty. Operand 37619 states and 42611 transitions. [2022-11-18 18:29:20,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2022-11-18 18:29:20,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:29:20,140 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, 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:29:20,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-18 18:29:20,141 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:29:20,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:29:20,141 INFO L85 PathProgramCache]: Analyzing trace with hash -230560999, now seen corresponding path program 1 times [2022-11-18 18:29:20,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:29:20,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156703234] [2022-11-18 18:29:20,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:20,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:29:20,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:29:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2022-11-18 18:29:20,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:29:20,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156703234] [2022-11-18 18:29:20,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156703234] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:29:20,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:29:20,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:29:20,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434823444] [2022-11-18 18:29:20,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:29:20,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:29:20,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:29:20,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:29:20,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:29:20,623 INFO L87 Difference]: Start difference. First operand 37619 states and 42611 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:23,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:29:23,544 INFO L93 Difference]: Finished difference Result 87614 states and 98821 transitions. [2022-11-18 18:29:23,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:29:23,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 434 [2022-11-18 18:29:23,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:29:23,604 INFO L225 Difference]: With dead ends: 87614 [2022-11-18 18:29:23,604 INFO L226 Difference]: Without dead ends: 49571 [2022-11-18 18:29:23,628 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 [2022-11-18 18:29:23,629 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 454 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1364 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:29:23,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 348 Invalid, 1539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1364 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-18 18:29:23,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49571 states. [2022-11-18 18:29:24,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49571 to 38042. [2022-11-18 18:29:24,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38042 states, 38041 states have (on average 1.1311216844983045) internal successors, (43029), 38041 states have internal predecessors, (43029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:24,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38042 states to 38042 states and 43029 transitions. [2022-11-18 18:29:24,314 INFO L78 Accepts]: Start accepts. Automaton has 38042 states and 43029 transitions. Word has length 434 [2022-11-18 18:29:24,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:29:24,315 INFO L495 AbstractCegarLoop]: Abstraction has 38042 states and 43029 transitions. [2022-11-18 18:29:24,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:24,315 INFO L276 IsEmpty]: Start isEmpty. Operand 38042 states and 43029 transitions. [2022-11-18 18:29:24,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2022-11-18 18:29:24,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:29:24,327 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, 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, 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] [2022-11-18 18:29:24,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 18:29:24,328 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:29:24,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:29:24,328 INFO L85 PathProgramCache]: Analyzing trace with hash 2107532618, now seen corresponding path program 1 times [2022-11-18 18:29:24,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:29:24,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860573506] [2022-11-18 18:29:24,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:24,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:29:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:29:24,681 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2022-11-18 18:29:24,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:29:24,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860573506] [2022-11-18 18:29:24,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860573506] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:29:24,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:29:24,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:29:24,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766015885] [2022-11-18 18:29:24,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:29:24,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:29:24,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:29:24,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:29:24,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:29:24,686 INFO L87 Difference]: Start difference. First operand 38042 states and 43029 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:27,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:29:27,924 INFO L93 Difference]: Finished difference Result 90134 states and 101693 transitions. [2022-11-18 18:29:27,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:29:27,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 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 461 [2022-11-18 18:29:27,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:29:27,985 INFO L225 Difference]: With dead ends: 90134 [2022-11-18 18:29:27,985 INFO L226 Difference]: Without dead ends: 51668 [2022-11-18 18:29:28,010 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 [2022-11-18 18:29:28,011 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 489 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1313 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 1313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:29:28,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 299 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 1313 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-18 18:29:28,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51668 states. [2022-11-18 18:29:28,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51668 to 38441. [2022-11-18 18:29:28,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38441 states, 38440 states have (on average 1.1205515088449531) internal successors, (43074), 38440 states have internal predecessors, (43074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:28,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38441 