./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/seq-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invgen/seq-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8 --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 6c770a3141edeab927df0da4e8c2152e1fb2e87b0c43a352500a7e3d3cff4533 --- 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-2329fc7 [2022-12-13 17:44:29,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:44:29,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:44:29,352 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:44:29,352 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:44:29,353 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:44:29,354 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:44:29,355 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:44:29,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:44:29,357 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:44:29,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:44:29,358 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:44:29,358 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:44:29,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:44:29,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:44:29,361 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:44:29,361 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:44:29,362 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:44:29,363 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:44:29,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:44:29,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:44:29,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:44:29,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:44:29,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:44:29,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:44:29,370 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:44:29,370 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:44:29,371 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:44:29,372 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:44:29,372 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:44:29,372 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:44:29,373 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:44:29,374 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:44:29,375 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:44:29,375 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:44:29,376 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:44:29,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:44:29,376 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:44:29,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:44:29,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:44:29,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:44:29,378 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 17:44:29,393 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:44:29,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:44:29,393 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:44:29,393 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:44:29,394 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:44:29,394 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:44:29,395 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:44:29,395 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:44:29,395 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:44:29,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:44:29,395 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:44:29,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:44:29,396 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:44:29,396 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:44:29,396 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 17:44:29,396 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:44:29,396 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 17:44:29,396 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:44:29,397 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 17:44:29,397 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:44:29,397 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 17:44:29,397 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:44:29,397 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:44:29,397 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:44:29,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:44:29,398 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:44:29,398 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:44:29,398 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 17:44:29,398 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:44:29,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:44:29,398 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:44:29,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 17:44:29,398 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:44:29,399 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:44:29,399 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:44:29,399 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c770a3141edeab927df0da4e8c2152e1fb2e87b0c43a352500a7e3d3cff4533 [2022-12-13 17:44:29,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:44:29,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:44:29,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:44:29,577 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:44:29,577 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:44:29,578 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/loop-invgen/seq-3.i [2022-12-13 17:44:32,173 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:44:32,317 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:44:32,318 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/sv-benchmarks/c/loop-invgen/seq-3.i [2022-12-13 17:44:32,323 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/data/0b84baa78/dc1190edb3aa4c1c882f28664821ad0d/FLAG24cc78b46 [2022-12-13 17:44:32,731 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/data/0b84baa78/dc1190edb3aa4c1c882f28664821ad0d [2022-12-13 17:44:32,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:44:32,734 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:44:32,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:44:32,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:44:32,739 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:44:32,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:44:32" (1/1) ... [2022-12-13 17:44:32,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ae8973b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:32, skipping insertion in model container [2022-12-13 17:44:32,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:44:32" (1/1) ... [2022-12-13 17:44:32,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:44:32,759 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:44:32,873 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/sv-benchmarks/c/loop-invgen/seq-3.i[893,906] [2022-12-13 17:44:32,884 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:44:32,892 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:44:32,902 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/sv-benchmarks/c/loop-invgen/seq-3.i[893,906] [2022-12-13 17:44:32,906 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:44:32,918 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:44:32,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:32 WrapperNode [2022-12-13 17:44:32,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:44:32,919 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:44:32,919 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:44:32,919 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:44:32,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:32" (1/1) ... [2022-12-13 17:44:32,930 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:32" (1/1) ... [2022-12-13 17:44:32,942 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2022-12-13 17:44:32,943 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:44:32,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:44:32,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:44:32,944 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:44:32,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:32" (1/1) ... [2022-12-13 17:44:32,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:32" (1/1) ... [2022-12-13 17:44:32,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:32" (1/1) ... [2022-12-13 17:44:32,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:32" (1/1) ... [2022-12-13 17:44:32,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:32" (1/1) ... [2022-12-13 17:44:32,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:32" (1/1) ... [2022-12-13 17:44:32,957 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:32" (1/1) ... [2022-12-13 17:44:32,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:32" (1/1) ... [2022-12-13 17:44:32,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:44:32,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:44:32,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:44:32,960 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:44:32,960 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:32" (1/1) ... [2022-12-13 17:44:32,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:44:32,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:32,983 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:44:32,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:44:33,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 17:44:33,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 17:44:33,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:44:33,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:44:33,068 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:44:33,069 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:44:33,167 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:44:33,173 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:44:33,173 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 17:44:33,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:44:33 BoogieIcfgContainer [2022-12-13 17:44:33,175 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:44:33,178 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:44:33,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:44:33,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:44:33,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:44:32" (1/3) ... [2022-12-13 17:44:33,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8b3c9f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:44:33, skipping insertion in model container [2022-12-13 17:44:33,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:32" (2/3) ... [2022-12-13 17:44:33,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8b3c9f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:44:33, skipping insertion in model container [2022-12-13 17:44:33,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:44:33" (3/3) ... [2022-12-13 17:44:33,184 INFO L112 eAbstractionObserver]: Analyzing ICFG seq-3.i [2022-12-13 17:44:33,200 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:44:33,200 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 17:44:33,241 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:44:33,247 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;@4355ba8d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:44:33,247 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 17:44:33,251 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:33,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 17:44:33,256 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:33,256 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:33,257 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:33,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:33,261 INFO L85 PathProgramCache]: Analyzing trace with hash -163175075, now seen corresponding path program 1 times [2022-12-13 17:44:33,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:33,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318181386] [2022-12-13 17:44:33,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:33,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:33,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:33,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:33,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:33,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318181386] [2022-12-13 17:44:33,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318181386] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:44:33,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:44:33,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 17:44:33,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370992687] [2022-12-13 17:44:33,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:44:33,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 17:44:33,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:33,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 17:44:33,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:44:33,578 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 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 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:33,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:33,694 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2022-12-13 17:44:33,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:44:33,697 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-12-13 17:44:33,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:33,704 INFO L225 Difference]: With dead ends: 48 [2022-12-13 17:44:33,704 INFO L226 Difference]: Without dead ends: 23 [2022-12-13 17:44:33,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-13 17:44:33,710 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:33,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 60 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:44:33,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-13 17:44:33,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2022-12-13 17:44:33,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:33,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-12-13 17:44:33,737 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2022-12-13 17:44:33,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:33,738 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-12-13 17:44:33,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:33,738 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-12-13 17:44:33,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-13 17:44:33,739 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:33,739 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:33,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 17:44:33,740 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:33,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:33,740 INFO L85 PathProgramCache]: Analyzing trace with hash -712013865, now seen corresponding path program 1 times [2022-12-13 17:44:33,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:33,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441658954] [2022-12-13 17:44:33,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:33,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:33,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:33,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:33,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441658954] [2022-12-13 17:44:33,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441658954] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:33,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905753905] [2022-12-13 17:44:33,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:33,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:33,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:33,856 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:33,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 17:44:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:33,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:44:33,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:33,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:33,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:44:33,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905753905] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:44:33,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:44:33,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-12-13 17:44:33,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790955506] [2022-12-13 17:44:33,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:44:33,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:44:33,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:33,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:44:33,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:44:33,986 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:34,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:34,026 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-12-13 17:44:34,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:44:34,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2022-12-13 17:44:34,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:34,027 INFO L225 Difference]: With dead ends: 26 [2022-12-13 17:44:34,027 INFO L226 Difference]: Without dead ends: 24 [2022-12-13 17:44:34,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-13 17:44:34,028 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:34,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 34 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:44:34,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-13 17:44:34,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2022-12-13 17:44:34,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:34,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-12-13 17:44:34,032 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2022-12-13 17:44:34,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:34,032 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-12-13 17:44:34,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:34,032 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-12-13 17:44:34,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 17:44:34,033 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:34,033 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:34,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 17:44:34,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:34,235 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:34,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:34,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1243265849, now seen corresponding path program 1 times [2022-12-13 17:44:34,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:34,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570540524] [2022-12-13 17:44:34,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:34,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:34,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:34,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570540524] [2022-12-13 17:44:34,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570540524] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:34,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742960298] [2022-12-13 17:44:34,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:34,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:34,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:34,453 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:34,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 17:44:34,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:34,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:44:34,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:34,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:34,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:34,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742960298] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:34,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:34,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-12-13 17:44:34,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031336759] [2022-12-13 17:44:34,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:34,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 17:44:34,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:34,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 17:44:34,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-12-13 17:44:34,656 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:34,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:34,753 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-12-13 17:44:34,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 17:44:34,754 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 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 15 [2022-12-13 17:44:34,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:34,754 INFO L225 Difference]: With dead ends: 38 [2022-12-13 17:44:34,755 INFO L226 Difference]: Without dead ends: 28 [2022-12-13 17:44:34,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2022-12-13 17:44:34,756 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:34,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 100 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:44:34,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-13 17:44:34,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2022-12-13 17:44:34,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:34,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-12-13 17:44:34,761 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 15 [2022-12-13 17:44:34,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:34,761 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-12-13 17:44:34,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:34,761 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-12-13 17:44:34,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 17:44:34,762 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:34,762 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:34,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 17:44:34,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:34,964 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:34,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:34,966 INFO L85 PathProgramCache]: Analyzing trace with hash -2084334856, now seen corresponding path program 1 times [2022-12-13 17:44:34,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:34,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607121386] [2022-12-13 17:44:34,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:34,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:34,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:35,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:35,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607121386] [2022-12-13 17:44:35,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607121386] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:35,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13646233] [2022-12-13 17:44:35,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:35,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:35,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:35,152 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:35,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 17:44:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:35,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:44:35,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:35,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:35,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:35,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13646233] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:35,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:35,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-13 17:44:35,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700215940] [2022-12-13 17:44:35,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:35,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 17:44:35,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:35,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 17:44:35,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-12-13 17:44:35,322 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:35,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:35,438 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-12-13 17:44:35,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 17:44:35,438 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 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 15 [2022-12-13 17:44:35,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:35,439 INFO L225 Difference]: With dead ends: 50 [2022-12-13 17:44:35,439 INFO L226 Difference]: Without dead ends: 40 [2022-12-13 17:44:35,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2022-12-13 17:44:35,441 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 66 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:35,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 60 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:44:35,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-13 17:44:35,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 21. [2022-12-13 17:44:35,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:35,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-12-13 17:44:35,444 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2022-12-13 17:44:35,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:35,445 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-12-13 17:44:35,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:35,445 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-12-13 17:44:35,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-13 17:44:35,445 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:35,445 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:35,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 17:44:35,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:35,647 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:35,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:35,649 INFO L85 PathProgramCache]: Analyzing trace with hash -929410893, now seen corresponding path program 2 times [2022-12-13 17:44:35,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:35,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693156667] [2022-12-13 17:44:35,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:35,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:35,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:35,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:35,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693156667] [2022-12-13 17:44:35,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693156667] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:35,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228136499] [2022-12-13 17:44:35,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:44:35,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:35,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:35,814 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:35,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 17:44:35,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:44:35,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:44:35,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 17:44:35,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:35,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:35,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:35,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:35,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228136499] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:35,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:35,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-12-13 17:44:35,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53657434] [2022-12-13 17:44:35,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:35,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 17:44:35,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:35,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 17:44:35,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-13 17:44:35,911 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:35,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:35,963 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-12-13 17:44:35,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 17:44:35,963 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 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 16 [2022-12-13 17:44:35,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:35,964 INFO L225 Difference]: With dead ends: 32 [2022-12-13 17:44:35,964 INFO L226 Difference]: Without dead ends: 30 [2022-12-13 17:44:35,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 17:44:35,965 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:35,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 61 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:44:35,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-12-13 17:44:35,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2022-12-13 17:44:35,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:35,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-12-13 17:44:35,969 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2022-12-13 17:44:35,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:35,969 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-12-13 17:44:35,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:35,969 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-12-13 17:44:35,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-13 17:44:35,969 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:35,969 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:35,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 17:44:36,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:36,171 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:36,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:36,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1579087069, now seen corresponding path program 3 times [2022-12-13 17:44:36,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:36,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338394100] [2022-12-13 17:44:36,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:36,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:36,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:36,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:36,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:36,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338394100] [2022-12-13 17:44:36,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338394100] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:36,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4664649] [2022-12-13 17:44:36,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:44:36,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:36,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:36,381 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:36,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 17:44:36,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 17:44:36,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:44:36,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 17:44:36,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:36,555 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:36,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:36,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4664649] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:36,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:36,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-12-13 17:44:36,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929468263] [2022-12-13 17:44:36,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:36,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 17:44:36,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:36,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 17:44:36,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-12-13 17:44:36,624 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:36,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:36,741 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2022-12-13 17:44:36,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 17:44:36,741 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-13 17:44:36,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:36,742 INFO L225 Difference]: With dead ends: 51 [2022-12-13 17:44:36,742 INFO L226 Difference]: Without dead ends: 38 [2022-12-13 17:44:36,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2022-12-13 17:44:36,743 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 61 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:36,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 90 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:44:36,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-13 17:44:36,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2022-12-13 17:44:36,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:36,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-12-13 17:44:36,748 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 19 [2022-12-13 17:44:36,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:36,749 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-12-13 17:44:36,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:36,749 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-12-13 17:44:36,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-13 17:44:36,749 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:36,749 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:36,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 17:44:36,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:36,951 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:36,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:36,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1678234908, now seen corresponding path program 1 times [2022-12-13 17:44:36,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:36,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131946406] [2022-12-13 17:44:36,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:36,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:36,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:37,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:37,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131946406] [2022-12-13 17:44:37,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131946406] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:37,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616738093] [2022-12-13 17:44:37,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:37,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:37,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:37,147 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:37,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 17:44:37,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:37,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 