./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label45.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_879c77a7-2eac-4914-ae9a-0c465c8a96da/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879c77a7-2eac-4914-ae9a-0c465c8a96da/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_879c77a7-2eac-4914-ae9a-0c465c8a96da/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879c77a7-2eac-4914-ae9a-0c465c8a96da/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label45.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879c77a7-2eac-4914-ae9a-0c465c8a96da/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_879c77a7-2eac-4914-ae9a-0c465c8a96da/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 e46cda06cd6f3e72cb5a00e680e37793de7d3fd440c55f6638f7eefc5d4b52af --- 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 21:11:15,956 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 21:11:15,959 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 21:11:15,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 21:11:15,997 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 21:11:15,999 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 21:11:16,001 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 21:11:16,006 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 21:11:16,010 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 21:11:16,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 21:11:16,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 21:11:16,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 21:11:16,018 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 21:11:16,021 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 21:11:16,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 21:11:16,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 21:11:16,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 21:11:16,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 21:11:16,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 21:11:16,039 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 21:11:16,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 21:11:16,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 21:11:16,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 21:11:16,048 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 21:11:16,052 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 21:11:16,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 21:11:16,058 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 21:11:16,059 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 21:11:16,061 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 21:11:16,062 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 21:11:16,063 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 21:11:16,063 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 21:11:16,065 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 21:11:16,067 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 21:11:16,069 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 21:11:16,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 21:11:16,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 21:11:16,071 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 21:11:16,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 21:11:16,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 21:11:16,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 21:11:16,074 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879c77a7-2eac-4914-ae9a-0c465c8a96da/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 21:11:16,114 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 21:11:16,114 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 21:11:16,115 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 21:11:16,115 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 21:11:16,116 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 21:11:16,116 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 21:11:16,117 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 21:11:16,117 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 21:11:16,118 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 21:11:16,118 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 21:11:16,119 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 21:11:16,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 21:11:16,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 21:11:16,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 21:11:16,121 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 21:11:16,121 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 21:11:16,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 21:11:16,122 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 21:11:16,122 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 21:11:16,122 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 21:11:16,122 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 21:11:16,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 21:11:16,123 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 21:11:16,123 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 21:11:16,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 21:11:16,124 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 21:11:16,124 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 21:11:16,125 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 21:11:16,125 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 21:11:16,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 21:11:16,126 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 21:11:16,126 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 21:11:16,126 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 21:11:16,127 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_879c77a7-2eac-4914-ae9a-0c465c8a96da/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879c77a7-2eac-4914-ae9a-0c465c8a96da/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e46cda06cd6f3e72cb5a00e680e37793de7d3fd440c55f6638f7eefc5d4b52af [2022-11-18 21:11:16,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 21:11:16,452 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 21:11:16,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 21:11:16,457 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 21:11:16,458 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 21:11:16,460 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879c77a7-2eac-4914-ae9a-0c465c8a96da/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/eca-rers2012/Problem03_label45.c [2022-11-18 21:11:16,528 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879c77a7-2eac-4914-ae9a-0c465c8a96da/bin/uautomizer-TMbwUNV5ro/data/5b616ee9d/7becdb0990424f3ea627d4055062b8c3/FLAG631b3d3cf [2022-11-18 21:11:17,205 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 21:11:17,206 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879c77a7-2eac-4914-ae9a-0c465c8a96da/sv-benchmarks/c/eca-rers2012/Problem03_label45.c [2022-11-18 21:11:17,230 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879c77a7-2eac-4914-ae9a-0c465c8a96da/bin/uautomizer-TMbwUNV5ro/data/5b616ee9d/7becdb0990424f3ea627d4055062b8c3/FLAG631b3d3cf [2022-11-18 21:11:17,495 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879c77a7-2eac-4914-ae9a-0c465c8a96da/bin/uautomizer-TMbwUNV5ro/data/5b616ee9d/7becdb0990424f3ea627d4055062b8c3 [2022-11-18 21:11:17,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 21:11:17,500 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 21:11:17,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 21:11:17,504 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 21:11:17,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 21:11:17,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:11:17" (1/1) ... [2022-11-18 21:11:17,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ad4be55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:17, skipping insertion in model container [2022-11-18 21:11:17,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:11:17" (1/1) ... [2022-11-18 21:11:17,517 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 21:11:17,606 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 21:11:18,292 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_879c77a7-2eac-4914-ae9a-0c465c8a96da/sv-benchmarks/c/eca-rers2012/Problem03_label45.c[53653,53666] [2022-11-18 21:11:18,333 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 21:11:18,342 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 21:11:18,581 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_879c77a7-2eac-4914-ae9a-0c465c8a96da/sv-benchmarks/c/eca-rers2012/Problem03_label45.c[53653,53666] [2022-11-18 21:11:18,603 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 21:11:18,622 INFO L208 MainTranslator]: Completed translation [2022-11-18 21:11:18,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:18 WrapperNode [2022-11-18 21:11:18,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 21:11:18,624 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 21:11:18,624 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 21:11:18,624 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 21:11:18,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:18" (1/1) ... [2022-11-18 21:11:18,676 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:18" (1/1) ... [2022-11-18 21:11:18,814 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-11-18 21:11:18,814 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 21:11:18,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 21:11:18,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 21:11:18,815 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 21:11:18,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:18" (1/1) ... [2022-11-18 21:11:18,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:18" (1/1) ... [2022-11-18 21:11:18,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:18" (1/1) ... [2022-11-18 21:11:18,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:18" (1/1) ... [2022-11-18 21:11:18,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:18" (1/1) ... [2022-11-18 21:11:18,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:18" (1/1) ... [2022-11-18 21:11:18,975 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:18" (1/1) ... [2022-11-18 