states to 38441 states and 43074 transitions. [2022-11-18 18:29:28,570 INFO L78 Accepts]: Start accepts. Automaton has 38441 states and 43074 transitions. Word has length 461 [2022-11-18 18:29:28,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:29:28,571 INFO L495 AbstractCegarLoop]: Abstraction has 38441 states and 43074 transitions. [2022-11-18 18:29:28,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:28,571 INFO L276 IsEmpty]: Start isEmpty. Operand 38441 states and 43074 transitions. [2022-11-18 18:29:28,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2022-11-18 18:29:28,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:29:28,585 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:29:28,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-18 18:29:28,585 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:29:28,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:29:28,586 INFO L85 PathProgramCache]: Analyzing trace with hash -366325391, now seen corresponding path program 1 times [2022-11-18 18:29:28,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:29:28,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308973379] [2022-11-18 18:29:28,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:28,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:29:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:29:29,584 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 294 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-18 18:29:29,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:29:29,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308973379] [2022-11-18 18:29:29,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308973379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:29:29,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:29:29,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:29:29,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057178967] [2022-11-18 18:29:29,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:29:29,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:29:29,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:29:29,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:29:29,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:29:29,587 INFO L87 Difference]: Start difference. First operand 38441 states and 43074 transitions. Second operand has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:33,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:29:33,441 INFO L93 Difference]: Finished difference Result 88379 states and 98835 transitions. [2022-11-18 18:29:33,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:29:33,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 473 [2022-11-18 18:29:33,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:29:33,497 INFO L225 Difference]: With dead ends: 88379 [2022-11-18 18:29:33,498 INFO L226 Difference]: Without dead ends: 49515 [2022-11-18 18:29:33,509 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 [2022-11-18 18:29:33,510 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 879 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 1852 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 2212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 1852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:29:33,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [879 Valid, 305 Invalid, 2212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 1852 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-18 18:29:33,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49515 states. [2022-11-18 18:29:34,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49515 to 46100. [2022-11-18 18:29:34,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46100 states, 46099 states have (on average 1.1141673355170394) internal successors, (51362), 46099 states have internal predecessors, (51362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:34,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46100 states to 46100 states and 51362 transitions. [2022-11-18 18:29:34,089 INFO L78 Accepts]: Start accepts. Automaton has 46100 states and 51362 transitions. Word has length 473 [2022-11-18 18:29:34,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:29:34,089 INFO L495 AbstractCegarLoop]: Abstraction has 46100 states and 51362 transitions. [2022-11-18 18:29:34,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:34,090 INFO L276 IsEmpty]: Start isEmpty. Operand 46100 states and 51362 transitions. [2022-11-18 18:29:34,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2022-11-18 18:29:34,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:29:34,104 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:29:34,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-18 18:29:34,105 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:29:34,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:29:34,106 INFO L85 PathProgramCache]: Analyzing trace with hash 762951357, now seen corresponding path program 1 times [2022-11-18 18:29:34,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:29:34,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307395738] [2022-11-18 18:29:34,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:34,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:29:34,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:29:34,437 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-11-18 18:29:34,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:29:34,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307395738] [2022-11-18 18:29:34,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307395738] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:29:34,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:29:34,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:29:34,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241228616] [2022-11-18 18:29:34,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:29:34,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:29:34,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:29:34,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:29:34,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:29:34,440 INFO L87 Difference]: Start difference. First operand 46100 states and 51362 transitions. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:37,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:29:37,363 INFO L93 Difference]: Finished difference Result 99430 states and 110845 transitions. [2022-11-18 18:29:37,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:29:37,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 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 481 [2022-11-18 18:29:37,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:29:37,428 INFO L225 Difference]: With dead ends: 99430 [2022-11-18 18:29:37,428 INFO L226 Difference]: Without dead ends: 52906 [2022-11-18 18:29:37,449 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 [2022-11-18 18:29:37,449 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 475 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1226 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 1226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:29:37,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 256 Invalid, 1478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 1226 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-18 18:29:37,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52906 states. [2022-11-18 18:29:38,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52906 to 49922. [2022-11-18 18:29:38,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49922 states, 49921 states have (on average 1.1125378097393883) internal successors, (55539), 49921 states have internal predecessors, (55539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:38,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49922 states to 49922 states and 55539 transitions. [2022-11-18 18:29:38,454 INFO L78 Accepts]: Start accepts. Automaton has 49922 states and 55539 transitions. Word has length 481 [2022-11-18 18:29:38,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:29:38,455 INFO L495 AbstractCegarLoop]: Abstraction has 49922 states and 55539 transitions. [2022-11-18 18:29:38,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:38,456 INFO L276 IsEmpty]: Start isEmpty. Operand 49922 states and 55539 transitions. [2022-11-18 18:29:38,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2022-11-18 18:29:38,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:29:38,484 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, 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:29:38,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-18 18:29:38,485 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:29:38,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:29:38,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1600717154, now seen corresponding path program 1 times [2022-11-18 18:29:38,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:29:38,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402020397] [2022-11-18 18:29:38,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:38,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:29:38,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:29:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 405 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-11-18 18:29:39,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:29:39,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402020397] [2022-11-18 18:29:39,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402020397] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:29:39,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:29:39,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:29:39,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383588066] [2022-11-18 18:29:39,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:29:39,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:29:39,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:29:39,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:29:39,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:29:39,674 INFO L87 Difference]: Start difference. First operand 49922 states and 55539 transitions. Second operand has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:44,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:29:44,507 INFO L93 Difference]: Finished difference Result 127552 states and 141063 transitions. [2022-11-18 18:29:44,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:29:44,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 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 482 [2022-11-18 18:29:44,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:29:44,578 INFO L225 Difference]: With dead ends: 127552 [2022-11-18 18:29:44,578 INFO L226 Difference]: Without dead ends: 73798 [2022-11-18 18:29:44,593 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 [2022-11-18 18:29:44,594 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 747 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 2685 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 3053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 2685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:29:44,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [747 Valid, 279 Invalid, 3053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 2685 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-18 18:29:44,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73798 states. [2022-11-18 18:29:45,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73798 to 68227. [2022-11-18 18:29:45,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68227 states, 68226 states have (on average 1.1045495852021223) internal successors, (75359), 68226 states have internal predecessors, (75359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:45,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68227 states to 68227 states and 75359 transitions. [2022-11-18 18:29:45,712 INFO L78 Accepts]: Start accepts. Automaton has 68227 states and 75359 transitions. Word has length 482 [2022-11-18 18:29:45,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:29:45,713 INFO L495 AbstractCegarLoop]: Abstraction has 68227 states and 75359 transitions. [2022-11-18 18:29:45,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:45,713 INFO L276 IsEmpty]: Start isEmpty. Operand 68227 states and 75359 transitions. [2022-11-18 18:29:45,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2022-11-18 18:29:45,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:29:45,732 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:29:45,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-18 18:29:45,733 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:29:45,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:29:45,734 INFO L85 PathProgramCache]: Analyzing trace with hash -36721125, now seen corresponding path program 1 times [2022-11-18 18:29:45,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:29:45,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488686228] [2022-11-18 18:29:45,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:45,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:29:46,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:29:47,127 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 294 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-18 18:29:47,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:29:47,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488686228] [2022-11-18 18:29:47,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488686228] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:29:47,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:29:47,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:29:47,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831490289] [2022-11-18 18:29:47,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:29:47,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:29:47,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:29:47,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:29:47,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:29:47,130 INFO L87 Difference]: Start difference. First operand 68227 states and 75359 transitions. Second operand has 4 states, 4 states have (on average 101.25) internal successors, (405), 4 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:51,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:29:51,135 INFO L93 Difference]: Finished difference Result 144969 states and 159657 