17:44:37,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:37,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:37,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:37,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616738093] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:37,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:37,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-12-13 17:44:37,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18361665] [2022-12-13 17:44:37,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:37,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 17:44:37,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:37,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 17:44:37,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-12-13 17:44:37,367 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:37,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:37,509 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2022-12-13 17:44:37,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 17:44:37,509 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-13 17:44:37,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:37,510 INFO L225 Difference]: With dead ends: 64 [2022-12-13 17:44:37,510 INFO L226 Difference]: Without dead ends: 51 [2022-12-13 17:44:37,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2022-12-13 17:44:37,511 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 75 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:37,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 102 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:44:37,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-13 17:44:37,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 25. [2022-12-13 17:44:37,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:37,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-12-13 17:44:37,517 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 19 [2022-12-13 17:44:37,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:37,517 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-12-13 17:44:37,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:37,517 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-12-13 17:44:37,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-13 17:44:37,517 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:37,517 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:37,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 17:44:37,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:37,719 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:37,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:37,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1265791229, now seen corresponding path program 2 times [2022-12-13 17:44:37,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:37,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907645624] [2022-12-13 17:44:37,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:37,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:37,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:37,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907645624] [2022-12-13 17:44:37,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907645624] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:37,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485690564] [2022-12-13 17:44:37,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:44:37,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:37,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:37,911 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:37,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 17:44:37,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:44:37,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:44:37,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 17:44:37,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:38,045 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:38,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:38,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:38,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485690564] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:38,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:38,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-12-13 17:44:38,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596623344] [2022-12-13 17:44:38,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:38,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 17:44:38,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:38,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 17:44:38,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-12-13 17:44:38,110 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:38,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:38,258 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2022-12-13 17:44:38,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 17:44:38,259 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-13 17:44:38,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:38,259 INFO L225 Difference]: With dead ends: 79 [2022-12-13 17:44:38,259 INFO L226 Difference]: Without dead ends: 66 [2022-12-13 17:44:38,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=627, Unknown=0, NotChecked=0, Total=812 [2022-12-13 17:44:38,260 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 84 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:38,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 106 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:44:38,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-12-13 17:44:38,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 27. [2022-12-13 17:44:38,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:38,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-12-13 17:44:38,266 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 19 [2022-12-13 17:44:38,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:38,267 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-12-13 17:44:38,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:38,267 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-12-13 17:44:38,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-13 17:44:38,267 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:38,267 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:38,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 17:44:38,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 17:44:38,469 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:38,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:38,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1081918121, now seen corresponding path program 4 times [2022-12-13 17:44:38,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:38,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158511949] [2022-12-13 17:44:38,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:38,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:38,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:38,625 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:38,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:38,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158511949] [2022-12-13 17:44:38,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158511949] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:38,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819360499] [2022-12-13 17:44:38,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:44:38,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:38,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:38,627 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:38,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 17:44:38,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:44:38,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:44:38,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 17:44:38,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:38,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:38,724 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:38,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819360499] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:38,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:38,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-12-13 17:44:38,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411418424] [2022-12-13 17:44:38,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:38,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 17:44:38,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:38,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 17:44:38,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-12-13 17:44:38,726 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:38,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:38,778 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-12-13 17:44:38,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 17:44:38,778 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 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 20 [2022-12-13 17:44:38,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:38,778 INFO L225 Difference]: With dead ends: 38 [2022-12-13 17:44:38,778 INFO L226 Difference]: Without dead ends: 36 [2022-12-13 17:44:38,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-12-13 17:44:38,779 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:38,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 58 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:44:38,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-13 17:44:38,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2022-12-13 17:44:38,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:38,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-12-13 17:44:38,786 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 20 [2022-12-13 17:44:38,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:38,786 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-12-13 17:44:38,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:38,786 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-12-13 17:44:38,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-13 17:44:38,787 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:38,787 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:38,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 17:44:38,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:38,988 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:38,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:38,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1983310407, now seen corresponding path program 5 times [2022-12-13 17:44:38,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:38,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685850525] [2022-12-13 17:44:38,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:38,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:38,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:39,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:39,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685850525] [2022-12-13 17:44:39,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685850525] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:39,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128025809] [2022-12-13 17:44:39,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:44:39,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:39,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:39,119 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:39,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 17:44:39,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 17:44:39,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:44:39,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 17:44:39,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:39,288 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:39,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:39,370 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:39,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128025809] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:39,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:39,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-12-13 17:44:39,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820450852] [2022-12-13 17:44:39,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:39,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 17:44:39,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:39,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 17:44:39,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-12-13 17:44:39,372 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:39,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:39,524 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2022-12-13 17:44:39,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 17:44:39,524 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 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 23 [2022-12-13 17:44:39,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:39,525 INFO L225 Difference]: With dead ends: 64 [2022-12-13 17:44:39,525 INFO L226 Difference]: Without dead ends: 48 [2022-12-13 17:44:39,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=930, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 17:44:39,526 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:39,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 121 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:44:39,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-13 17:44:39,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2022-12-13 17:44:39,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:39,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-12-13 17:44:39,533 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2022-12-13 17:44:39,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:39,533 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-12-13 17:44:39,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:39,533 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-12-13 17:44:39,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-13 17:44:39,534 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:39,534 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:39,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 17:44:39,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 17:44:39,736 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:39,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:39,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1279672712, now seen corresponding path program 2 times [2022-12-13 17:44:39,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:39,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216893347] [2022-12-13 17:44:39,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:39,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:39,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:39,859 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:39,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:39,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216893347] [2022-12-13 17:44:39,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216893347] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:39,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565618077] [2022-12-13 17:44:39,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:44:39,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:39,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:39,861 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:39,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 17:44:39,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:44:39,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:44:39,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 17:44:39,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:40,002 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:40,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:40,072 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:40,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565618077] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:40,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:40,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2022-12-13 17:44:40,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671248382] [2022-12-13 17:44:40,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:40,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 17:44:40,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:40,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 17:44:40,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-12-13 17:44:40,073 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:40,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:40,255 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2022-12-13 17:44:40,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 17:44:40,255 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 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 23 [2022-12-13 17:44:40,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:40,256 INFO L225 Difference]: With dead ends: 81 [2022-12-13 17:44:40,256 INFO L226 Difference]: Without dead ends: 65 [2022-12-13 17:44:40,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=1058, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 17:44:40,256 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 65 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:40,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 133 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:44:40,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-12-13 17:44:40,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 31. [2022-12-13 17:44:40,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:40,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-12-13 17:44:40,261 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2022-12-13 17:44:40,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:40,261 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-12-13 17:44:40,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:40,261 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-12-13 17:44:40,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-13 17:44:40,262 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:40,262 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:40,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 17:44:40,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 17:44:40,463 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:40,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:40,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1791066585, now seen corresponding path program 3 times [2022-12-13 17:44:40,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:40,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105524419] [2022-12-13 17:44:40,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:40,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:40,573 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:40,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:40,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105524419] [2022-12-13 17:44:40,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105524419] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:40,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287861529] [2022-12-13 17:44:40,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:44:40,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:40,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:40,575 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:40,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 17:44:40,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 17:44:40,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:44:40,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 17:44:40,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:40,713 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:40,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:40,771 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:40,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287861529] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:40,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:40,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2022-12-13 17:44:40,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530758749] [2022-12-13 17:44:40,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:40,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 17:44:40,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:40,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 17:44:40,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-12-13 17:44:40,772 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:40,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:40,922 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2022-12-13 17:44:40,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 17:44:40,923 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 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 23 [2022-12-13 17:44:40,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:40,923 INFO L225 Difference]: With dead ends: 97 [2022-12-13 17:44:40,923 INFO L226 Difference]: Without dead ends: 81 [2022-12-13 17:44:40,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=1059, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 17:44:40,924 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 108 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:40,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 152 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:44:40,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-12-13 17:44:40,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 31. [2022-12-13 17:44:40,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:40,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-12-13 17:44:40,929 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2022-12-13 17:44:40,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:40,929 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-12-13 17:44:40,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:40,929 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-12-13 17:44:40,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-13 17:44:40,929 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:40,929 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:40,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 17:44:41,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:41,131 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:41,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:41,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1712107944, now seen corresponding path program 3 times [2022-12-13 17:44:41,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:41,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691792216] [2022-12-13 17:44:41,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:41,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:41,239 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:41,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:41,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691792216] [2022-12-13 17:44:41,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691792216] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:41,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356335012] [2022-12-13 17:44:41,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:44:41,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:41,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:41,241 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:41,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 17:44:41,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 17:44:41,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:44:41,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 17:44:41,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:41,377 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:41,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:41,450 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:41,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356335012] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:41,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:41,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2022-12-13 17:44:41,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84348212] [2022-12-13 17:44:41,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:41,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 17:44:41,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:41,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 17:44:41,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-12-13 17:44:41,452 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:41,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:41,642 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2022-12-13 17:44:41,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 17:44:41,642 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 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 23 [2022-12-13 17:44:41,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:41,643 INFO L225 Difference]: With dead ends: 115 [2022-12-13 17:44:41,643 INFO L226 Difference]: Without dead ends: 99 [2022-12-13 17:44:41,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=257, Invalid=933, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 17:44:41,645 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 131 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:41,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 119 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:44:41,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-12-13 17:44:41,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 33. [2022-12-13 17:44:41,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:41,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-12-13 17:44:41,653 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 23 [2022-12-13 17:44:41,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:41,653 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-12-13 17:44:41,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:41,654 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-12-13 17:44:41,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 17:44:41,654 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:41,654 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:41,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 17:44:41,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 17:44:41,855 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:41,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:41,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1769959117, now seen corresponding path program 6 times [2022-12-13 17:44:41,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:41,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517499348] [2022-12-13 17:44:41,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:41,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:41,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:41,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517499348] [2022-12-13 17:44:41,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517499348] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:41,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582173298] [2022-12-13 17:44:41,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:44:41,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:41,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:41,931 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:41,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 17:44:41,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 17:44:41,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:44:41,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 17:44:41,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:41,998 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:41,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:42,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582173298] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:42,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:42,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2022-12-13 17:44:42,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573717320] [2022-12-13 17:44:42,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:42,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 17:44:42,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:42,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 17:44:42,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-12-13 17:44:42,041 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:42,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:42,096 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-12-13 17:44:42,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 17:44:42,097 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 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 24 [2022-12-13 17:44:42,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:42,097 INFO L225 Difference]: With dead ends: 44 [2022-12-13 17:44:42,097 INFO L226 Difference]: Without dead ends: 42 [2022-12-13 17:44:42,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 8 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2022-12-13 17:44:42,098 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 24 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:42,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 84 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:44:42,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-12-13 17:44:42,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2022-12-13 17:44:42,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:42,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-12-13 17:44:42,104 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 24 [2022-12-13 17:44:42,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:42,104 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-12-13 17:44:42,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:42,105 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-12-13 17:44:42,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 17:44:42,105 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:42,105 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:42,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 17:44:42,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:42,305 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:42,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:42,306 INFO L85 PathProgramCache]: Analyzing trace with hash 466281565, now seen corresponding path program 7 times [2022-12-13 17:44:42,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:42,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199006269] [2022-12-13 17:44:42,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:42,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:42,424 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:42,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:42,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199006269] [2022-12-13 17:44:42,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199006269] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:42,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086444190] [2022-12-13 17:44:42,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:44:42,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:42,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:42,425 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:42,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 17:44:42,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:42,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 17:44:42,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:42,661 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:42,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:42,772 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:42,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086444190] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:42,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:42,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2022-12-13 17:44:42,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890485661] [2022-12-13 17:44:42,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:42,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 17:44:42,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:42,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 17:44:42,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2022-12-13 17:44:42,775 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:42,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:42,982 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2022-12-13 17:44:42,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 17:44:42,982 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 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 27 [2022-12-13 17:44:42,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:42,983 INFO L225 Difference]: With dead ends: 77 [2022-12-13 17:44:42,983 INFO L226 Difference]: Without dead ends: 58 [2022-12-13 17:44:42,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=345, Invalid=1295, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 17:44:42,984 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 57 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:42,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 147 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:44:42,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-13 17:44:42,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 37. [2022-12-13 17:44:42,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:42,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-12-13 17:44:42,995 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2022-12-13 17:44:42,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:42,995 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-12-13 17:44:42,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:42,995 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-12-13 17:44:42,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 17:44:42,996 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:42,996 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:43,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 17:44:43,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 17:44:43,197 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:43,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:43,199 INFO L85 PathProgramCache]: Analyzing trace with hash 397088156, now seen corresponding path program 4 times [2022-12-13 17:44:43,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:43,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806938998] [2022-12-13 17:44:43,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:43,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:43,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:43,344 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:43,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:43,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806938998] [2022-12-13 17:44:43,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806938998] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:43,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569643769] [2022-12-13 