21:11:18,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:18" (1/1) ... [2022-11-18 21:11:18,997 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 21:11:18,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 21:11:19,000 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 21:11:19,000 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 21:11:19,001 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:18" (1/1) ... [2022-11-18 21:11:19,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 21:11:19,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879c77a7-2eac-4914-ae9a-0c465c8a96da/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:11:19,040 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879c77a7-2eac-4914-ae9a-0c465c8a96da/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 21:11:19,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879c77a7-2eac-4914-ae9a-0c465c8a96da/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 21:11:19,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 21:11:19,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 21:11:19,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 21:11:19,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 21:11:19,189 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 21:11:19,192 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 21:11:21,210 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 21:11:21,229 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 21:11:21,229 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-18 21:11:21,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:11:21 BoogieIcfgContainer [2022-11-18 21:11:21,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 21:11:21,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 21:11:21,235 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 21:11:21,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 21:11:21,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 09:11:17" (1/3) ... [2022-11-18 21:11:21,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d2c2f8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:11:21, skipping insertion in model container [2022-11-18 21:11:21,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:11:18" (2/3) ... [2022-11-18 21:11:21,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d2c2f8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:11:21, skipping insertion in model container [2022-11-18 21:11:21,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:11:21" (3/3) ... [2022-11-18 21:11:21,241 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label45.c [2022-11-18 21:11:21,260 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 21:11:21,260 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 21:11:21,322 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 21:11:21,329 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;@da798b1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 21:11:21,329 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 21:11:21,339 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 21:11:21,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-18 21:11:21,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:21,361 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:11:21,362 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:11:21,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:21,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1107694590, now seen corresponding path program 1 times [2022-11-18 21:11:21,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:21,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796284531] [2022-11-18 21:11:21,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:21,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:21,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:22,518 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 21:11:22,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:22,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796284531] [2022-11-18 21:11:22,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796284531] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:11:22,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:11:22,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:11:22,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489826644] [2022-11-18 21:11:22,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:22,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:11:22,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:22,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:11:22,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:11:22,578 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 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 21:11:23,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:23,960 INFO L93 Difference]: Finished difference Result 840 states and 1490 transitions. [2022-11-18 21:11:23,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:11:23,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 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 144 [2022-11-18 21:11:23,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:23,991 INFO L225 Difference]: With dead ends: 840 [2022-11-18 21:11:23,991 INFO L226 Difference]: Without dead ends: 460 [2022-11-18 21:11:23,995 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 21:11:23,998 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 120 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:23,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 134 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-18 21:11:24,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-11-18 21:11:24,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 445. [2022-11-18 21:11:24,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 1.614864864864865) internal successors, (717), 444 states have internal predecessors, (717), 0 states have call successors, (0), 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 21:11:24,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 717 transitions. [2022-11-18 21:11:24,096 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 717 transitions. Word has length 144 [2022-11-18 21:11:24,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:24,097 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 717 transitions. [2022-11-18 21:11:24,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 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 21:11:24,098 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 717 transitions. [2022-11-18 21:11:24,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-18 21:11:24,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:24,101 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:11:24,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 21:11:24,101 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:11:24,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:24,102 INFO L85 PathProgramCache]: Analyzing trace with hash -235311730, now seen corresponding path program 1 times [2022-11-18 21:11:24,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:24,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326393862] [2022-11-18 21:11:24,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:24,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:24,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:24,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:11:24,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:24,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326393862] [2022-11-18 21:11:24,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326393862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:11:24,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:11:24,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:11:24,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115427469] [2022-11-18 21:11:24,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:24,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:11:24,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:24,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:11:24,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:11:24,528 INFO L87 Difference]: Start difference. First operand 445 states and 717 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 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 21:11:25,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:25,587 INFO L93 Difference]: Finished difference Result 1324 states and 2138 transitions. [2022-11-18 21:11:25,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:11:25,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 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 150 [2022-11-18 21:11:25,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:25,594 INFO L225 Difference]: With dead ends: 1324 [2022-11-18 21:11:25,594 INFO L226 Difference]: Without dead ends: 881 [2022-11-18 21:11:25,596 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 21:11:25,597 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:25,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 125 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 21:11:25,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-11-18 21:11:25,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 877. [2022-11-18 21:11:25,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 1.595890410958904) internal successors, (1398), 876 states have internal predecessors, (1398), 0 states have call successors, (0), 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 21:11:25,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1398 transitions. [2022-11-18 21:11:25,648 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1398 transitions. Word has length 150 [2022-11-18 21:11:25,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:25,649 INFO L495 AbstractCegarLoop]: Abstraction has 877 states and 1398 transitions. [2022-11-18 21:11:25,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 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 21:11:25,649 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1398 transitions. [2022-11-18 21:11:25,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-18 21:11:25,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:25,654 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-18 21:11:25,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 