transitions. [2022-11-18 18:29:51,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:29:51,135 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 101.25) internal successors, (405), 4 states have internal predecessors, (405), 0 states have call successors, (0), 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 486 [2022-11-18 18:29:51,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:29:51,208 INFO L225 Difference]: With dead ends: 144969 [2022-11-18 18:29:51,208 INFO L226 Difference]: Without dead ends: 76319 [2022-11-18 18:29:51,353 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 [2022-11-18 18:29:51,353 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 646 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 2431 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 2641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 2431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:29:51,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 347 Invalid, 2641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 2431 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-18 18:29:51,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76319 states. [2022-11-18 18:29:52,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76319 to 70352. [2022-11-18 18:29:52,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70352 states, 70351 states have (on average 1.1026993219712584) internal successors, (77576), 70351 states have internal predecessors, (77576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:52,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70352 states to 70352 states and 77576 transitions. [2022-11-18 18:29:52,365 INFO L78 Accepts]: Start accepts. Automaton has 70352 states and 77576 transitions. Word has length 486 [2022-11-18 18:29:52,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:29:52,366 INFO L495 AbstractCegarLoop]: Abstraction has 70352 states and 77576 transitions. [2022-11-18 18:29:52,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.25) internal successors, (405), 4 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:52,366 INFO L276 IsEmpty]: Start isEmpty. Operand 70352 states and 77576 transitions. [2022-11-18 18:29:52,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2022-11-18 18:29:52,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:29:52,376 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:29:52,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-18 18:29:52,376 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:29:52,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:29:52,377 INFO L85 PathProgramCache]: Analyzing trace with hash -772383737, now seen corresponding path program 1 times [2022-11-18 18:29:52,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:29:52,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444592584] [2022-11-18 18:29:52,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:52,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:29:52,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:29:53,327 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 376 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:29:53,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:29:53,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444592584] [2022-11-18 18:29:53,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444592584] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:29:53,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:29:53,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:29:53,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096845986] [2022-11-18 18:29:53,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:29:53,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:29:53,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:29:53,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:29:53,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:29:53,331 INFO L87 Difference]: Start difference. First operand 70352 states and 77576 transitions. Second operand has 4 states, 4 states have (on average 123.5) internal successors, (494), 4 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:57,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:29:57,738 INFO L93 Difference]: Finished difference Result 165422 states and 181962 transitions. [2022-11-18 18:29:57,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:29:57,738 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 123.5) internal successors, (494), 4 states have internal predecessors, (494), 0 states have call successors, (0), 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 494 [2022-11-18 18:29:57,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:29:57,826 INFO L225 Difference]: With dead ends: 165422 [2022-11-18 18:29:57,826 INFO L226 Difference]: Without dead ends: 95072 [2022-11-18 18:29:57,846 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 [2022-11-18 18:29:57,847 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 639 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 435 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 2769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 435 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:29:57,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 177 Invalid, 2769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [435 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-18 18:29:57,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95072 states. [2022-11-18 18:29:58,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95072 to 91234. [2022-11-18 18:29:59,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91234 states, 91233 states have (on average 1.0973332018019795) internal successors, (100113), 91233 states have internal predecessors, (100113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:59,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91234 states to 91234 states and 100113 transitions. [2022-11-18 18:29:59,161 INFO L78 Accepts]: Start accepts. Automaton has 91234 states and 100113 transitions. Word has length 494 [2022-11-18 18:29:59,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:29:59,162 INFO L495 AbstractCegarLoop]: Abstraction has 91234 states and 100113 transitions. [2022-11-18 18:29:59,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 123.5) internal successors, (494), 4 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:59,162 INFO L276 IsEmpty]: Start isEmpty. Operand 91234 states and 100113 transitions. [2022-11-18 18:29:59,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2022-11-18 18:29:59,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:29:59,176 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 18:29:59,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-18 18:29:59,177 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:29:59,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:29:59,178 INFO L85 PathProgramCache]: Analyzing trace with hash -506109535, now seen corresponding path program 1 times [2022-11-18 18:29:59,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:29:59,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993610720] [2022-11-18 18:29:59,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:59,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:29:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:00,809 