17:44:43,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:44:43,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:43,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:43,346 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:43,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 17:44:43,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:44:43,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:44:43,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 17:44:43,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:43,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:43,625 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:43,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569643769] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:43,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:43,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 28 [2022-12-13 17:44:43,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827124944] [2022-12-13 17:44:43,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:43,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 17:44:43,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:43,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 17:44:43,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2022-12-13 17:44:43,626 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:43,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:43,824 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2022-12-13 17:44:43,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 17:44:43,825 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 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 27 [2022-12-13 17:44:43,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:43,825 INFO L225 Difference]: With dead ends: 98 [2022-12-13 17:44:43,825 INFO L226 Difference]: Without dead ends: 79 [2022-12-13 17:44:43,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 30 SyntacticMatches, 11 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=374, Invalid=1518, Unknown=0, NotChecked=0, Total=1892 [2022-12-13 17:44:43,826 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 95 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:43,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 104 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:44:43,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-12-13 17:44:43,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 37. [2022-12-13 17:44:43,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:43,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-12-13 17:44:43,832 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2022-12-13 17:44:43,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:43,832 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-12-13 17:44:43,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:43,832 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-12-13 17:44:43,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 17:44:43,832 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:43,832 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:43,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 17:44:44,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 17:44:44,034 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:44,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:44,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1267711875, now seen corresponding path program 5 times [2022-12-13 17:44:44,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:44,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652900651] [2022-12-13 17:44:44,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:44,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:44,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:44,141 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:44,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:44,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652900651] [2022-12-13 17:44:44,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652900651] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:44,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696585421] [2022-12-13 17:44:44,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:44:44,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:44,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:44,143 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:44,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 17:44:44,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-12-13 17:44:44,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:44:44,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 17:44:44,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:44,326 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:44,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:44,400 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:44,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696585421] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:44,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:44,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2022-12-13 17:44:44,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209717664] [2022-12-13 17:44:44,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:44,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 17:44:44,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:44,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 17:44:44,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2022-12-13 17:44:44,402 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:44,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:44,587 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2022-12-13 17:44:44,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 17:44:44,588 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 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 27 [2022-12-13 17:44:44,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:44,589 INFO L225 Difference]: With dead ends: 118 [2022-12-13 17:44:44,589 INFO L226 Difference]: Without dead ends: 99 [2022-12-13 17:44:44,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 31 SyntacticMatches, 11 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=386, Invalid=1594, Unknown=0, NotChecked=0, Total=1980 [2022-12-13 17:44:44,590 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 87 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:44,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 171 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:44:44,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-12-13 17:44:44,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 37. [2022-12-13 17:44:44,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:44,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-12-13 17:44:44,597 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2022-12-13 17:44:44,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:44,598 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-12-13 17:44:44,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:44,598 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-12-13 17:44:44,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 17:44:44,598 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:44,598 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:44,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 17:44:44,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 17:44:44,799 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:44,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:44,800 INFO L85 PathProgramCache]: Analyzing trace with hash 618247548, now seen corresponding path program 6 times [2022-12-13 17:44:44,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:44,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517769972] [2022-12-13 17:44:44,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:44,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:44,906 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:44,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:44,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517769972] [2022-12-13 17:44:44,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517769972] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:44,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847937496] [2022-12-13 17:44:44,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:44:44,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:44,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:44,907 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:44,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 17:44:44,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-13 17:44:44,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:44:44,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 17:44:44,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:45,071 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:45,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:45,147 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:45,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847937496] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:45,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:45,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 26 [2022-12-13 17:44:45,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364851136] [2022-12-13 17:44:45,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:45,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 17:44:45,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:45,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 17:44:45,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-12-13 17:44:45,149 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:45,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:45,363 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2022-12-13 17:44:45,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 17:44:45,363 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 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 27 [2022-12-13 17:44:45,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:45,364 INFO L225 Difference]: With dead ends: 137 [2022-12-13 17:44:45,364 INFO L226 Difference]: Without dead ends: 118 [2022-12-13 17:44:45,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 32 SyntacticMatches, 11 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=372, Invalid=1520, Unknown=0, NotChecked=0, Total=1892 [2022-12-13 17:44:45,365 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 153 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:45,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 133 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:44:45,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-12-13 17:44:45,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 37. [2022-12-13 17:44:45,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:45,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-12-13 17:44:45,373 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2022-12-13 17:44:45,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:45,373 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-12-13 17:44:45,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:45,373 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-12-13 17:44:45,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 17:44:45,373 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:45,373 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:45,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 17:44:45,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 17:44:45,575 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:45,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:45,576 INFO L85 PathProgramCache]: Analyzing trace with hash 956179613, now seen corresponding path program 4 times [2022-12-13 17:44:45,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:45,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152903114] [2022-12-13 17:44:45,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:45,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:45,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:45,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152903114] [2022-12-13 17:44:45,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152903114] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:45,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281561088] [2022-12-13 17:44:45,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:44:45,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:45,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:45,692 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:45,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 17:44:45,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:44:45,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:44:45,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 17:44:45,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:45,871 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:45,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:45,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281561088] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:45,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:45,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 25 [2022-12-13 17:44:45,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302668708] [2022-12-13 17:44:45,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:45,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 17:44:45,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:45,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 17:44:45,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-12-13 17:44:45,966 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:46,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:46,200 INFO L93 Difference]: Finished difference Result 158 states and 171 transitions. [2022-12-13 17:44:46,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 17:44:46,200 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 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 27 [2022-12-13 17:44:46,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:46,201 INFO L225 Difference]: With dead ends: 158 [2022-12-13 17:44:46,201 INFO L226 Difference]: Without dead ends: 139 [2022-12-13 17:44:46,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 33 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=341, Invalid=1299, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 17:44:46,202 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 135 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:46,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 150 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:44:46,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-12-13 17:44:46,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 39. [2022-12-13 17:44:46,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 38 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:46,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-12-13 17:44:46,214 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 27 [2022-12-13 17:44:46,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:46,214 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-12-13 17:44:46,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:46,214 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-12-13 17:44:46,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 17:44:46,214 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:46,214 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:46,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-13 17:44:46,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:46,416 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:46,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:46,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1056697641, now seen corresponding path program 8 times [2022-12-13 17:44:46,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:46,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193060186] [2022-12-13 17:44:46,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:46,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:46,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:46,492 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:46,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:46,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193060186] [2022-12-13 17:44:46,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193060186] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:46,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077645380] [2022-12-13 17:44:46,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:44:46,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:46,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:46,494 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:46,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 17:44:46,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:44:46,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:44:46,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 17:44:46,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:46,565 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:46,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:46,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077645380] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:46,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:46,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-12-13 17:44:46,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572681217] [2022-12-13 17:44:46,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:46,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 17:44:46,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:46,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 17:44:46,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-12-13 17:44:46,616 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:46,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:46,689 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-12-13 17:44:46,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 17:44:46,690 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 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 28 [2022-12-13 17:44:46,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:46,690 INFO L225 Difference]: With dead ends: 50 [2022-12-13 17:44:46,690 INFO L226 Difference]: Without dead ends: 48 [2022-12-13 17:44:46,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 10 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2022-12-13 17:44:46,691 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:46,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 80 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:44:46,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-13 17:44:46,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2022-12-13 17:44:46,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:46,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2022-12-13 17:44:46,699 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 28 [2022-12-13 17:44:46,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:46,699 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2022-12-13 17:44:46,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:46,699 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2022-12-13 17:44:46,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-13 17:44:46,699 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:46,699 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:46,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 17:44:46,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:46,901 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:46,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:46,902 INFO L85 PathProgramCache]: Analyzing trace with hash 2035699769, now seen corresponding path program 9 times [2022-12-13 17:44:46,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:46,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144569989] [2022-12-13 17:44:46,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:46,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:46,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:47,022 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:47,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:47,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144569989] [2022-12-13 17:44:47,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144569989] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:47,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372641138] [2022-12-13 17:44:47,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:44:47,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:47,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:47,023 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:47,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 17:44:47,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 17:44:47,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:44:47,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 17:44:47,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:47,247 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:47,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:47,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372641138] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:47,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:47,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-12-13 17:44:47,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990505815] [2022-12-13 17:44:47,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:47,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 17:44:47,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:47,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 17:44:47,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 17:44:47,361 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:47,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:47,557 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2022-12-13 17:44:47,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 17:44:47,557 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 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 31 [2022-12-13 17:44:47,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:47,558 INFO L225 Difference]: With dead ends: 90 [2022-12-13 17:44:47,558 INFO L226 Difference]: Without dead ends: 68 [2022-12-13 17:44:47,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 33 SyntacticMatches, 13 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=442, Invalid=1720, Unknown=0, NotChecked=0, Total=2162 [2022-12-13 17:44:47,559 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:47,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 157 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:44:47,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-12-13 17:44:47,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 43. [2022-12-13 17:44:47,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:47,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-12-13 17:44:47,570 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2022-12-13 17:44:47,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:47,571 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-12-13 17:44:47,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:47,571 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-12-13 17:44:47,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-13 17:44:47,571 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:47,571 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:47,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 17:44:47,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:47,773 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:47,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:47,774 INFO L85 PathProgramCache]: Analyzing trace with hash 992856568, now seen corresponding path program 7 times [2022-12-13 17:44:47,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:47,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886232693] [2022-12-13 17:44:47,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:47,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:47,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:47,919 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:47,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:47,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886232693] [2022-12-13 17:44:47,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886232693] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:47,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836873510] [2022-12-13 17:44:47,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:44:47,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:47,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:47,921 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:47,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 17:44:47,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:47,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 17:44:47,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:48,147 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:48,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:48,265 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:48,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836873510] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:48,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:48,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2022-12-13 17:44:48,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087803529] [2022-12-13 17:44:48,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:48,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 17:44:48,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:48,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 17:44:48,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2022-12-13 17:44:48,267 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:48,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:48,538 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2022-12-13 17:44:48,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 17:44:48,538 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 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 31 [2022-12-13 17:44:48,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:48,539 INFO L225 Difference]: With dead ends: 115 [2022-12-13 17:44:48,539 INFO L226 Difference]: Without dead ends: 93 [2022-12-13 17:44:48,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 13 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=490, Invalid=2060, Unknown=0, NotChecked=0, Total=2550 [2022-12-13 17:44:48,541 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 76 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:48,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 225 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:44:48,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-12-13 17:44:48,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 43. [2022-12-13 17:44:48,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:48,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-12-13 17:44:48,560 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2022-12-13 17:44:48,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:48,561 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-12-13 17:44:48,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:48,561 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-12-13 17:44:48,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-13 17:44:48,561 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:48,561 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:48,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 17:44:48,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:48,763 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:48,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:48,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1236311129, now seen corresponding path program 8 times [2022-12-13 17:44:48,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:48,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935152032] [2022-12-13 17:44:48,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:48,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:48,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:48,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:48,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935152032] [2022-12-13 17:44:48,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935152032] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:48,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054438633] [2022-12-13 17:44:48,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:44:48,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:48,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:48,929 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:48,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 17:44:48,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:44:48,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:44:48,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 17:44:48,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:49,179 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:49,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:49,292 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:49,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054438633] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:49,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:49,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 31 [2022-12-13 17:44:49,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103541460] [2022-12-13 17:44:49,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:49,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 17:44:49,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:49,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 17:44:49,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2022-12-13 17:44:49,294 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:49,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:49,605 INFO L93 Difference]: Finished difference Result 139 states and 150 transitions. [2022-12-13 17:44:49,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 17:44:49,605 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 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 31 [2022-12-13 17:44:49,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:49,606 INFO L225 Difference]: With dead ends: 139 [2022-12-13 17:44:49,606 INFO L226 Difference]: Without dead ends: 117 [2022-12-13 17:44:49,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 35 SyntacticMatches, 13 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=520, Invalid=2236, Unknown=0, NotChecked=0, Total=2756 [2022-12-13 17:44:49,608 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 124 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:49,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 173 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:44:49,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-12-13 17:44:49,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 43. [2022-12-13 17:44:49,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:49,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-12-13 17:44:49,619 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2022-12-13 17:44:49,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:49,619 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-12-13 17:44:49,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:49,619 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-12-13 17:44:49,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-13 17:44:49,619 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:49,619 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:49,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 17:44:49,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 17:44:49,821 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:49,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:49,822 INFO L85 PathProgramCache]: Analyzing trace with hash -834045480, now seen corresponding path program 9 times [2022-12-13 17:44:49,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:49,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635951393] [2022-12-13 17:44:49,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:49,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:49,960 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:49,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:49,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635951393] [2022-12-13 17:44:49,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635951393] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:49,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527826684] [2022-12-13 17:44:49,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:44:49,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:49,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:49,961 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:49,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 17:44:50,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 17:44:50,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:44:50,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 17:44:50,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:50,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:50,304 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:50,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527826684] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:50,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:50,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 30 [2022-12-13 17:44:50,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713578680] [2022-12-13 17:44:50,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:50,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 17:44:50,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:50,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 17:44:50,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2022-12-13 17:44:50,305 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:50,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:50,597 INFO L93 Difference]: Finished difference Result 162 states and 174 transitions. [2022-12-13 17:44:50,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 17:44:50,597 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 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 31 [2022-12-13 17:44:50,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:50,598 INFO L225 Difference]: With dead ends: 162 [2022-12-13 17:44:50,598 INFO L226 Difference]: Without dead ends: 140 [2022-12-13 17:44:50,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 36 SyntacticMatches, 13 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=519, Invalid=2237, Unknown=0, NotChecked=0, Total=2756 [2022-12-13 17:44:50,599 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 140 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:50,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 171 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:44:50,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-12-13 17:44:50,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 