21:11:25,655 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:11:25,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:25,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1640240486, now seen corresponding path program 1 times [2022-11-18 21:11:25,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:25,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361902186] [2022-11-18 21:11:25,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:25,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:25,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:25,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:11:25,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:25,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361902186] [2022-11-18 21:11:25,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361902186] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:11:25,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:11:25,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:11:25,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678889185] [2022-11-18 21:11:25,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:25,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:11:25,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:25,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:11:25,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:11:25,958 INFO L87 Difference]: Start difference. First operand 877 states and 1398 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 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 21:11:26,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:26,985 INFO L93 Difference]: Finished difference Result 2565 states and 4101 transitions. [2022-11-18 21:11:26,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:11:26,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 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 150 [2022-11-18 21:11:26,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:26,992 INFO L225 Difference]: With dead ends: 2565 [2022-11-18 21:11:26,992 INFO L226 Difference]: Without dead ends: 1690 [2022-11-18 21:11:26,994 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 21:11:26,995 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 216 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:26,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 192 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 21:11:26,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2022-11-18 21:11:27,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1690. [2022-11-18 21:11:27,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 1.3860272350503255) internal successors, (2341), 1689 states have internal predecessors, (2341), 0 states have call successors, (0), 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 21:11:27,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 2341 transitions. [2022-11-18 21:11:27,049 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 2341 transitions. Word has length 150 [2022-11-18 21:11:27,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:27,050 INFO L495 AbstractCegarLoop]: Abstraction has 1690 states and 2341 transitions. [2022-11-18 21:11:27,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 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 21:11:27,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 2341 transitions. [2022-11-18 21:11:27,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-18 21:11:27,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:27,054 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-18 21:11:27,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 21:11:27,055 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:11:27,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:27,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1267325975, now seen corresponding path program 1 times [2022-11-18 21:11:27,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:27,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439902946] [2022-11-18 21:11:27,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:27,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:27,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:27,405 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:11:27,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:27,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439902946] [2022-11-18 21:11:27,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439902946] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:11:27,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:11:27,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:11:27,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755009763] [2022-11-18 21:11:27,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:27,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:11:27,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:27,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:11:27,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:11:27,409 INFO L87 Difference]: Start difference. First operand 1690 states and 2341 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 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 21:11:28,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:28,422 INFO L93 Difference]: Finished difference Result 5048 states and 6998 transitions. [2022-11-18 21:11:28,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:11:28,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 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 156 [2022-11-18 21:11:28,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:28,434 INFO L225 Difference]: With dead ends: 5048 [2022-11-18 21:11:28,434 INFO L226 Difference]: Without dead ends: 3360 [2022-11-18 21:11:28,436 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 21:11:28,437 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 275 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:28,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 206 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-18 21:11:28,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2022-11-18 21:11:28,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 3351. [2022-11-18 21:11:28,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3351 states, 3350 states have (on average 1.3722388059701494) internal successors, (4597), 3350 states have internal predecessors, (4597), 0 states have call successors, (0), 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 21:11:28,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3351 states to 3351 states and 4597 transitions. [2022-11-18 21:11:28,515 INFO L78 Accepts]: Start accepts. Automaton has 3351 states and 4597 transitions. Word has length 156 [2022-11-18 21:11:28,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:28,515 INFO L495 AbstractCegarLoop]: Abstraction has 3351 states and 4597 transitions. [2022-11-18 21:11:28,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 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 21:11:28,516 INFO L276 IsEmpty]: Start isEmpty. Operand 3351 states and 4597 transitions. [2022-11-18 21:11:28,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-18 21:11:28,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:28,521 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:28,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 21:11:28,521 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:11:28,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:28,522 INFO L85 PathProgramCache]: Analyzing trace with hash -267079187, now seen corresponding path program 1 times [2022-11-18 21:11:28,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:28,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711289386] [2022-11-18 21:11:28,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:28,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:28,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:28,672 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 21:11:28,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:28,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711289386] [2022-11-18 21:11:28,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711289386] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:11:28,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:11:28,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:11:28,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351872291] [2022-11-18 21:11:28,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:28,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:11:28,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:28,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:11:28,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:11:28,676 INFO L87 Difference]: Start difference. First operand 3351 states and 4597 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 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 21:11:29,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:29,749 INFO L93 Difference]: Finished difference Result 9992 states and 13723 transitions. [2022-11-18 21:11:29,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:11:29,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 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 158 [2022-11-18 21:11:29,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:29,771 INFO L225 Difference]: With dead ends: 9992 [2022-11-18 21:11:29,772 INFO L226 Difference]: Without dead ends: 6643 [2022-11-18 21:11:29,776 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 21:11:29,778 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:29,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 92 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 21:11:29,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6643 states. [2022-11-18 21:11:29,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6643 to 6605. [2022-11-18 21:11:29,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6605 states, 6604 states have (on average 1.3452453058752272) internal successors, (8884), 6604 states have internal predecessors, (8884), 0 states have call successors, (0), 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 21:11:29,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6605 states to 6605 states