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 337 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-18 18:30:00,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:00,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993610720] [2022-11-18 18:30:00,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993610720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:30:00,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:30:00,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:30:00,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845134179] [2022-11-18 18:30:00,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:30:00,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:30:00,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:30:00,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:30:00,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:30:00,814 INFO L87 Difference]: Start difference. First operand 91234 states and 100113 transitions. Second operand has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:04,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:30:04,794 INFO L93 Difference]: Finished difference Result 200356 states and 219559 transitions. [2022-11-18 18:30:04,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:30:04,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 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 529 [2022-11-18 18:30:04,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:30:04,944 INFO L225 Difference]: With dead ends: 200356 [2022-11-18 18:30:04,945 INFO L226 Difference]: Without dead ends: 108699 [2022-11-18 18:30:04,986 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 [2022-11-18 18:30:04,987 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 873 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1786 mSolverCounterSat, 413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 2199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 1786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:30:04,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 264 Invalid, 2199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [413 Valid, 1786 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-18 18:30:05,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108699 states. [2022-11-18 18:30:06,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108699 to 95070. [2022-11-18 18:30:06,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95070 states, 95069 states have (on average 1.0965509261694137) internal successors, (104248), 95069 states have internal predecessors, (104248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:06,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95070 states to 95070 states and 104248 transitions. [2022-11-18 18:30:06,742 INFO L78 Accepts]: Start accepts. Automaton has 95070 states and 104248 transitions. Word has length 529 [2022-11-18 18:30:06,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:30:06,743 INFO L495 AbstractCegarLoop]: Abstraction has 95070 states and 104248 transitions. [2022-11-18 18:30:06,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:06,743 INFO L276 IsEmpty]: Start isEmpty. Operand 95070 states and 104248 transitions. [2022-11-18 18:30:06,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2022-11-18 18:30:06,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:30:06,997 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 18:30:06,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-18 18:30:06,997 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:30:06,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:06,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1449863565, now seen corresponding path program 1 times [2022-11-18 18:30:06,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:06,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116589619] [2022-11-18 18:30:06,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:06,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:07,843 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-11-18 18:30:07,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:07,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116589619] [2022-11-18 18:30:07,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116589619] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:30:07,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:30:07,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:30:07,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411602334] [2022-11-18 18:30:07,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:30:07,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:30:07,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:30:07,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:30:07,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:30:07,847 INFO L87 Difference]: Start difference. First operand 95070 states and 104248 transitions. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:10,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:30:10,803 INFO L93 Difference]: Finished difference Result 200773 states and 219478 transitions. [2022-11-18 18:30:10,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:30:10,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 537 [2022-11-18 18:30:10,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:30:10,931 INFO L225 Difference]: With dead ends: 200773 [2022-11-18 18:30:10,931 INFO L226 Difference]: Without dead ends: 105279 [2022-11-18 18:30:10,974 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 [2022-11-18 18:30:10,975 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 437 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:30:10,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 358 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-18 18:30:11,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105279 states. [2022-11-18 18:30:12,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105279 to 93367. [2022-11-18 18:30:12,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93367 states, 93366 states have (on average 1.094798963220016) internal successors, (102217), 93366 states have internal predecessors, (102217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:12,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93367 states to 93367 states and 102217 transitions. [2022-11-18 18:30:12,617 INFO L78 Accepts]: Start accepts. Automaton has 93367 states and 102217 transitions. Word has length 537 [2022-11-18 18:30:12,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:30:12,618 INFO L495 AbstractCegarLoop]: Abstraction has 93367 states and 102217 transitions. [2022-11-18 18:30:12,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:12,618 INFO L276 IsEmpty]: Start isEmpty. Operand 93367 states and 102217 transitions. [2022-11-18 18:30:12,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2022-11-18 18:30:12,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:30:12,631 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:30:12,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-18 18:30:12,632 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:30:12,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:12,632 INFO L85 PathProgramCache]: Analyzing trace with hash 543509281, now seen