43. [2022-12-13 17:44:50,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:50,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-12-13 17:44:50,610 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2022-12-13 17:44:50,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:50,610 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-12-13 17:44:50,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:50,611 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-12-13 17:44:50,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-13 17:44:50,611 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:50,611 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:50,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 17:44:50,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:50,812 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:50,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:50,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1315926137, now seen corresponding path program 10 times [2022-12-13 17:44:50,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:50,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472280258] [2022-12-13 17:44:50,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:50,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:50,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:50,964 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:50,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:50,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472280258] [2022-12-13 17:44:50,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472280258] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:50,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563639038] [2022-12-13 17:44:50,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:44:50,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:50,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:50,965 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:50,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 17:44:50,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:44:50,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:44:50,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 17:44:50,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:51,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:51,239 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:51,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563639038] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:51,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:51,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-12-13 17:44:51,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698930568] [2022-12-13 17:44:51,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:51,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 17:44:51,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:51,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 17:44:51,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2022-12-13 17:44:51,241 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:51,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:51,571 INFO L93 Difference]: Finished difference Result 184 states and 197 transitions. [2022-12-13 17:44:51,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 17:44:51,571 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 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 31 [2022-12-13 17:44:51,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:51,572 INFO L225 Difference]: With dead ends: 184 [2022-12-13 17:44:51,572 INFO L226 Difference]: Without dead ends: 162 [2022-12-13 17:44:51,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 37 SyntacticMatches, 13 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=487, Invalid=2063, Unknown=0, NotChecked=0, Total=2550 [2022-12-13 17:44:51,574 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 150 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:51,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 165 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:44:51,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-12-13 17:44:51,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 43. [2022-12-13 17:44:51,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:51,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-12-13 17:44:51,595 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2022-12-13 17:44:51,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:51,595 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-12-13 17:44:51,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:51,595 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-12-13 17:44:51,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-13 17:44:51,595 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:51,595 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:51,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-13 17:44:51,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 17:44:51,797 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:51,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:51,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1246732728, now seen corresponding path program 5 times [2022-12-13 17:44:51,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:51,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503625671] [2022-12-13 17:44:51,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:51,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:51,934 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:51,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:51,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503625671] [2022-12-13 17:44:51,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503625671] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:51,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948362866] [2022-12-13 17:44:51,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:44:51,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:51,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:51,936 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:51,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 17:44:51,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-13 17:44:51,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:44:51,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 17:44:51,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:52,121 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:52,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:52,215 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:52,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948362866] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:52,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:52,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 28 [2022-12-13 17:44:52,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657295510] [2022-12-13 17:44:52,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:52,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 17:44:52,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:52,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 17:44:52,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2022-12-13 17:44:52,220 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:52,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:52,519 INFO L93 Difference]: Finished difference Result 208 states and 223 transitions. [2022-12-13 17:44:52,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 17:44:52,519 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 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 31 [2022-12-13 17:44:52,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:52,520 INFO L225 Difference]: With dead ends: 208 [2022-12-13 17:44:52,520 INFO L226 Difference]: Without dead ends: 186 [2022-12-13 17:44:52,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 38 SyntacticMatches, 13 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=1725, Unknown=0, NotChecked=0, Total=2162 [2022-12-13 17:44:52,521 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 229 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:52,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 129 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:44:52,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-12-13 17:44:52,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 45. [2022-12-13 17:44:52,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:52,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-12-13 17:44:52,535 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 31 [2022-12-13 17:44:52,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:52,535 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-12-13 17:44:52,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:52,535 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-12-13 17:44:52,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-13 17:44:52,535 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:52,535 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:52,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-13 17:44:52,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 17:44:52,736 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:52,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:52,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1761587635, now seen corresponding path program 10 times [2022-12-13 17:44:52,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:52,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465145517] [2022-12-13 17:44:52,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:52,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:52,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:52,839 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:52,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:52,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465145517] [2022-12-13 17:44:52,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465145517] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:52,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788126338] [2022-12-13 17:44:52,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:44:52,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:52,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:52,840 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:52,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 17:44:52,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:44:52,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:44:52,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 17:44:52,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:52,899 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:52,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:52,942 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:52,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788126338] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:52,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:52,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2022-12-13 17:44:52,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334514244] [2022-12-13 17:44:52,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:52,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 17:44:52,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:52,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 17:44:52,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-12-13 17:44:52,944 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:53,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:53,030 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2022-12-13 17:44:53,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 17:44:53,031 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 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 32 [2022-12-13 17:44:53,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:53,031 INFO L225 Difference]: With dead ends: 56 [2022-12-13 17:44:53,031 INFO L226 Difference]: Without dead ends: 54 [2022-12-13 17:44:53,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 12 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2022-12-13 17:44:53,031 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 46 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:53,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 100 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:44:53,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-12-13 17:44:53,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2022-12-13 17:44:53,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:53,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-12-13 17:44:53,046 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 32 [2022-12-13 17:44:53,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:53,046 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-12-13 17:44:53,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:53,046 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-12-13 17:44:53,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 17:44:53,047 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:53,047 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:53,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-13 17:44:53,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 17:44:53,248 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:53,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:53,249 INFO L85 PathProgramCache]: Analyzing trace with hash -743312419, now seen corresponding path program 11 times [2022-12-13 17:44:53,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:53,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879142520] [2022-12-13 17:44:53,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:53,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:53,402 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:53,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:53,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879142520] [2022-12-13 17:44:53,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879142520] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:53,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538026503] [2022-12-13 17:44:53,403 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:44:53,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:53,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:53,404 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:53,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 17:44:53,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-12-13 17:44:53,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:44:53,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 17:44:53,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:53,676 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:53,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:53,799 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:53,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538026503] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:53,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:53,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2022-12-13 17:44:53,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895011170] [2022-12-13 17:44:53,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:53,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 17:44:53,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:53,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 17:44:53,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 17:44:53,800 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:54,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:54,044 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2022-12-13 17:44:54,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 17:44:54,045 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 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 35 [2022-12-13 17:44:54,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:54,045 INFO L225 Difference]: With dead ends: 103 [2022-12-13 17:44:54,045 INFO L226 Difference]: Without dead ends: 78 [2022-12-13 17:44:54,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 15 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=551, Invalid=2205, Unknown=0, NotChecked=0, Total=2756 [2022-12-13 17:44:54,046 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 69 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:54,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 142 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:44:54,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-12-13 17:44:54,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2022-12-13 17:44:54,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:54,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-12-13 17:44:54,063 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2022-12-13 17:44:54,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:54,063 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-12-13 17:44:54,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:54,063 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-12-13 17:44:54,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 17:44:54,063 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:54,063 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:54,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-13 17:44:54,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:54,264 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:54,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:54,266 INFO L85 PathProgramCache]: Analyzing trace with hash -2052557284, now seen corresponding path program 11 times [2022-12-13 17:44:54,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:54,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51418595] [2022-12-13 17:44:54,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:54,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:54,454 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 41 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:54,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:54,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51418595] [2022-12-13 17:44:54,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51418595] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:54,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392854291] [2022-12-13 17:44:54,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:44:54,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:54,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:54,456 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:54,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 17:44:54,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-12-13 17:44:54,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:44:54,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 17:44:54,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:54,686 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:54,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:54,840 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:54,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392854291] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:54,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:54,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 36 [2022-12-13 17:44:54,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606434003] [2022-12-13 17:44:54,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:54,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 17:44:54,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:54,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 17:44:54,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1023, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 17:44:54,842 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:55,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:55,216 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2022-12-13 17:44:55,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 17:44:55,216 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 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 35 [2022-12-13 17:44:55,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:55,217 INFO L225 Difference]: With dead ends: 132 [2022-12-13 17:44:55,217 INFO L226 Difference]: Without dead ends: 107 [2022-12-13 17:44:55,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 38 SyntacticMatches, 15 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=622, Invalid=2684, Unknown=0, NotChecked=0, Total=3306 [2022-12-13 17:44:55,218 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 103 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:55,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 182 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:44:55,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-12-13 17:44:55,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 49. [2022-12-13 17:44:55,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:55,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-12-13 17:44:55,236 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2022-12-13 17:44:55,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:55,236 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-12-13 17:44:55,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:55,236 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-12-13 17:44:55,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 17:44:55,236 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:55,236 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:55,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-13 17:44:55,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 17:44:55,437 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:55,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:55,438 INFO L85 PathProgramCache]: Analyzing trace with hash 399060989, now seen corresponding path program 12 times [2022-12-13 17:44:55,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:55,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265451060] [2022-12-13 17:44:55,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:55,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:55,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:55,569 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:55,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:55,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265451060] [2022-12-13 17:44:55,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265451060] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:55,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447932782] [2022-12-13 17:44:55,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:44:55,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:55,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:55,570 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:55,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 17:44:55,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-12-13 17:44:55,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:44:55,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 17:44:55,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:55,837 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:55,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:55,992 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:55,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447932782] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:55,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:55,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 35 [2022-12-13 17:44:55,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882193365] [2022-12-13 17:44:55,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:55,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 17:44:55,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:55,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 17:44:55,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 17:44:55,994 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:56,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:56,485 INFO L93 Difference]: Finished difference Result 160 states and 172 transitions. [2022-12-13 17:44:56,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 17:44:56,485 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 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 35 [2022-12-13 17:44:56,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:56,486 INFO L225 Difference]: With dead ends: 160 [2022-12-13 17:44:56,486 INFO L226 Difference]: Without dead ends: 135 [2022-12-13 17:44:56,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 39 SyntacticMatches, 15 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=675, Invalid=2985, Unknown=0, NotChecked=0, Total=3660 [2022-12-13 17:44:56,488 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 100 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:56,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 167 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:44:56,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-12-13 17:44:56,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 49. [2022-12-13 17:44:56,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:56,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-12-13 17:44:56,516 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2022-12-13 17:44:56,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:56,516 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-12-13 17:44:56,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:56,517 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-12-13 17:44:56,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 17:44:56,517 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:56,517 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:56,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-12-13 17:44:56,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:56,718 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:56,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:56,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1045875204, now seen corresponding path program 13 times [2022-12-13 17:44:56,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:56,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672497322] [2022-12-13 17:44:56,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:56,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:56,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:56,876 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:56,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:56,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672497322] [2022-12-13 17:44:56,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672497322] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:56,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825665873] [2022-12-13 17:44:56,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:44:56,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:56,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:56,877 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:56,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 17:44:56,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:56,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 17:44:56,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:57,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:57,216 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:57,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825665873] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:57,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:57,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 34 [2022-12-13 17:44:57,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973351442] [2022-12-13 17:44:57,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:57,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 17:44:57,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:57,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 17:44:57,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 17:44:57,218 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:57,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:57,612 INFO L93 Difference]: Finished difference Result 187 states and 200 transitions. [2022-12-13 17:44:57,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 17:44:57,612 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 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 35 [2022-12-13 17:44:57,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:57,613 INFO L225 Difference]: With dead ends: 187 [2022-12-13 17:44:57,613 INFO L226 Difference]: Without dead ends: 162 [2022-12-13 17:44:57,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 40 SyntacticMatches, 15 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=693, Invalid=3089, Unknown=0, NotChecked=0, Total=3782 [2022-12-13 17:44:57,614 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 155 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:57,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 207 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:44:57,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-12-13 17:44:57,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 49. [2022-12-13 17:44:57,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:57,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-12-13 17:44:57,633 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2022-12-13 17:44:57,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:57,634 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-12-13 17:44:57,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:57,634 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-12-13 17:44:57,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 17:44:57,634 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:57,634 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:57,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-12-13 17:44:57,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:57,836 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:57,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:57,836 INFO L85 PathProgramCache]: Analyzing trace with hash 985723933, now seen corresponding path program 14 times [2022-12-13 17:44:57,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:57,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037817877] [2022-12-13 17:44:57,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:57,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:57,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:57,997 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:57,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:57,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037817877] [2022-12-13 17:44:57,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037817877] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:57,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235019666] [2022-12-13 17:44:57,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:44:57,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:57,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:57,999 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:58,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 17:44:58,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:44:58,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:44:58,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 17:44:58,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:58,228 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:58,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:58,349 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:58,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235019666] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:58,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:58,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 33 [2022-12-13 17:44:58,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650077035] [2022-12-13 17:44:58,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:58,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 17:44:58,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:58,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 17:44:58,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 17:44:58,350 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:58,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:58,744 INFO L93 Difference]: Finished difference Result 213 states and 227 transitions. [2022-12-13 17:44:58,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 17:44:58,745 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 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 35 [2022-12-13 17:44:58,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:58,745 INFO L225 Difference]: With dead ends: 213 [2022-12-13 17:44:58,745 INFO L226 Difference]: Without dead ends: 188 [2022-12-13 17:44:58,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 15 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1405 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=673, Invalid=2987, Unknown=0, NotChecked=0, Total=3660 [2022-12-13 17:44:58,746 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 183 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:58,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 163 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:44:58,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-12-13 17:44:58,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 49. [2022-12-13 17:44:58,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:58,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-12-13 17:44:58,771 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2022-12-13 17:44:58,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:58,771 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-12-13 17:44:58,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:58,771 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-12-13 17:44:58,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 17:44:58,772 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:58,772 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:58,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-13 17:44:58,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-13 17:44:58,973 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:44:58,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:44:58,974 INFO L85 PathProgramCache]: Analyzing trace with hash -57119268, now seen corresponding path program 15 times [2022-12-13 17:44:58,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:44:58,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168669994] [2022-12-13 17:44:58,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:44:58,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:44:58,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:44:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 41 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:59,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:44:59,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168669994] [2022-12-13 17:44:59,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168669994] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:44:59,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717923434] [2022-12-13 