and 8884 transitions. [2022-11-18 21:11:29,931 INFO L78 Accepts]: Start accepts. Automaton has 6605 states and 8884 transitions. Word has length 158 [2022-11-18 21:11:29,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:29,932 INFO L495 AbstractCegarLoop]: Abstraction has 6605 states and 8884 transitions. [2022-11-18 21:11:29,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 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 21:11:29,936 INFO L276 IsEmpty]: Start isEmpty. Operand 6605 states and 8884 transitions. [2022-11-18 21:11:29,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-18 21:11:29,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:29,945 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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] [2022-11-18 21:11:29,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 21:11:29,947 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:11:29,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:29,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1504485225, now seen corresponding path program 1 times [2022-11-18 21:11:29,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:29,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243256908] [2022-11-18 21:11:29,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:29,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:30,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-18 21:11:30,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:30,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243256908] [2022-11-18 21:11:30,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243256908] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:11:30,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:11:30,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:11:30,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368141999] [2022-11-18 21:11:30,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:30,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:11:30,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:30,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:11:30,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:11:30,347 INFO L87 Difference]: Start difference. First operand 6605 states and 8884 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 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 21:11:31,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:31,412 INFO L93 Difference]: Finished difference Result 17695 states and 24239 transitions. [2022-11-18 21:11:31,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:11:31,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 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 172 [2022-11-18 21:11:31,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:31,446 INFO L225 Difference]: With dead ends: 17695 [2022-11-18 21:11:31,446 INFO L226 Difference]: Without dead ends: 11092 [2022-11-18 21:11:31,454 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 21:11:31,455 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 216 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:31,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 364 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-18 21:11:31,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11092 states. [2022-11-18 21:11:31,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11092 to 11082. [2022-11-18 21:11:31,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11082 states, 11081 states have (on average 1.2974460788737479) internal successors, (14377), 11081 states have internal predecessors, (14377), 0 states have call successors, (0), 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 21:11:31,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11082 states to 11082 states and 14377 transitions. [2022-11-18 21:11:31,739 INFO L78 Accepts]: Start accepts. Automaton has 11082 states and 14377 transitions. Word has length 172 [2022-11-18 21:11:31,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:31,740 INFO L495 AbstractCegarLoop]: Abstraction has 11082 states and 14377 transitions. [2022-11-18 21:11:31,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 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 21:11:31,740 INFO L276 IsEmpty]: Start isEmpty. Operand 11082 states and 14377 transitions. [2022-11-18 21:11:31,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-11-18 21:11:31,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:31,757 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:31,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 21:11:31,758 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:11:31,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:31,758 INFO L85 PathProgramCache]: Analyzing trace with hash 2111621614, now seen corresponding path program 1 times [2022-11-18 21:11:31,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:31,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597409934] [2022-11-18 21:11:31,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:31,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:32,251 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:11:32,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:32,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597409934] [2022-11-18 21:11:32,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597409934] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:11:32,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012432481] [2022-11-18 21:11:32,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:32,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:11:32,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879c77a7-2eac-4914-ae9a-0c465c8a96da/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:11:32,257 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879c77a7-2eac-4914-ae9a-0c465c8a96da/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:11:32,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879c77a7-2eac-4914-ae9a-0c465c8a96da/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 21:11:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:32,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 21:11:32,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:32,535 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 21:11:32,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:11:32,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012432481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:11:32,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:11:32,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-18 21:11:32,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341746335] [2022-11-18 21:11:32,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:32,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:11:32,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:32,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:11:32,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:11:32,538 INFO L87 Difference]: Start difference. First operand 11082 states and 14377 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 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 21:11:33,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:33,677 INFO L93 Difference]: Finished difference Result 31946 states and 41599 transitions. [2022-11-18 21:11:33,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:11:33,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 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 181 [2022-11-18 21:11:33,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:33,720 INFO L225 Difference]: With dead ends: 31946 [2022-11-18 21:11:33,721 INFO L226 Difference]: Without dead ends: 20866 [2022-11-18 21:11:33,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:11:33,736 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 230 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:33,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 206 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 21:11:33,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20866 states. [2022-11-18 21:11:34,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20866 to 20862. [2022-11-18 21:11:34,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20862 states, 20861 states have (on average 1.268012079957816) internal successors, (26452), 20861 states have internal predecessors, (26452), 0 states have call successors, (0), 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 21:11:34,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20862 states to 20862 states and 26452 transitions. [2022-11-18 21:11:34,175 INFO L78 Accepts]: Start accepts. Automaton has 20862 states and 26452 transitions. Word has length 181 [2022-11-18 21:11:34,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:34,175 INFO L495 AbstractCegarLoop]: Abstraction has 20862 states and 26452 transitions. [2022-11-18 21:11:34,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 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 21:11:34,177 INFO L276 IsEmpty]: Start isEmpty. Operand 20862 states and 26452 transitions. [2022-11-18 21:11:34,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-11-18 21:11:34,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:34,196 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 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] [2022-11-18 21:11:34,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879c77a7-2eac-4914-ae9a-0c465c8a96da/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 21:11:34,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879c77a7-2eac-4914-ae9a-0c465c8a96da/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 21:11:34,403 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:11:34,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:34,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1871477101, now seen corresponding path program 1 times [2022-11-18 21:11:34,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:34,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554045522] [2022-11-18 21:11:34,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:34,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:34,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:34,855 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-18 