corresponding path program 1 times [2022-11-18 18:30:12,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:12,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167909137] [2022-11-18 18:30:12,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:12,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:12,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:13,744 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-11-18 18:30:13,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:13,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167909137] [2022-11-18 18:30:13,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167909137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:30:13,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:30:13,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:30:13,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763022993] [2022-11-18 18:30:13,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:30:13,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:30:13,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:30:13,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:30:13,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:30:13,750 INFO L87 Difference]: Start difference. First operand 93367 states and 102217 transitions. Second operand has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:16,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:30:16,377 INFO L93 Difference]: Finished difference Result 186730 states and 204430 transitions. [2022-11-18 18:30:16,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:30:16,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 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 [2022-11-18 18:30:16,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:30:16,487 INFO L225 Difference]: With dead ends: 186730 [2022-11-18 18:30:16,487 INFO L226 Difference]: Without dead ends: 93364 [2022-11-18 18:30:16,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:30:16,524 INFO L413 NwaCegarLoop]: 535 mSDtfsCounter, 590 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:30:16,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [590 Valid, 555 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-18 18:30:16,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93364 states. [2022-11-18 18:30:17,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93364 to 93363. [2022-11-18 18:30:17,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93363 states, 93362 states have (on average 1.0944067179366337) internal successors, (102176), 93362 states have internal predecessors, (102176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:17,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93363 states to 93363 states and 102176 transitions. [2022-11-18 18:30:17,911 INFO L78 Accepts]: Start accepts. Automaton has 93363 states and 102176 transitions. Word has length 542 [2022-11-18 18:30:17,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:30:17,911 INFO L495 AbstractCegarLoop]: Abstraction has 93363 states and 102176 transitions. [2022-11-18 18:30:17,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:17,912 INFO L276 IsEmpty]: Start isEmpty. Operand 93363 states and 102176 transitions. [2022-11-18 18:30:17,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2022-11-18 18:30:17,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:30:17,925 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, 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, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:30:17,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-18 18:30:17,925 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:30:17,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:17,926 INFO L85 PathProgramCache]: Analyzing trace with hash 830414148, now seen corresponding path program 1 times [2022-11-18 18:30:17,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:17,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442305876] [2022-11-18 18:30:17,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:17,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:18,937 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 600 proven. 0 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2022-11-18 18:30:18,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:18,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442305876] [2022-11-18 18:30:18,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442305876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:30:18,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:30:18,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 18:30:18,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186227432] [2022-11-18 18:30:18,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:30:18,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 18:30:18,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:30:18,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 18:30:18,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:30:18,940 INFO L87 Difference]: Start difference. First operand 93363 states and 102176 transitions. Second operand has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:25,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:30:25,262 INFO L93 Difference]: Finished difference Result 236532 states and 258704 transitions. [2022-11-18 18:30:25,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:30:25,263 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 0 states have call successors, (0), 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 553 [2022-11-18 18:30:25,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:30:25,436 INFO L225 Difference]: With dead ends: 236532 [2022-11-18 18:30:25,436 INFO L226 Difference]: Without dead ends: 140621 [2022-11-18 18:30:25,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:30:25,497 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 1373 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 3258 mSolverCounterSat, 723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 3981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 723 IncrementalHoareTripleChecker+Valid, 3258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:30:25,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1373 Valid, 204 Invalid, 3981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [723 Valid, 3258 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-18 18:30:25,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140621 states. [2022-11-18 18:30:27,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140621 to 124878. [2022-11-18 18:30:27,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124878 states, 124877 states have (on average 1.0846753205153872) internal successors, (135451), 124877 states have internal predecessors, (135451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:27,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124878 states to 124878 states and 135451 transitions. [2022-11-18 18:30:27,731 INFO L78 Accepts]: Start accepts. Automaton has 124878 states and 135451 transitions. Word has length 553 [2022-11-18 18:30:27,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:30:27,732 INFO L495 AbstractCegarLoop]: Abstraction has 124878 states and 135451 transitions. [2022-11-18 18:30:27,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:27,732 