17:44:59,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:44:59,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:44:59,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:59,125 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:44:59,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 17:44:59,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-13 17:44:59,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:44:59,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 17:44:59,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:44:59,338 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:59,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:44:59,445 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:44:59,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717923434] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:44:59,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:44:59,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 32 [2022-12-13 17:44:59,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147648211] [2022-12-13 17:44:59,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:44:59,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 17:44:59,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:44:59,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 17:44:59,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-12-13 17:44:59,447 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:59,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:44:59,904 INFO L93 Difference]: Finished difference Result 238 states and 253 transitions. [2022-12-13 17:44:59,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 17:44:59,905 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 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 35 [2022-12-13 17:44:59,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:44:59,905 INFO L225 Difference]: With dead ends: 238 [2022-12-13 17:44:59,905 INFO L226 Difference]: Without dead ends: 213 [2022-12-13 17:44:59,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 42 SyntacticMatches, 15 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=618, Invalid=2688, Unknown=0, NotChecked=0, Total=3306 [2022-12-13 17:44:59,906 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 175 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:44:59,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 184 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:44:59,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-12-13 17:44:59,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 49. [2022-12-13 17:44:59,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:59,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-12-13 17:44:59,928 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2022-12-13 17:44:59,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:44:59,928 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-12-13 17:44:59,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:44:59,928 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-12-13 17:44:59,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 17:44:59,928 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:44:59,928 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:44:59,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-13 17:45:00,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-13 17:45:00,129 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:00,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:00,130 INFO L85 PathProgramCache]: Analyzing trace with hash 186335293, now seen corresponding path program 6 times [2022-12-13 17:45:00,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:00,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613813241] [2022-12-13 17:45:00,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:00,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:00,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:00,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613813241] [2022-12-13 17:45:00,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613813241] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:00,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434739310] [2022-12-13 17:45:00,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:45:00,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:00,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:00,272 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:00,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-13 17:45:00,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-12-13 17:45:00,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:45:00,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 17:45:00,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:00,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:00,645 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:00,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434739310] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:00,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:00,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 31 [2022-12-13 17:45:00,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131014378] [2022-12-13 17:45:00,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:00,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 17:45:00,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:00,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 17:45:00,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2022-12-13 17:45:00,647 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:01,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:01,065 INFO L93 Difference]: Finished difference Result 265 states and 282 transitions. [2022-12-13 17:45:01,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 17:45:01,065 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 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 35 [2022-12-13 17:45:01,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:01,066 INFO L225 Difference]: With dead ends: 265 [2022-12-13 17:45:01,066 INFO L226 Difference]: Without dead ends: 240 [2022-12-13 17:45:01,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 43 SyntacticMatches, 15 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=545, Invalid=2211, Unknown=0, NotChecked=0, Total=2756 [2022-12-13 17:45:01,066 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 208 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:01,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 184 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:01,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-12-13 17:45:01,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 51. [2022-12-13 17:45:01,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:01,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2022-12-13 17:45:01,090 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 35 [2022-12-13 17:45:01,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:01,090 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2022-12-13 17:45:01,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:01,090 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2022-12-13 17:45:01,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-13 17:45:01,090 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:01,090 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:01,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-13 17:45:01,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:01,292 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:01,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:01,293 INFO L85 PathProgramCache]: Analyzing trace with hash 611977303, now seen corresponding path program 12 times [2022-12-13 17:45:01,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:01,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472450957] [2022-12-13 17:45:01,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:01,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 21 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:01,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:01,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472450957] [2022-12-13 17:45:01,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472450957] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:01,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307974528] [2022-12-13 17:45:01,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:45:01,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:01,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:01,416 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:01,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-13 17:45:01,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-12-13 17:45:01,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:45:01,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 17:45:01,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:01,488 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:01,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:01,563 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:01,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307974528] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:01,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:01,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2022-12-13 17:45:01,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348061064] [2022-12-13 17:45:01,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:01,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 17:45:01,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:01,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 17:45:01,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-12-13 17:45:01,564 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:01,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:01,690 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2022-12-13 17:45:01,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 17:45:01,691 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 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 36 [2022-12-13 17:45:01,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:01,691 INFO L225 Difference]: With dead ends: 62 [2022-12-13 17:45:01,691 INFO L226 Difference]: Without dead ends: 60 [2022-12-13 17:45:01,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 62 SyntacticMatches, 14 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2022-12-13 17:45:01,692 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 38 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:01,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 123 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:01,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-13 17:45:01,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2022-12-13 17:45:01,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:01,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-12-13 17:45:01,716 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 36 [2022-12-13 17:45:01,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:01,716 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-12-13 17:45:01,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:01,717 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-12-13 17:45:01,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-13 17:45:01,717 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:01,717 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:01,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-13 17:45:01,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-13 17:45:01,918 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:01,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:01,919 INFO L85 PathProgramCache]: Analyzing trace with hash -715494727, now seen corresponding path program 13 times [2022-12-13 17:45:01,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:01,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3082029] [2022-12-13 17:45:01,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:01,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:02,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:02,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3082029] [2022-12-13 17:45:02,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3082029] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:02,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614661235] [2022-12-13 17:45:02,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:45:02,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:02,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:02,131 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:02,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-13 17:45:02,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:02,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 17:45:02,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:02,415 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:02,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:02,534 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:02,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614661235] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:02,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:02,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2022-12-13 17:45:02,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563760050] [2022-12-13 17:45:02,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:02,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-13 17:45:02,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:02,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-13 17:45:02,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1323, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 17:45:02,536 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:02,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:02,855 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2022-12-13 17:45:02,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 17:45:02,856 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 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 39 [2022-12-13 17:45:02,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:02,856 INFO L225 Difference]: With dead ends: 116 [2022-12-13 17:45:02,856 INFO L226 Difference]: Without dead ends: 88 [2022-12-13 17:45:02,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 17 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=672, Invalid=2750, Unknown=0, NotChecked=0, Total=3422 [2022-12-13 17:45:02,857 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:02,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 177 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:02,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-13 17:45:02,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 55. [2022-12-13 17:45:02,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:02,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-12-13 17:45:02,886 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2022-12-13 17:45:02,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:02,886 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-12-13 17:45:02,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:02,886 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-12-13 17:45:02,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-13 17:45:02,886 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:02,886 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:02,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-13 17:45:03,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:03,088 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:03,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:03,089 INFO L85 PathProgramCache]: Analyzing trace with hash -944261768, now seen corresponding path program 16 times [2022-12-13 17:45:03,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:03,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585071167] [2022-12-13 17:45:03,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:03,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:03,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:03,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585071167] [2022-12-13 17:45:03,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585071167] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:03,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889851191] [2022-12-13 17:45:03,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:45:03,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:03,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:03,281 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:03,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-13 17:45:03,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:45:03,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:45:03,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 17:45:03,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:03,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:03,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889851191] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:03,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:03,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 40 [2022-12-13 17:45:03,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956901138] [2022-12-13 17:45:03,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:03,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 17:45:03,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:03,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 17:45:03,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 17:45:03,699 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 40 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:04,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:04,124 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2022-12-13 17:45:04,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 17:45:04,124 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 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 39 [2022-12-13 17:45:04,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:04,124 INFO L225 Difference]: With dead ends: 149 [2022-12-13 17:45:04,124 INFO L226 Difference]: Without dead ends: 121 [2022-12-13 17:45:04,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 42 SyntacticMatches, 17 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1822 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=770, Invalid=3390, Unknown=0, NotChecked=0, Total=4160 [2022-12-13 17:45:04,125 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 82 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:04,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 179 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:04,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-12-13 17:45:04,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 55. [2022-12-13 17:45:04,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:04,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-12-13 17:45:04,158 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2022-12-13 17:45:04,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:04,158 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-12-13 17:45:04,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:04,158 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-12-13 17:45:04,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-13 17:45:04,158 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:04,158 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:04,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-13 17:45:04,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-13 17:45:04,360 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:04,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:04,361 INFO L85 PathProgramCache]: Analyzing trace with hash -2060020007, now seen corresponding path program 17 times [2022-12-13 17:45:04,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:04,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495773829] [2022-12-13 17:45:04,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:04,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 58 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:04,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:04,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495773829] [2022-12-13 17:45:04,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495773829] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:04,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969724163] [2022-12-13 17:45:04,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:45:04,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:04,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:04,563 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:04,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-13 17:45:04,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-12-13 17:45:04,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:45:04,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 17:45:04,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:04,871 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:04,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:04,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969724163] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:04,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:04,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 39 [2022-12-13 17:45:04,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167141469] [2022-12-13 17:45:04,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:04,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 17:45:04,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:04,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 17:45:04,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 17:45:04,990 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:05,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:05,497 INFO L93 Difference]: Finished difference Result 181 states and 194 transitions. [2022-12-13 17:45:05,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 17:45:05,497 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 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 39 [2022-12-13 17:45:05,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:05,498 INFO L225 Difference]: With dead ends: 181 [2022-12-13 17:45:05,498 INFO L226 Difference]: Without dead ends: 153 [2022-12-13 17:45:05,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 43 SyntacticMatches, 17 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=851, Invalid=3841, Unknown=0, NotChecked=0, Total=4692 [2022-12-13 17:45:05,499 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 96 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:05,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 275 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:05,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-12-13 17:45:05,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 55. [2022-12-13 17:45:05,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:05,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-12-13 17:45:05,530 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2022-12-13 17:45:05,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:05,530 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-12-13 17:45:05,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:05,530 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-12-13 17:45:05,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-13 17:45:05,531 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:05,531 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:05,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-13 17:45:05,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-13 17:45:05,732 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:05,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:05,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1818917544, now seen corresponding path program 18 times [2022-12-13 17:45:05,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:05,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520051166] [2022-12-13 17:45:05,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:05,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:05,915 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 58 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:05,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:05,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520051166] [2022-12-13 17:45:05,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520051166] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:05,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872893792] [2022-12-13 17:45:05,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:45:05,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:05,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:05,917 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:05,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-13 17:45:05,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-12-13 17:45:05,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:45:05,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 17:45:05,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:06,224 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:06,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:06,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872893792] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:06,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:06,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 38 [2022-12-13 17:45:06,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239429301] [2022-12-13 17:45:06,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:06,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-13 17:45:06,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:06,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-13 17:45:06,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 17:45:06,362 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:06,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:06,956 INFO L93 Difference]: Finished difference Result 212 states and 226 transitions. [2022-12-13 17:45:06,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 17:45:06,956 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 states have internal predecessors, (78), 0 states have call successors, (0), 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 39 [2022-12-13 17:45:06,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:06,956 INFO L225 Difference]: With dead ends: 212 [2022-12-13 17:45:06,956 INFO L226 Difference]: Without dead ends: 184 [2022-12-13 17:45:06,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 44 SyntacticMatches, 17 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2013 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=894, Invalid=4076, Unknown=0, NotChecked=0, Total=4970 [2022-12-13 17:45:06,957 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 147 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:06,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 195 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:06,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-12-13 17:45:06,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 55. [2022-12-13 17:45:06,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:06,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-12-13 17:45:06,991 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2022-12-13 17:45:06,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:06,991 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-12-13 17:45:06,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:06,991 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-12-13 17:45:06,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-13 17:45:06,991 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:06,991 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:06,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-13 17:45:07,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 17:45:07,193 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:07,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:07,194 INFO L85 PathProgramCache]: Analyzing trace with hash 544164601, now seen corresponding path program 19 times [2022-12-13 17:45:07,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:07,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328634125] [2022-12-13 17:45:07,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:07,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:07,356 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 58 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:07,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:07,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328634125] [2022-12-13 17:45:07,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328634125] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:07,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046358050] [2022-12-13 17:45:07,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:45:07,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:07,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:07,357 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:07,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-13 17:45:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:07,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 17:45:07,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:07,642 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:07,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:07,817 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:07,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046358050] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:07,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:07,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 37 [2022-12-13 17:45:07,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188591485] [2022-12-13 17:45:07,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:07,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 17:45:07,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:07,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 17:45:07,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 17:45:07,819 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:08,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:08,487 INFO L93 Difference]: Finished difference Result 242 states and 257 transitions. [2022-12-13 17:45:08,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-13 17:45:08,487 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 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 39 [2022-12-13 17:45:08,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:08,487 INFO L225 Difference]: With dead ends: 242 [2022-12-13 17:45:08,487 INFO L226 Difference]: Without dead ends: 214 [2022-12-13 17:45:08,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 45 SyntacticMatches, 17 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1970 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=893, Invalid=4077, Unknown=0, NotChecked=0, Total=4970 [2022-12-13 17:45:08,488 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 192 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:08,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 184 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:08,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-12-13 17:45:08,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 55. [2022-12-13 17:45:08,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:08,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-12-13 17:45:08,522 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2022-12-13 17:45:08,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:08,522 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-12-13 17:45:08,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:08,522 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-12-13 17:45:08,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-13 17:45:08,523 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:08,523 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:08,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-12-13 17:45:08,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 17:45:08,724 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:08,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:08,725 INFO L85 PathProgramCache]: Analyzing trace with hash -765080264, now seen corresponding path program 20 times [2022-12-13 17:45:08,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:08,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846789896] [2022-12-13 17:45:08,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:08,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:08,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:08,901 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 58 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:08,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:08,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846789896] [2022-12-13 17:45:08,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846789896] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:08,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59102592] [2022-12-13 17:45:08,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:45:08,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:08,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:08,902 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:08,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-13 17:45:08,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:45:08,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:45:08,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 17:45:08,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:09,166 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:09,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:09,293 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:09,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59102592] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:09,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:09,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 36 [2022-12-13 17:45:09,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170978824] [2022-12-13 17:45:09,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:09,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 17:45:09,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:09,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 17:45:09,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 17:45:09,295 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:10,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:10,068 INFO L93 Difference]: Finished difference Result 271 states and 287 transitions. [2022-12-13 17:45:10,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-13 17:45:10,068 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 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 39 [2022-12-13 17:45:10,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:10,068 INFO L225 Difference]: With dead ends: 271 [2022-12-13 17:45:10,068 INFO L226 Difference]: Without dead ends: 243 [2022-12-13 17:45:10,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 46 SyntacticMatches, 17 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1827 