21:11:34,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:34,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554045522] [2022-11-18 21:11:34,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554045522] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:11:34,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:11:34,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:11:34,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35155564] [2022-11-18 21:11:34,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:34,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:11:34,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:34,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:11:34,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:11:34,859 INFO L87 Difference]: Start difference. First operand 20862 states and 26452 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 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 21:11:36,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:36,024 INFO L93 Difference]: Finished difference Result 48864 states and 62100 transitions. [2022-11-18 21:11:36,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:11:36,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 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 185 [2022-11-18 21:11:36,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:36,080 INFO L225 Difference]: With dead ends: 48864 [2022-11-18 21:11:36,081 INFO L226 Difference]: Without dead ends: 28004 [2022-11-18 21:11:36,103 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 21:11:36,104 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 214 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:36,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 361 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-18 21:11:36,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28004 states. [2022-11-18 21:11:36,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28004 to 27969. [2022-11-18 21:11:36,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27969 states, 27968 states have (on average 1.2254362128146452) internal successors, (34273), 27968 states have internal predecessors, (34273), 0 states have call successors, (0), 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 21:11:36,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27969 states to 27969 states and 34273 transitions. [2022-11-18 21:11:36,606 INFO L78 Accepts]: Start accepts. Automaton has 27969 states and 34273 transitions. Word has length 185 [2022-11-18 21:11:36,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:36,608 INFO L495 AbstractCegarLoop]: Abstraction has 27969 states and 34273 transitions. [2022-11-18 21:11:36,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 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 21:11:36,608 INFO L276 IsEmpty]: Start isEmpty. Operand 27969 states and 34273 transitions. [2022-11-18 21:11:36,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-11-18 21:11:36,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:36,634 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:36,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 21:11:36,634 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:11:36,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:36,635 INFO L85 PathProgramCache]: Analyzing trace with hash 564235399, now seen corresponding path program 1 times [2022-11-18 21:11:36,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:36,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771186834] [2022-11-18 21:11:36,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:36,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:36,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:37,046 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 21:11:37,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:37,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771186834] [2022-11-18 21:11:37,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771186834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:11:37,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:11:37,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:11:37,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991753011] [2022-11-18 21:11:37,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:37,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:11:37,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:37,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:11:37,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:11:37,049 INFO L87 Difference]: Start difference. First operand 27969 states and 34273 transitions. Second operand has 4 states, 4 states have (on average 48.75) 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 21:11:38,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:38,274 INFO L93 Difference]: Finished difference Result 50148 states and 61194 transitions. [2022-11-18 21:11:38,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:11:38,275 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.75) 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 200 [2022-11-18 21:11:38,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:38,317 INFO L225 Difference]: With dead ends: 50148 [2022-11-18 21:11:38,318 INFO L226 Difference]: Without dead ends: 22384 [2022-11-18 21:11:38,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:11:38,348 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 464 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:38,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 54 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 21:11:38,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22384 states. [2022-11-18 21:11:38,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22384 to 22384. [2022-11-18 21:11:38,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22384 states, 22383 states have (on average 1.1557878747263548) internal successors, (25870), 22383 states have internal predecessors, (25870), 0 states have call successors, (0), 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 21:11:38,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22384 states to 22384 states and 25870 transitions. [2022-11-18 21:11:38,760 INFO L78 Accepts]: Start accepts. Automaton has 22384 states and 25870 transitions. Word has length 200 [2022-11-18 21:11:38,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:38,760 INFO L495 AbstractCegarLoop]: Abstraction has 22384 states and 25870 transitions. [2022-11-18 21:11:38,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) 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 21:11:38,761 INFO L276 IsEmpty]: Start isEmpty. Operand 22384 states and 25870 transitions. [2022-11-18 21:11:38,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-11-18 21:11:38,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:38,781 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:11:38,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 21:11:38,782 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:11:38,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:38,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1419350507, now seen corresponding path program 1 times [2022-11-18 21:11:38,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:38,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028466918] [2022-11-18 21:11:38,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:38,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:39,323 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-18 21:11:39,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:39,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028466918] [2022-11-18 21:11:39,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028466918] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:11:39,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:11:39,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:11:39,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583141150] [2022-11-18 21:11:39,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:39,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:11:39,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:39,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:11:39,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:11:39,326 INFO L87 Difference]: Start difference. First operand 22384 states and 25870 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 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 21:11:40,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:40,587 INFO L93 Difference]: Finished difference Result 55756 states and 64725 transitions. [2022-11-18 21:11:40,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:11:40,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 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 213 [2022-11-18 21:11:40,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:40,645 INFO L225 Difference]: With dead ends: 55756 [2022-11-18 21:11:40,645 INFO L226 Difference]: Without dead ends: 33577 [2022-11-18 21:11:40,662 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 21:11:40,663 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 208 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:40,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 100 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 21:11:40,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33577 states. [2022-11-18 21:11:41,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33577 to 32956. [2022-11-18 21:11:41,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32956 states, 32955 states have (on average 1.1514489455317858) internal successors, (37946), 32955 states have internal predecessors, (37946), 0 states have call successors, (0), 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 21:11:41,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32956 states to 32956 states and 37946 transitions. [2022-11-18 21:11:41,347 INFO L78 Accepts]: Start accepts. Automaton has 32956 states and 37946 transitions. Word has length 213 [2022-11-18 21:11:41,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:41,347 INFO L495 AbstractCegarLoop]: Abstraction has 32956 states and 37946 transitions. [2022-11-18 21:11:41,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 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 21:11:41,347 