INFO L276 IsEmpty]: Start isEmpty. Operand 124878 states and 135451 transitions. [2022-11-18 18:30:27,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2022-11-18 18:30:27,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:30:27,748 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, 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, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:30:27,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-18 18:30:27,748 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:30:27,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:27,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1127097331, now seen corresponding path program 1 times [2022-11-18 18:30:27,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:27,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442279730] [2022-11-18 18:30:27,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:27,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:27,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:28,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 705 proven. 0 refuted. 0 times theorem prover too weak. 649 trivial. 0 not checked. [2022-11-18 18:30:28,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:28,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442279730] [2022-11-18 18:30:28,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442279730] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:30:28,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:30:28,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:30:28,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823855335] [2022-11-18 18:30:28,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:30:28,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:30:28,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:30:28,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:30:28,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:30:28,565 INFO L87 Difference]: Start difference. First operand 124878 states and 135451 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:30,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:30:30,733 INFO L93 Difference]: Finished difference Result 247190 states and 267917 transitions. [2022-11-18 18:30:30,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:30:30,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 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 570 [2022-11-18 18:30:30,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:30:31,319 INFO L225 Difference]: With dead ends: 247190 [2022-11-18 18:30:31,319 INFO L226 Difference]: Without dead ends: 122314 [2022-11-18 18:30:31,375 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 [2022-11-18 18:30:31,377 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 630 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:30:31,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [630 Valid, 103 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-18 18:30:31,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122314 states. [2022-11-18 18:30:33,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122314 to 122306. [2022-11-18 18:30:33,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122306 states, 122305 states have (on average 1.082801193736969) internal successors, (132432), 122305 states have internal predecessors, (132432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:33,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122306 states to 122306 states and 132432 transitions. [2022-11-18 18:30:33,448 INFO L78 Accepts]: Start accepts. Automaton has 122306 states and 132432 transitions. Word has length 570 [2022-11-18 18:30:33,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:30:33,449 INFO L495 AbstractCegarLoop]: Abstraction has 122306 states and 132432 transitions. [2022-11-18 18:30:33,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:30:33,449 INFO L276 IsEmpty]: Start isEmpty. Operand 122306 states and 132432 transitions. [2022-11-18 18:30:33,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2022-11-18 18:30:33,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:30:33,468 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:30:33,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-18 18:30:33,469 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:30:33,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:30:33,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1503647268, now seen corresponding path program 1 times [2022-11-18 18:30:33,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:30:33,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338033654] [2022-11-18 18:30:33,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:33,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:30:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:35,317 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 483 proven. 36 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-11-18 18:30:35,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:30:35,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338033654] [2022-11-18 18:30:35,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338033654] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:30:35,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144412104] [2022-11-18 18:30:35,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:30:35,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:30:35,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd9a164a-4de5-42da-90fb-01ba8bbff655/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:30:35,322 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd9a164a-4de5-42da-90fb-01ba8bbff655/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:30:35,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd9a164a-4de5-42da-90fb-01ba8bbff655/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:30:35,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:30:35,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 18:30:35,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:30:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 529 proven. 82 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-18 18:30:36,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:30:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 529 proven. 82 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-18 18:30:38,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144412104] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:30:38,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:30:38,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2022-11-18 18:30:38,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964498176] [2022-11-18 18:30:38,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:30:38,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 18:30:38,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:30:38,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 18:30:38,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:30:38,434 INFO L87 Difference]: Start difference. First operand 122306 states and 132432 transitions. Second operand has 9 states, 9 states have (on average 122.77777777777777) internal successors, (1105), 9 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)