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=848, Invalid=3844, Unknown=0, NotChecked=0, Total=4692 [2022-12-13 17:45:10,069 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 184 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:10,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 237 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:10,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-12-13 17:45:10,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 55. [2022-12-13 17:45:10,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:10,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-12-13 17:45:10,108 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2022-12-13 17:45:10,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:10,108 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-12-13 17:45:10,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:10,108 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-12-13 17:45:10,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-13 17:45:10,109 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:10,109 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:10,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-12-13 17:45:10,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:10,309 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:10,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:10,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1686538009, now seen corresponding path program 21 times [2022-12-13 17:45:10,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:10,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904023713] [2022-12-13 17:45:10,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:10,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:10,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:10,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904023713] [2022-12-13 17:45:10,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904023713] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:10,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049035582] [2022-12-13 17:45:10,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:45:10,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:10,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:10,479 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:10,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-13 17:45:10,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-12-13 17:45:10,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:45:10,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 17:45:10,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:10,818 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:10,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:10,986 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:10,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049035582] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:10,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:10,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 35 [2022-12-13 17:45:10,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302839709] [2022-12-13 17:45:10,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:10,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 17:45:10,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:10,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 17:45:10,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=963, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 17:45:10,987 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:11,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:11,731 INFO L93 Difference]: Finished difference Result 299 states and 316 transitions. [2022-12-13 17:45:11,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 17:45:11,732 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 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 39 [2022-12-13 17:45:11,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:11,733 INFO L225 Difference]: With dead ends: 299 [2022-12-13 17:45:11,733 INFO L226 Difference]: Without dead ends: 271 [2022-12-13 17:45:11,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 47 SyntacticMatches, 17 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1568 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=765, Invalid=3395, Unknown=0, NotChecked=0, Total=4160 [2022-12-13 17:45:11,734 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 228 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:11,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 219 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:11,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-12-13 17:45:11,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 55. [2022-12-13 17:45:11,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:11,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-12-13 17:45:11,774 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2022-12-13 17:45:11,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:11,774 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-12-13 17:45:11,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:11,774 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-12-13 17:45:11,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-13 17:45:11,774 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:11,774 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:11,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-13 17:45:11,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:11,975 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:11,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:11,976 INFO L85 PathProgramCache]: Analyzing trace with hash 241601816, now seen corresponding path program 7 times [2022-12-13 17:45:11,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:11,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416733963] [2022-12-13 17:45:11,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:11,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:12,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:12,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416733963] [2022-12-13 17:45:12,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416733963] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:12,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886366415] [2022-12-13 17:45:12,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:45:12,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:12,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:12,160 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:12,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-13 17:45:12,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:12,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 17:45:12,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:12,452 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:12,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:12,605 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:12,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886366415] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:12,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:12,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 34 [2022-12-13 17:45:12,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220299377] [2022-12-13 17:45:12,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:12,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 17:45:12,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:12,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 17:45:12,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 17:45:12,606 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:13,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:13,178 INFO L93 Difference]: Finished difference Result 329 states and 348 transitions. [2022-12-13 17:45:13,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 17:45:13,179 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 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 39 [2022-12-13 17:45:13,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:13,179 INFO L225 Difference]: With dead ends: 329 [2022-12-13 17:45:13,179 INFO L226 Difference]: Without dead ends: 301 [2022-12-13 17:45:13,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 48 SyntacticMatches, 17 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=665, Invalid=2757, Unknown=0, NotChecked=0, Total=3422 [2022-12-13 17:45:13,180 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 305 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:13,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 148 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:13,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-12-13 17:45:13,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 57. [2022-12-13 17:45:13,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:13,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-12-13 17:45:13,222 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 39 [2022-12-13 17:45:13,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:13,222 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-12-13 17:45:13,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:13,223 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-12-13 17:45:13,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-13 17:45:13,223 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:13,223 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:13,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-12-13 17:45:13,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:13,424 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:13,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:13,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1565543885, now seen corresponding path program 14 times [2022-12-13 17:45:13,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:13,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788177142] [2022-12-13 17:45:13,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:13,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:13,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:13,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788177142] [2022-12-13 17:45:13,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788177142] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:13,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425044247] [2022-12-13 17:45:13,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:45:13,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:13,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:13,527 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:13,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-13 17:45:13,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:45:13,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:45:13,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 17:45:13,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:13,600 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:13,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:13,686 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:13,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425044247] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:13,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:13,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2022-12-13 17:45:13,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500149378] [2022-12-13 17:45:13,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:13,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 17:45:13,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:13,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 17:45:13,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-12-13 17:45:13,688 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:13,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:13,865 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2022-12-13 17:45:13,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 17:45:13,865 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 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 40 [2022-12-13 17:45:13,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:13,865 INFO L225 Difference]: With dead ends: 68 [2022-12-13 17:45:13,865 INFO L226 Difference]: Without dead ends: 66 [2022-12-13 17:45:13,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 69 SyntacticMatches, 16 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2022-12-13 17:45:13,866 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 42 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:13,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 149 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:13,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-12-13 17:45:13,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2022-12-13 17:45:13,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 59 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:13,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-12-13 17:45:13,907 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 40 [2022-12-13 17:45:13,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:13,907 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-12-13 17:45:13,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:13,908 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-12-13 17:45:13,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 17:45:13,908 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:13,908 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:13,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-12-13 17:45:14,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:14,109 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:14,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:14,110 INFO L85 PathProgramCache]: Analyzing trace with hash -63167651, now seen corresponding path program 15 times [2022-12-13 17:45:14,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:14,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47057573] [2022-12-13 17:45:14,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:14,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:14,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:14,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:14,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47057573] [2022-12-13 17:45:14,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47057573] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:14,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003568367] [2022-12-13 17:45:14,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:45:14,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:14,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:14,315 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:14,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-13 17:45:14,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-13 17:45:14,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:45:14,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 17:45:14,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:14,738 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:14,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:14,907 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:14,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003568367] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:14,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:14,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2022-12-13 17:45:14,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150869192] [2022-12-13 17:45:14,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:14,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-13 17:45:14,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:14,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-13 17:45:14,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1599, Unknown=0, NotChecked=0, Total=1980 [2022-12-13 17:45:14,908 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:15,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:15,234 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2022-12-13 17:45:15,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 17:45:15,234 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-12-13 17:45:15,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:15,234 INFO L225 Difference]: With dead ends: 129 [2022-12-13 17:45:15,234 INFO L226 Difference]: Without dead ends: 98 [2022-12-13 17:45:15,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 45 SyntacticMatches, 19 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2013 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=805, Invalid=3355, Unknown=0, NotChecked=0, Total=4160 [2022-12-13 17:45:15,235 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 41 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:15,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 153 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:15,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-12-13 17:45:15,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2022-12-13 17:45:15,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:15,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-12-13 17:45:15,283 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-12-13 17:45:15,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:15,283 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-12-13 17:45:15,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:15,283 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-12-13 17:45:15,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 17:45:15,284 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:15,284 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:15,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-12-13 17:45:15,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-12-13 17:45:15,485 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:15,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:15,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1788348772, now seen corresponding path program 22 times [2022-12-13 17:45:15,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:15,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230997185] [2022-12-13 17:45:15,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:15,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:15,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:15,671 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 78 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:15,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:15,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230997185] [2022-12-13 17:45:15,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230997185] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:15,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700549739] [2022-12-13 17:45:15,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:45:15,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:15,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:15,672 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:15,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-13 17:45:15,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:45:15,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:45:15,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 17:45:15,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:16,032 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:16,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:16,192 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:16,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700549739] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:16,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:16,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 44 [2022-12-13 17:45:16,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542496503] [2022-12-13 17:45:16,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:16,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-13 17:45:16,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:16,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-13 17:45:16,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1539, Unknown=0, NotChecked=0, Total=1892 [2022-12-13 17:45:16,194 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:16,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:16,791 INFO L93 Difference]: Finished difference Result 166 states and 179 transitions. [2022-12-13 17:45:16,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 17:45:16,791 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-12-13 17:45:16,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:16,792 INFO L225 Difference]: With dead ends: 166 [2022-12-13 17:45:16,792 INFO L226 Difference]: Without dead ends: 135 [2022-12-13 17:45:16,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 46 SyntacticMatches, 19 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2291 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=934, Invalid=4178, Unknown=0, NotChecked=0, Total=5112 [2022-12-13 17:45:16,792 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 93 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:16,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 178 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:16,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-12-13 17:45:16,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 61. [2022-12-13 17:45:16,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:16,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-12-13 17:45:16,846 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-12-13 17:45:16,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:16,846 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-12-13 17:45:16,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:16,846 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-12-13 17:45:16,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 17:45:16,846 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:16,846 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:16,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-12-13 17:45:17,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:17,047 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:17,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:17,048 INFO L85 PathProgramCache]: Analyzing trace with hash -874168451, now seen corresponding path program 23 times [2022-12-13 17:45:17,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:17,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959372042] [2022-12-13 17:45:17,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:17,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:17,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 78 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:17,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:17,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959372042] [2022-12-13 17:45:17,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959372042] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:17,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916367304] [2022-12-13 17:45:17,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:45:17,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:17,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:17,258 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:17,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-12-13 17:45:17,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-12-13 17:45:17,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:45:17,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 17:45:17,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:17,557 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:17,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:17,681 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:17,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916367304] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:17,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:17,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 43 [2022-12-13 17:45:17,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327147383] [2022-12-13 17:45:17,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:17,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-13 17:45:17,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:17,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-13 17:45:17,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1477, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 17:45:17,682 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:18,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:18,211 INFO L93 Difference]: Finished difference Result 202 states and 216 transitions. [2022-12-13 17:45:18,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 17:45:18,211 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-12-13 17:45:18,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:18,212 INFO L225 Difference]: With dead ends: 202 [2022-12-13 17:45:18,212 INFO L226 Difference]: Without dead ends: 171 [2022-12-13 17:45:18,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 19 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2502 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1048, Invalid=4804, Unknown=0, NotChecked=0, Total=5852 [2022-12-13 17:45:18,213 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 108 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:18,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 230 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:18,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-12-13 17:45:18,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 61. [2022-12-13 17:45:18,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:18,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-12-13 17:45:18,268 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-12-13 17:45:18,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:18,268 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-12-13 17:45:18,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:18,269 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-12-13 17:45:18,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 17:45:18,269 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:18,269 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:18,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-12-13 17:45:18,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-12-13 17:45:18,470 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:18,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:18,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1675962756, now seen corresponding path program 24 times [2022-12-13 17:45:18,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:18,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343408484] [2022-12-13 17:45:18,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:18,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:18,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:18,702 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:18,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:18,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343408484] [2022-12-13 17:45:18,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343408484] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:18,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912992405] [2022-12-13 17:45:18,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:45:18,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:18,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:18,703 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:18,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-13 17:45:18,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-12-13 17:45:18,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:45:18,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 17:45:18,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:18,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:19,179 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:19,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912992405] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:19,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:19,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 42 [2022-12-13 17:45:19,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828677079] [2022-12-13 17:45:19,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:19,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-13 17:45:19,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:19,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-13 17:45:19,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 17:45:19,181 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:20,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:20,171 INFO L93 Difference]: Finished difference Result 237 states and 252 transitions. [2022-12-13 17:45:20,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-13 17:45:20,172 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-12-13 17:45:20,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:20,172 INFO L225 Difference]: With dead ends: 237 [2022-12-13 17:45:20,172 INFO L226 Difference]: Without dead ends: 206 [2022-12-13 17:45:20,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 48 SyntacticMatches, 19 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2618 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1122, Invalid=5198, Unknown=0, NotChecked=0, Total=6320 [2022-12-13 17:45:20,173 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 161 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:20,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 202 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:20,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-12-13 17:45:20,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 61. [2022-12-13 17:45:20,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:20,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-12-13 17:45:20,230 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-12-13 17:45:20,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:20,230 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-12-13 17:45:20,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:20,230 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-12-13 17:45:20,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 17:45:20,230 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:20,230 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:20,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-12-13 17:45:20,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-12-13 17:45:20,431 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:20,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:20,432 INFO L85 PathProgramCache]: Analyzing trace with hash -177806435, now seen corresponding path program 25 times [2022-12-13 17:45:20,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:20,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184649544] [2022-12-13 17:45:20,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:20,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:20,604 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:20,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:20,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184649544] [2022-12-13 17:45:20,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184649544] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:20,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216791802] [2022-12-13 17:45:20,604 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:45:20,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:20,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:20,605 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:20,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-12-13 17:45:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:20,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 17:45:20,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:20,921 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 100 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:20,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:21,107 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 100 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:21,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216791802] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:21,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:21,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 41 [2022-12-13 17:45:21,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359882245] [2022-12-13 17:45:21,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:21,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-13 17:45:21,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:21,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-13 17:45:21,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1347, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 17:45:21,109 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:22,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:22,121 INFO L93 Difference]: Finished difference Result 271 states and 287 transitions. [2022-12-13 17:45:22,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-13 17:45:22,122 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-12-13 17:45:22,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:22,123 INFO L225 Difference]: With dead ends: 271 [2022-12-13 17:45:22,123 INFO L226 Difference]: Without dead ends: 240 [2022-12-13 17:45:22,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 19 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1147, Invalid=5333, Unknown=0, NotChecked=0, Total=6480 [2022-12-13 17:45:22,124 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 201 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:22,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 195 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:22,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-12-13 17:45:22,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 61. [2022-12-13 17:45:22,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:22,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-12-13 17:45:22,185 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-12-13 17:45:22,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:22,185 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-12-13 17:45:22,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:22,185 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-12-13 17:45:22,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 17:45:22,185 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:22,186 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:22,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-12-13 17:45:22,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-12-13 17:45:22,386 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:22,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:22,387 INFO L85 PathProgramCache]: Analyzing trace with hash -406573476, now seen corresponding path program 26 times [2022-12-13 17:45:22,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:22,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821620276] [2022-12-13 17:45:22,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:22,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:22,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:22,584 