INFO L276 IsEmpty]: Start isEmpty. Operand 32956 states and 37946 transitions. [2022-11-18 21:11:41,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-18 21:11:41,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:41,390 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:11:41,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-18 21:11:41,390 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:11:41,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:41,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1457404762, now seen corresponding path program 1 times [2022-11-18 21:11:41,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:41,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828042479] [2022-11-18 21:11:41,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:41,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:41,684 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-18 21:11:41,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:41,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828042479] [2022-11-18 21:11:41,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828042479] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:11:41,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:11:41,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:11:41,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351829338] [2022-11-18 21:11:41,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:41,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:11:41,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:41,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:11:41,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:11:41,688 INFO L87 Difference]: Start difference. First operand 32956 states and 37946 transitions. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 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 21:11:43,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:43,340 INFO L93 Difference]: Finished difference Result 95627 states and 110910 transitions. [2022-11-18 21:11:43,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:11:43,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 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 230 [2022-11-18 21:11:43,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:43,442 INFO L225 Difference]: With dead ends: 95627 [2022-11-18 21:11:43,443 INFO L226 Difference]: Without dead ends: 63079 [2022-11-18 21:11:43,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:11:43,472 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 477 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:43,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 472 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-18 21:11:43,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63079 states. [2022-11-18 21:11:44,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63079 to 50459. [2022-11-18 21:11:44,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50459 states, 50458 states have (on average 1.1502041301676642) internal successors, (58037), 50458 states have internal predecessors, (58037), 0 states have call successors, (0), 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 21:11:44,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50459 states to 50459 states and 58037 transitions. [2022-11-18 21:11:44,683 INFO L78 Accepts]: Start accepts. Automaton has 50459 states and 58037 transitions. Word has length 230 [2022-11-18 21:11:44,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:44,690 INFO L495 AbstractCegarLoop]: Abstraction has 50459 states and 58037 transitions. [2022-11-18 21:11:44,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 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 21:11:44,691 INFO L276 IsEmpty]: Start isEmpty. Operand 50459 states and 58037 transitions. [2022-11-18 21:11:44,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-11-18 21:11:44,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:44,753 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:11:44,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 21:11:44,754 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:11:44,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:44,754 INFO L85 PathProgramCache]: Analyzing trace with hash -2026881340, now seen corresponding path program 1 times [2022-11-18 21:11:44,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:44,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893493517] [2022-11-18 21:11:44,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:44,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:45,277 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-18 21:11:45,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:45,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893493517] [2022-11-18 21:11:45,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893493517] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:11:45,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:11:45,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:11:45,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346652476] [2022-11-18 21:11:45,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:45,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:11:45,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:45,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:11:45,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:11:45,281 INFO L87 Difference]: Start difference. First operand 50459 states and 58037 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 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 21:11:46,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:46,672 INFO L93 Difference]: Finished difference Result 134481 states and 155084 transitions. [2022-11-18 21:11:46,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:11:46,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 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 295 [2022-11-18 21:11:46,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:46,762 INFO L225 Difference]: With dead ends: 134481 [2022-11-18 21:11:46,762 INFO L226 Difference]: Without dead ends: 84227 [2022-11-18 21:11:46,790 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 21:11:46,790 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 215 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:46,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 122 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-18 21:11:46,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84227 states. [2022-11-18 21:11:47,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84227 to 84220. [2022-11-18 21:11:47,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84220 states, 84219 states have (on average 1.1496811883304243) internal successors, (96825), 84219 states have internal predecessors, (96825), 0 states have call successors, (0), 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 21:11:48,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84220 states to 84220 states and 96825 transitions. [2022-11-18 21:11:48,068 INFO L78 Accepts]: Start accepts. Automaton has 84220 states and 96825 transitions. Word has length 295 [2022-11-18 21:11:48,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:48,069 INFO L495 AbstractCegarLoop]: Abstraction has 84220 states and 96825 transitions. [2022-11-18 21:11:48,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 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 21:11:48,069 INFO L276 IsEmpty]: Start isEmpty. Operand 84220 states and 96825 transitions. [2022-11-18 21:11:48,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-11-18 21:11:48,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:48,417 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:48,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-18 21:11:48,418 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:11:48,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:48,427 INFO L85 PathProgramCache]: Analyzing trace with hash -679322528, now seen corresponding path program 1 times [2022-11-18 21:11:48,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:48,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882435399] [2022-11-18 21:11:48,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:48,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:49,664 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-18 21:11:49,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:49,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882435399] [2022-11-18 21:11:49,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882435399] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:11:49,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:11:49,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:11:49,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334103563] [2022-11-18 21:11:49,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:49,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:11:49,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:49,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:11:49,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:11:49,667 INFO L87 Difference]: Start difference. First operand 84220 states and 96825 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 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 21:11:51,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:51,183 INFO L93 Difference]: Finished difference Result 189401 states and 218167 transitions. [2022-11-18 21:11:51,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:11:51,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 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 319 [2022-11-18 21:11:51,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:51,297 INFO L225 Difference]: With dead ends: 189401 [2022-11-18 21:11:51,298 INFO L226 Difference]: Without dead ends: 105386 [2022-11-18 21:11:51,330 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 21:11:51,331 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 157 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:51,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 141 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-18 21:11:51,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105386 states. [2022-11-18 21:11:52,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105386 to 105384. [2022-11-18 21:11:53,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105384 states, 105383 states have (on average 1.1522826262300372) internal successors, (121431), 105383 states have internal predecessors, (121431), 0 states have call successors, (0), 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 21:11:53,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105384 states to 105384 states and 121431 transitions. [2022-11-18 21:11:53,409 INFO L78 Accepts]: Start accepts. Automaton has 105384 states and 121431 transitions. Word has length 319 [2022-11-18 21:11:53,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:53,410 INFO L495 AbstractCegarLoop]: Abstraction has 105384 states and 121431 transitions. [2022-11-18 21:11:53,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 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 21:11:53,410 INFO L276 IsEmpty]: Start isEmpty. Operand 105384 states and 121431 transitions. [2022-11-18 21:11:53,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-11-18 21:11:53,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:53,517 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:53,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 21:11:53,517 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:11:53,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:53,518 INFO L85 PathProgramCache]: Analyzing trace with hash 901370999, now seen corresponding path program 1 times [2022-11-18 21:11:53,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:53,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097004346] [2022-11-18 21:11:53,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:53,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:54,051 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-11-18 21:11:54,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:54,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097004346] [2022-11-18 21:11:54,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097004346] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:11:54,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:11:54,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:11:54,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564171205] [2022-11-18 21:11:54,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:54,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:11:54,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:54,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:11:54,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:11:54,054 INFO L87 Difference]: Start difference. First operand 105384 states and 121431 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 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 21:11:55,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:55,594 INFO L93 Difference]: Finished difference Result 196707 states and 226115 transitions. [2022-11-18 21:11:55,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:11:55,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 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 323 [2022-11-18 21:11:55,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:55,716 INFO L225 Difference]: With dead ends: 196707 [2022-11-18 21:11:55,716 INFO L226 Difference]: Without dead ends: 112692 [2022-11-18 21:11:55,754 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 21:11:55,755 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 163 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:55,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 357 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 21:11:55,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112692 states. [2022-11-18 21:11:57,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112692 to 111880. [2022-11-18 21:11:57,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111880 states, 111879 states have (on average 1.1415010859946908) internal successors, (127710), 111879 states have internal predecessors, (127710), 0 states have call successors, (0), 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 21:11:57,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111880 states to 111880 states and 127710 transitions. [2022-11-18 21:11:57,649 INFO L78 Accepts]: Start accepts. Automaton has 111880 states and 127710 transitions. Word has length 323 [2022-11-18 21:11:57,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:57,649 INFO L495 AbstractCegarLoop]: Abstraction has 111880 states and 127710 transitions. [2022-11-18 21:11:57,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 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 21:11:57,650 INFO L276 IsEmpty]: Start isEmpty. Operand 111880 states and 127710 transitions. [2022-11-18 21:11:57,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-11-18 21:11:57,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:57,716 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:11:57,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-18 21:11:57,717 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:11:57,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:57,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1063126104, now seen corresponding path program 1 times [2022-11-18 21:11:57,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:57,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560135488] [2022-11-18 21:11:57,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:57,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:57,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:58,878 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-11-18 21:11:58,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:58,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560135488] [2022-11-18 21:11:58,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560135488] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:11:58,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:11:58,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:11:58,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210464104] [2022-11-18 21:11:58,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:11:58,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:11:58,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:58,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:11:58,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:11:58,886 INFO L87 Difference]: Start difference. First operand 111880 states and 127710 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 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 21:12:00,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:12:00,692 INFO L93 Difference]: Finished difference Result 228832 states and 260859 transitions. [2022-11-18 21:12:00,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:12:00,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 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 330 [2022-11-18 21:12:00,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:12:00,834 INFO L225 Difference]: With dead ends: 228832 [2022-11-18 21:12:00,834 INFO L226 Difference]: Without dead ends: 138321 [2022-11-18 21:12:00,858 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 21:12:00,859 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 218 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 21:12:00,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 134 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 21:12:00,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138321 states. [2022-11-18 21:12:02,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138321 to 138316. [2022-11-18 21:12:02,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138316 states, 138315 states have (on average 1.1416043090048078) internal successors, (157901), 138315 states have internal predecessors, (157901), 0 states have call successors, (0), 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 21:12:02,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138316 states to 138316 states and 157901 transitions. [2022-11-18 21:12:02,963 INFO L78 Accepts]: Start accepts. Automaton has 138316 states and 157901 transitions. Word has length 330 [2022-11-18 21:12:02,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:12:02,963 INFO L495 AbstractCegarLoop]: Abstraction has 138316 states and 157901 transitions. [2022-11-18 21:12:02,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 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 21:12:02,963 INFO L276 IsEmpty]: Start isEmpty. Operand 138316 states and 157901 transitions. [2022-11-18 21:12:03,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2022-11-18 21:12:03,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:12:03,029 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:12:03,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-18 21:12:03,030 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:12:03,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:12:03,031 INFO L85 PathProgramCache]: Analyzing trace with hash 178796709, now seen corresponding path program 1 times [2022-11-18 21:12:03,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:12:03,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558559081] [2022-11-18 21:12:03,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:12:03,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:12:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:12:03,479 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 216 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-18 21:12:03,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:12:03,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558559081] [2022-11-18 21:12:03,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558559081] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:12:03,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:12:03,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:12:03,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332644888] [2022-11-18 21:12:03,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:12:03,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:12:03,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:12:03,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:12:03,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:12:03,483 INFO L87 