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:22,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:22,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821620276] [2022-12-13 17:45:22,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821620276] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:22,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873527455] [2022-12-13 17:45:22,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:45:22,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:22,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:22,586 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:22,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-13 17:45:22,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:45:22,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:45:22,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 17:45:22,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:22,869 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:22,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:23,026 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:23,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873527455] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:23,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:23,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 40 [2022-12-13 17:45:23,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938344957] [2022-12-13 17:45:23,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:23,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 17:45:23,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:23,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 17:45:23,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1279, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 17:45:23,027 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:23,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:23,907 INFO L93 Difference]: Finished difference Result 304 states and 321 transitions. [2022-12-13 17:45:23,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-13 17:45:23,908 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-12-13 17:45:23,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:23,908 INFO L225 Difference]: With dead ends: 304 [2022-12-13 17:45:23,908 INFO L226 Difference]: Without dead ends: 273 [2022-12-13 17:45:23,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 50 SyntacticMatches, 19 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2526 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1120, Invalid=5200, Unknown=0, NotChecked=0, Total=6320 [2022-12-13 17:45:23,909 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 263 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:23,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 227 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:23,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-12-13 17:45:23,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 61. [2022-12-13 17:45:23,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:23,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-12-13 17:45:23,968 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-12-13 17:45:23,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:23,969 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-12-13 17:45:23,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:23,969 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-12-13 17:45:23,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 17:45:23,969 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:23,969 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:23,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-12-13 17:45:24,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-12-13 17:45:24,170 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:24,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:24,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1522331715, now seen corresponding path program 27 times [2022-12-13 17:45:24,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:24,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428587801] [2022-12-13 17:45:24,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:24,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:24,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:24,365 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 78 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:24,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:24,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428587801] [2022-12-13 17:45:24,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428587801] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:24,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546016021] [2022-12-13 17:45:24,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:45:24,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:24,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:24,367 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:24,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-12-13 17:45:24,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-13 17:45:24,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:45:24,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 17:45:24,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:24,713 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:24,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:24,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546016021] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:24,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:24,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 39 [2022-12-13 17:45:24,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590602394] [2022-12-13 17:45:24,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:24,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 17:45:24,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:24,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 17:45:24,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1209, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 17:45:24,915 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:25,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:25,957 INFO L93 Difference]: Finished difference Result 336 states and 354 transitions. [2022-12-13 17:45:25,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-13 17:45:25,957 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-12-13 17:45:25,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:25,958 INFO L225 Difference]: With dead ends: 336 [2022-12-13 17:45:25,958 INFO L226 Difference]: Without dead ends: 305 [2022-12-13 17:45:25,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 51 SyntacticMatches, 19 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2306 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1044, Invalid=4808, Unknown=0, NotChecked=0, Total=5852 [2022-12-13 17:45:25,958 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 253 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:25,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 206 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:25,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-12-13 17:45:26,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 61. [2022-12-13 17:45:26,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:26,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-12-13 17:45:26,020 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-12-13 17:45:26,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:26,020 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-12-13 17:45:26,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:26,020 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-12-13 17:45:26,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 17:45:26,021 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:26,021 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:26,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-12-13 17:45:26,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-12-13 17:45:26,222 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:26,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:26,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1281229252, now seen corresponding path program 28 times [2022-12-13 17:45:26,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:26,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162672561] [2022-12-13 17:45:26,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:26,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 78 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:26,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:26,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162672561] [2022-12-13 17:45:26,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162672561] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:26,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542730988] [2022-12-13 17:45:26,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:45:26,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:26,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:26,436 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:26,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-12-13 17:45:26,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:45:26,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:45:26,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 17:45:26,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:26,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:27,005 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:27,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542730988] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:27,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:27,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 38 [2022-12-13 17:45:27,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54035987] [2022-12-13 17:45:27,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:27,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-13 17:45:27,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:27,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-13 17:45:27,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 17:45:27,007 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:28,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:28,116 INFO L93 Difference]: Finished difference Result 367 states and 386 transitions. [2022-12-13 17:45:28,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-13 17:45:28,116 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-12-13 17:45:28,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:28,117 INFO L225 Difference]: With dead ends: 367 [2022-12-13 17:45:28,117 INFO L226 Difference]: Without dead ends: 336 [2022-12-13 17:45:28,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 52 SyntacticMatches, 19 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1957 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=928, Invalid=4184, Unknown=0, NotChecked=0, Total=5112 [2022-12-13 17:45:28,117 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 229 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:28,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 254 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:28,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-12-13 17:45:28,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 61. [2022-12-13 17:45:28,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:28,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-12-13 17:45:28,183 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-12-13 17:45:28,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:28,183 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-12-13 17:45:28,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:28,183 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-12-13 17:45:28,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 17:45:28,183 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:28,183 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:28,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-12-13 17:45:28,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:28,384 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:28,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:28,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1081852893, now seen corresponding path program 8 times [2022-12-13 17:45:28,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:28,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376182202] [2022-12-13 17:45:28,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:28,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:28,614 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:28,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:28,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376182202] [2022-12-13 17:45:28,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376182202] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:28,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102513529] [2022-12-13 17:45:28,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:45:28,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:28,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:28,616 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:28,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-12-13 17:45:28,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:45:28,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:45:28,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 17:45:28,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:28,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:28,998 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:28,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102513529] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:28,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:28,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 37 [2022-12-13 17:45:28,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134501159] [2022-12-13 17:45:28,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:28,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 17:45:28,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:29,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 17:45:29,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1063, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 17:45:29,000 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:30,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:30,013 INFO L93 Difference]: Finished difference Result 400 states and 421 transitions. [2022-12-13 17:45:30,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 17:45:30,013 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-12-13 17:45:30,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:30,014 INFO L225 Difference]: With dead ends: 400 [2022-12-13 17:45:30,014 INFO L226 Difference]: Without dead ends: 369 [2022-12-13 17:45:30,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 53 SyntacticMatches, 19 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=797, Invalid=3363, Unknown=0, NotChecked=0, Total=4160 [2022-12-13 17:45:30,014 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 311 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:30,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 180 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:30,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-12-13 17:45:30,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 63. [2022-12-13 17:45:30,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 62 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:30,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2022-12-13 17:45:30,079 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 43 [2022-12-13 17:45:30,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:30,079 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2022-12-13 17:45:30,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:30,079 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2022-12-13 17:45:30,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-13 17:45:30,079 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:30,079 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:30,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-12-13 17:45:30,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:30,281 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:30,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:30,282 INFO L85 PathProgramCache]: Analyzing trace with hash 105717207, now seen corresponding path program 16 times [2022-12-13 17:45:30,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:30,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752938039] [2022-12-13 17:45:30,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:30,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:30,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:30,409 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 36 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:30,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:30,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752938039] [2022-12-13 17:45:30,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752938039] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:30,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720467533] [2022-12-13 17:45:30,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:45:30,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:30,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:30,411 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:30,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-12-13 17:45:30,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:45:30,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:45:30,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 17:45:30,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:30,495 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:30,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:30,567 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:30,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720467533] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:30,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:30,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2022-12-13 17:45:30,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7596102] [2022-12-13 17:45:30,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:30,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 17:45:30,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:30,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 17:45:30,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-12-13 17:45:30,568 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:30,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:30,841 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2022-12-13 17:45:30,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 17:45:30,841 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 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 44 [2022-12-13 17:45:30,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:30,842 INFO L225 Difference]: With dead ends: 74 [2022-12-13 17:45:30,842 INFO L226 Difference]: Without dead ends: 72 [2022-12-13 17:45:30,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 76 SyntacticMatches, 18 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=228, Invalid=422, Unknown=0, NotChecked=0, Total=650 [2022-12-13 17:45:30,842 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 44 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:30,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 154 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:30,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-13 17:45:30,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2022-12-13 17:45:30,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 65 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:30,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2022-12-13 17:45:30,909 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 44 [2022-12-13 17:45:30,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:30,909 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2022-12-13 17:45:30,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:30,909 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2022-12-13 17:45:30,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-13 17:45:30,909 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:30,909 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:30,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-12-13 17:45:31,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-12-13 17:45:31,111 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:31,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:31,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1215128889, now seen corresponding path program 17 times [2022-12-13 17:45:31,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:31,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291984987] [2022-12-13 17:45:31,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:31,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:31,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:31,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291984987] [2022-12-13 17:45:31,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291984987] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:31,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321750623] [2022-12-13 17:45:31,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:45:31,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:31,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:31,341 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:31,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-12-13 17:45:31,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-12-13 17:45:31,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:45:31,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 17:45:31,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:31,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:31,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321750623] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:31,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:31,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-12-13 17:45:31,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554984169] [2022-12-13 17:45:31,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:31,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-13 17:45:31,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:31,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-13 17:45:31,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=1901, Unknown=0, NotChecked=0, Total=2352 [2022-12-13 17:45:31,875 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 49 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:32,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:32,466 INFO L93 Difference]: Finished difference Result 142 states and 155 transitions. [2022-12-13 17:45:32,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 17:45:32,466 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 49 states have internal predecessors, (97), 0 states have call successors, (0), 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 47 [2022-12-13 17:45:32,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:32,466 INFO L225 Difference]: With dead ends: 142 [2022-12-13 17:45:32,466 INFO L226 Difference]: Without dead ends: 108 [2022-12-13 17:45:32,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 49 SyntacticMatches, 21 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2453 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=950, Invalid=4020, Unknown=0, NotChecked=0, Total=4970 [2022-12-13 17:45:32,467 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 75 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:32,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 165 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:32,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-12-13 17:45:32,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 67. [2022-12-13 17:45:32,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:32,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-12-13 17:45:32,564 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-12-13 17:45:32,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:32,565 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-12-13 17:45:32,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 49 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:32,565 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-12-13 17:45:32,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-13 17:45:32,565 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:32,565 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:32,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-12-13 17:45:32,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-12-13 17:45:32,766 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:32,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:32,767 INFO L85 PathProgramCache]: Analyzing trace with hash -185630472, now seen corresponding path program 29 times [2022-12-13 17:45:32,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:32,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600655942] [2022-12-13 17:45:32,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:32,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:33,039 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 101 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:33,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:33,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600655942] [2022-12-13 17:45:33,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600655942] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:33,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142706353] [2022-12-13 17:45:33,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:45:33,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:33,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:33,040 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:33,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-12-13 17:45:33,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-12-13 17:45:33,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:45:33,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 17:45:33,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:33,509 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:33,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:33,732 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:33,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142706353] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:33,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:33,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2022-12-13 17:45:33,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487804895] [2022-12-13 17:45:33,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:33,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-13 17:45:33,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:33,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-13 17:45:33,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=1836, Unknown=0, NotChecked=0, Total=2256 [2022-12-13 17:45:33,734 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:34,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:34,673 INFO L93 Difference]: Finished difference Result 183 states and 197 transitions. [2022-12-13 17:45:34,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 17:45:34,673 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-12-13 17:45:34,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:34,674 INFO L225 Difference]: With dead ends: 183 [2022-12-13 17:45:34,674 INFO L226 Difference]: Without dead ends: 149 [2022-12-13 17:45:34,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 50 SyntacticMatches, 21 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2813 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1114, Invalid=5048, Unknown=0, NotChecked=0, Total=6162 [2022-12-13 17:45:34,674 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 77 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:34,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 215 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:34,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-12-13 17:45:34,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 67. [2022-12-13 17:45:34,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:34,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-12-13 17:45:34,754 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-12-13 17:45:34,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:34,754 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-12-13 17:45:34,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:34,754 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-12-13 17:45:34,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-13 17:45:34,754 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:34,754 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:34,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-12-13 17:45:34,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-12-13 17:45:34,956 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:34,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:34,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1477742247, now seen corresponding path program 30 times [2022-12-13 17:45:34,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:34,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078380855] [2022-12-13 17:45:34,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:34,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:34,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:35,204 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 101 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:35,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:35,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078380855] [2022-12-13 17:45:35,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078380855] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:35,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542718145] [2022-12-13 17:45:35,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:45:35,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:35,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:35,205 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:35,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-12-13 17:45:35,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-12-13 17:45:35,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:45:35,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 17:45:35,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:35,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:35,909 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:35,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542718145] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:35,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:35,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 47 [2022-12-13 17:45:35,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428853638] [2022-12-13 17:45:35,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:35,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-13 17:45:35,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:35,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-13 17:45:35,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1769, Unknown=0, NotChecked=0, Total=2162 [2022-12-13 17:45:35,910 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:36,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:36,932 INFO L93 Difference]: Finished difference Result 223 states and 238 transitions. [2022-12-13 17:45:36,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-13 17:45:36,932 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-12-13 17:45:36,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:36,932 INFO L225 Difference]: With dead ends: 223 [2022-12-13 17:45:36,932 INFO L226 Difference]: Without dead ends: 189 [2022-12-13 17:45:36,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 51 SyntacticMatches, 21 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3107 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1266, Invalid=5874, Unknown=0, NotChecked=0, Total=7140 [2022-12-13 17:45:36,933 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 94 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:36,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 232 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:36,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-12-13 17:45:37,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 67. [2022-12-13 17:45:37,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:37,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-12-13 17:45:37,015 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-12-13 17:45:37,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:37,015 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-12-13 17:45:37,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:37,015 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-12-13 17:45:37,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-13 17:45:37,015 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:37,015 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:37,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-12-13 17:45:37,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-12-13 17:45:37,217 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:37,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:37,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1519423272, now seen corresponding path program 31 times [2022-12-13 17:45:37,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:37,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042405279] [2022-12-13 17:45:37,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:37,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:37,430 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 101 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:37,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:37,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042405279] [2022-12-13 17:45:37,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042405279] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:37,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899628662] [2022-12-13 17:45:37,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:45:37,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:37,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:37,431 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:37,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-12-13 17:45:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:37,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 17:45:37,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:37,797 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:37,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:37,968 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:37,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899628662] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:37,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:37,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 