Difference]: Start difference. First operand 138316 states and 157901 transitions. Second operand has 4 states, 4 states have (on average 58.5) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 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 21:12:05,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:12:05,805 INFO L93 Difference]: Finished difference Result 228942 states and 261013 transitions. [2022-11-18 21:12:05,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:12:05,805 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.5) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 338 [2022-11-18 21:12:05,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:12:05,966 INFO L225 Difference]: With dead ends: 228942 [2022-11-18 21:12:05,967 INFO L226 Difference]: Without dead ends: 138431 [2022-11-18 21:12:06,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:12:06,016 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 387 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:12:06,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 78 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-18 21:12:06,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138431 states. [2022-11-18 21:12:07,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138431 to 136895. [2022-11-18 21:12:08,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136895 states, 136894 states have (on average 1.1424678948675617) internal successors, (156397), 136894 states have internal predecessors, (156397), 0 states have call successors, (0), 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 21:12:08,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136895 states to 136895 states and 156397 transitions. [2022-11-18 21:12:08,200 INFO L78 Accepts]: Start accepts. Automaton has 136895 states and 156397 transitions. Word has length 338 [2022-11-18 21:12:08,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:12:08,200 INFO L495 AbstractCegarLoop]: Abstraction has 136895 states and 156397 transitions. [2022-11-18 21:12:08,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.5) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 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 21:12:08,201 INFO L276 IsEmpty]: Start isEmpty. Operand 136895 states and 156397 transitions. [2022-11-18 21:12:08,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-11-18 21:12:08,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:12:08,247 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:12:08,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-18 21:12:08,247 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:12:08,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:12:08,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1666657648, now seen corresponding path program 1 times [2022-11-18 21:12:08,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:12:08,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352153763] [2022-11-18 21:12:08,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:12:08,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:12:08,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:12:09,251 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 129 proven. 6 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-11-18 21:12:09,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:12:09,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352153763] [2022-11-18 21:12:09,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352153763] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:12:09,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704390519] [2022-11-18 21:12:09,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:12:09,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:12:09,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879c77a7-2eac-4914-ae9a-0c465c8a96da/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:12:09,255 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879c77a7-2eac-4914-ae9a-0c465c8a96da/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:12:09,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879c77a7-2eac-4914-ae9a-0c465c8a96da/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 21:12:09,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:12:09,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 21:12:09,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:12:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 222 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-11-18 21:12:09,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:12:09,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704390519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:12:09,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:12:09,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-18 21:12:09,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611296894] [2022-11-18 21:12:09,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:12:09,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:12:09,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:12:09,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:12:09,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:12:09,623 INFO L87 Difference]: Start difference. First operand 136895 states and 156397 transitions. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:12:11,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:12:11,843 INFO L93 Difference]: Finished difference Result 297131 states and 339473 transitions. [2022-11-18 21:12:11,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:12:11,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 345 [2022-11-18 21:12:11,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:12:12,014 INFO L225 Difference]: With dead ends: 297131 [2022-11-18 21:12:12,014 INFO L226 Difference]: Without dead ends: 160441 [2022-11-18 21:12:12,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:12:12,052 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 238 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 21:12:12,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 128 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 21:12:12,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160441 states. [2022-11-18 21:12:14,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160441 to 159827. [2022-11-18 21:12:14,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159827 states, 159826 states have (on average 1.1344336966451016) internal successors, (181312), 159826 states have internal predecessors, (181312), 0 states have call successors, (0), 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 21:12:14,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159827 states to 159827 states and 181312 transitions. [2022-11-18 21:12:14,521 INFO L78 Accepts]: Start accepts. Automaton has 159827 states and 181312 transitions. Word has length 345 [2022-11-18 21:12:14,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:12:14,521 INFO L495 AbstractCegarLoop]: Abstraction has 159827 states and 181312 transitions. [2022-11-18 21:12:14,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:12:14,522 INFO L276 IsEmpty]: Start isEmpty. Operand 159827 states and 181312 transitions. [2022-11-18 21:12:14,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2022-11-18 21:12:14,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:12:14,577 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:12:14,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879c77a7-2eac-4914-ae9a-0c465c8a96da/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 21:12:14,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_879c77a7-2eac-4914-ae9a-0c465c8a96da/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 21:12:14,779 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:12:14,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:12:14,779 INFO L85 PathProgramCache]: Analyzing trace with hash -290618115, now seen corresponding path program 1 times [2022-11-18 21:12:14,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:12:14,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886988337] [2022-11-18 21:12:14,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:12:14,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:12:14,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:12:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 210 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-18 21:12:15,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:12:15,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886988337] [2022-11-18 21:12:15,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886988337] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:12:15,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:12:15,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:12:15,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421003213] [2022-11-18 21:12:15,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:12:15,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:12:15,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:12:15,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:12:15,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:12:15,195 INFO L87 Difference]: Start difference. First operand 159827 states and 181312 transitions. Second operand has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 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 21:12:18,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:12:18,106 INFO L93 Difference]: Finished difference Result 348829 states and 396351 transitions. [2022-11-18 21:12:18,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:12:18,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 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 349 [2022-11-18 21:12:18,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:12:18,341 INFO L225 Difference]: With dead ends: 348829 [2022-11-18 21:12:18,341 INFO L226 Difference]: Without dead ends: 189207 [2022-11-18 21:12:19,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:12:19,016 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 370 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:12:19,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 92 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-18 21:12:19,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189207 states.