46 [2022-12-13 17:45:37,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640339639] [2022-12-13 17:45:37,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:37,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-13 17:45:37,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:37,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-13 17:45:37,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1700, Unknown=0, NotChecked=0, Total=2070 [2022-12-13 17:45:37,969 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:39,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:39,073 INFO L93 Difference]: Finished difference Result 262 states and 278 transitions. [2022-12-13 17:45:39,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-13 17:45:39,073 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 0 states have call successors, (0), 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 47 [2022-12-13 17:45:39,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:39,073 INFO L225 Difference]: With dead ends: 262 [2022-12-13 17:45:39,073 INFO L226 Difference]: Without dead ends: 228 [2022-12-13 17:45:39,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 52 SyntacticMatches, 21 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3302 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1377, Invalid=6455, Unknown=0, NotChecked=0, Total=7832 [2022-12-13 17:45:39,074 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 134 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:39,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 257 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:39,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-12-13 17:45:39,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 67. [2022-12-13 17:45:39,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:39,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-12-13 17:45:39,163 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-12-13 17:45:39,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:39,163 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-12-13 17:45:39,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:39,163 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-12-13 17:45:39,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-13 17:45:39,163 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:39,163 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:39,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-12-13 17:45:39,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-12-13 17:45:39,364 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:39,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:39,364 INFO L85 PathProgramCache]: Analyzing trace with hash 834536825, now seen corresponding path program 32 times [2022-12-13 17:45:39,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:39,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856060466] [2022-12-13 17:45:39,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:39,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:39,547 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 101 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:39,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:39,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856060466] [2022-12-13 17:45:39,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856060466] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:39,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166528366] [2022-12-13 17:45:39,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:45:39,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:39,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:39,548 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:39,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-12-13 17:45:39,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:45:39,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:45:39,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 17:45:39,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:39,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:40,055 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:40,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166528366] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:40,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:40,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 45 [2022-12-13 17:45:40,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104635714] [2022-12-13 17:45:40,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:40,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-13 17:45:40,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:40,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-13 17:45:40,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1629, Unknown=0, NotChecked=0, Total=1980 [2022-12-13 17:45:40,057 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 45 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:41,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:41,336 INFO L93 Difference]: Finished difference Result 300 states and 317 transitions. [2022-12-13 17:45:41,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-13 17:45:41,337 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 45 states have internal predecessors, (93), 0 states have call successors, (0), 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 47 [2022-12-13 17:45:41,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:41,338 INFO L225 Difference]: With dead ends: 300 [2022-12-13 17:45:41,338 INFO L226 Difference]: Without dead ends: 266 [2022-12-13 17:45:41,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 53 SyntacticMatches, 21 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3383 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1435, Invalid=6755, Unknown=0, NotChecked=0, Total=8190 [2022-12-13 17:45:41,339 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 202 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:41,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 256 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:41,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-12-13 17:45:41,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 67. [2022-12-13 17:45:41,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:41,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-12-13 17:45:41,429 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-12-13 17:45:41,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:41,429 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-12-13 17:45:41,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 45 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:41,429 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-12-13 17:45:41,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-13 17:45:41,429 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:41,429 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:41,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-12-13 17:45:41,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:41,630 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:41,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:41,631 INFO L85 PathProgramCache]: Analyzing trace with hash -890644296, now seen corresponding path program 33 times [2022-12-13 17:45:41,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:41,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831196784] [2022-12-13 17:45:41,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:41,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 101 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:41,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:41,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831196784] [2022-12-13 17:45:41,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831196784] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:41,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730973590] [2022-12-13 17:45:41,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:45:41,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:41,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:41,858 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:41,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-12-13 17:45:41,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-12-13 17:45:41,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:45:41,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 17:45:41,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:42,258 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:42,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:42,473 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:42,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730973590] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:42,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:42,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 44 [2022-12-13 17:45:42,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598988969] [2022-12-13 17:45:42,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:42,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-13 17:45:42,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:42,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-13 17:45:42,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=1556, Unknown=0, NotChecked=0, Total=1892 [2022-12-13 17:45:42,475 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:44,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:44,093 INFO L93 Difference]: Finished difference Result 337 states and 355 transitions. [2022-12-13 17:45:44,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-13 17:45:44,093 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2022-12-13 17:45:44,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:44,094 INFO L225 Difference]: With dead ends: 337 [2022-12-13 17:45:44,094 INFO L226 Difference]: Without dead ends: 303 [2022-12-13 17:45:44,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 54 SyntacticMatches, 21 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3336 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1434, Invalid=6756, Unknown=0, NotChecked=0, Total=8190 [2022-12-13 17:45:44,095 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 232 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:44,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 236 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:44,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-12-13 17:45:44,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 67. [2022-12-13 17:45:44,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:44,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-12-13 17:45:44,187 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-12-13 17:45:44,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:44,187 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-12-13 17:45:44,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:44,187 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-12-13 17:45:44,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-13 17:45:44,187 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:44,187 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:44,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-12-13 17:45:44,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-12-13 17:45:44,388 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:44,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:44,389 INFO L85 PathProgramCache]: Analyzing trace with hash 23536025, now seen corresponding path program 34 times [2022-12-13 17:45:44,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:44,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443865937] [2022-12-13 17:45:44,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:44,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:44,651 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 101 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:44,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:44,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443865937] [2022-12-13 17:45:44,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443865937] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:44,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4779323] [2022-12-13 17:45:44,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:45:44,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:44,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:44,652 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:44,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-12-13 17:45:44,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:45:44,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:45:44,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 17:45:44,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:44,968 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:44,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:45,121 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:45,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4779323] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:45,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:45,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 43 [2022-12-13 17:45:45,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521644900] [2022-12-13 17:45:45,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:45,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-13 17:45:45,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:45,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-13 17:45:45,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1481, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 17:45:45,123 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:46,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:46,503 INFO L93 Difference]: Finished difference Result 373 states and 392 transitions. [2022-12-13 17:45:46,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-13 17:45:46,503 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 0 states have call successors, (0), 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 47 [2022-12-13 17:45:46,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:46,504 INFO L225 Difference]: With dead ends: 373 [2022-12-13 17:45:46,504 INFO L226 Difference]: Without dead ends: 339 [2022-12-13 17:45:46,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 55 SyntacticMatches, 21 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3155 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1374, Invalid=6458, Unknown=0, NotChecked=0, Total=7832 [2022-12-13 17:45:46,505 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 238 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:46,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 247 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:46,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-12-13 17:45:46,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 67. [2022-12-13 17:45:46,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:46,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-12-13 17:45:46,600 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-12-13 17:45:46,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:46,600 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-12-13 17:45:46,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:46,601 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-12-13 17:45:46,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-13 17:45:46,601 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:46,601 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:46,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-12-13 17:45:46,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:46,802 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:46,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:46,803 INFO L85 PathProgramCache]: Analyzing trace with hash -778258280, now seen corresponding path program 35 times [2022-12-13 17:45:46,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:46,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620724472] [2022-12-13 17:45:46,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:46,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 101 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:47,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:47,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620724472] [2022-12-13 17:45:47,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620724472] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:47,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781584420] [2022-12-13 17:45:47,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:45:47,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:47,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:47,067 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:47,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-12-13 17:45:47,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-12-13 17:45:47,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:45:47,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 17:45:47,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:47,436 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:47,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:47,584 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:47,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781584420] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:47,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:47,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 42 [2022-12-13 17:45:47,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191503738] [2022-12-13 17:45:47,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:47,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-13 17:45:47,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:47,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-13 17:45:47,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1404, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 17:45:47,585 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:48,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:48,782 INFO L93 Difference]: Finished difference Result 408 states and 428 transitions. [2022-12-13 17:45:48,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-13 17:45:48,782 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-12-13 17:45:48,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:48,783 INFO L225 Difference]: With dead ends: 408 [2022-12-13 17:45:48,783 INFO L226 Difference]: Without dead ends: 374 [2022-12-13 17:45:48,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 56 SyntacticMatches, 21 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2842 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1261, Invalid=5879, Unknown=0, NotChecked=0, Total=7140 [2022-12-13 17:45:48,784 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 249 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:48,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 265 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:48,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-12-13 17:45:48,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 67. [2022-12-13 17:45:48,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:48,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-12-13 17:45:48,881 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-12-13 17:45:48,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:48,882 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-12-13 17:45:48,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:48,882 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-12-13 17:45:48,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-13 17:45:48,882 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:48,882 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:48,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-12-13 17:45:49,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:49,083 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:49,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:49,084 INFO L85 PathProgramCache]: Analyzing trace with hash 719898041, now seen corresponding path program 36 times [2022-12-13 17:45:49,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:49,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678422328] [2022-12-13 17:45:49,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:49,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:49,288 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 101 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:49,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:49,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678422328] [2022-12-13 17:45:49,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678422328] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:49,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660785469] [2022-12-13 17:45:49,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:45:49,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:49,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:49,290 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:49,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-12-13 17:45:49,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-12-13 17:45:49,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:45:49,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 17:45:49,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:49,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:49,755 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:49,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660785469] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:49,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:49,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 41 [2022-12-13 17:45:49,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279868777] [2022-12-13 17:45:49,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:49,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-13 17:45:49,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:49,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-13 17:45:49,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1325, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 17:45:49,757 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:50,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:50,941 INFO L93 Difference]: Finished difference Result 442 states and 463 transitions. [2022-12-13 17:45:50,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-13 17:45:50,942 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 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 47 [2022-12-13 17:45:50,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:50,942 INFO L225 Difference]: With dead ends: 442 [2022-12-13 17:45:50,942 INFO L226 Difference]: Without dead ends: 408 [2022-12-13 17:45:50,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 57 SyntacticMatches, 21 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2389 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1107, Invalid=5055, Unknown=0, NotChecked=0, Total=6162 [2022-12-13 17:45:50,943 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 318 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:50,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 236 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:50,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-12-13 17:45:51,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 67. [2022-12-13 17:45:51,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:51,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-12-13 17:45:51,040 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-12-13 17:45:51,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:51,040 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-12-13 17:45:51,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:51,041 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-12-13 17:45:51,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-13 17:45:51,041 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:51,041 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:51,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-12-13 17:45:51,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-12-13 17:45:51,242 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:51,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:51,244 INFO L85 PathProgramCache]: Analyzing trace with hash 491131000, now seen corresponding path program 9 times [2022-12-13 17:45:51,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:51,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008620619] [2022-12-13 17:45:51,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:51,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:51,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:51,504 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:51,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:51,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008620619] [2022-12-13 17:45:51,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008620619] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:51,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913061741] [2022-12-13 17:45:51,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:45:51,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:51,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:51,505 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:51,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-12-13 17:45:51,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-12-13 17:45:51,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:45:51,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 17:45:51,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:51,817 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:51,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:51,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913061741] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:51,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:51,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 40 [2022-12-13 17:45:51,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826996372] [2022-12-13 17:45:51,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:51,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 17:45:51,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:51,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 17:45:51,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1244, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 17:45:51,975 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 40 states, 40 states have (on average 2.2) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:53,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:53,232 INFO L93 Difference]: Finished difference Result 478 states and 501 transitions. [2022-12-13 17:45:53,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-13 17:45:53,232 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-12-13 17:45:53,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:53,233 INFO L225 Difference]: With dead ends: 478 [2022-12-13 17:45:53,233 INFO L226 Difference]: Without dead ends: 444 [2022-12-13 17:45:53,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 58 SyntacticMatches, 21 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1871 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=941, Invalid=4029, Unknown=0, NotChecked=0, Total=4970 [2022-12-13 17:45:53,234 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 408 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:53,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 211 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:53,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-12-13 17:45:53,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 69. [2022-12-13 17:45:53,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 68 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:53,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2022-12-13 17:45:53,337 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 47 [2022-12-13 17:45:53,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:53,337 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2022-12-13 17:45:53,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:53,337 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2022-12-13 17:45:53,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-13 17:45:53,338 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:53,338 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:53,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-12-13 17:45:53,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:53,539 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:53,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:53,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1809280333, now seen corresponding path program 18 times [2022-12-13 17:45:53,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:53,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503164422] [2022-12-13 17:45:53,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:53,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:53,670 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 45 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:53,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:53,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503164422] [2022-12-13 17:45:53,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503164422] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:53,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495124461] [2022-12-13 17:45:53,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:45:53,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:53,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:53,672 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:53,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-12-13 17:45:53,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-12-13 17:45:53,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:45:53,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 17:45:53,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:53,755 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:53,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:53,840 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:53,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495124461] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:53,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:53,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 16 [2022-12-13 17:45:53,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500529292] [2022-12-13 17:45:53,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:53,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 17:45:53,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:53,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 17:45:53,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-12-13 17:45:53,842 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:54,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:54,077 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2022-12-13 17:45:54,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 17:45:54,078 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 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 48 [2022-12-13 17:45:54,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:54,078 INFO L225 Difference]: With dead ends: 80 [2022-12-13 17:45:54,078 INFO L226 Difference]: Without dead ends: 78 [2022-12-13 17:45:54,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 83 SyntacticMatches, 20 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2022-12-13 17:45:54,079 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 50 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:54,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 182 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:54,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-12-13 17:45:54,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2022-12-13 17:45:54,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 71 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:54,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2022-12-13 17:45:54,183 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 48 [2022-12-13 17:45:54,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:54,183 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2022-12-13 17:45:54,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:54,183 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2022-12-13 17:45:54,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 17:45:54,183 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:54,183 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:54,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-12-13 17:45:54,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:54,385 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:54,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:54,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1574007517, now seen corresponding path program 19 times [2022-12-13 17:45:54,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:54,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422955596] [2022-12-13 17:45:54,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:54,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:54,629 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:54,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:54,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422955596] [2022-12-13 17:45:54,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422955596] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:54,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183658626] [2022-12-13 17:45:54,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:45:54,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:54,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:54,631 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:54,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-12-13 17:45:54,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:54,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 17:45:54,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:55,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:55,355 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:55,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183658626] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:55,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:55,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2022-12-13 17:45:55,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887895561] [2022-12-13 17:45:55,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:55,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-13 17:45:55,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:55,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-13 17:45:55,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=2229, Unknown=0, NotChecked=0, Total=2756 [2022-12-13 17:45:55,357 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:56,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:56,252 INFO L93 Difference]: Finished difference Result 155 states and 169 transitions. [2022-12-13 17:45:56,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 17:45:56,253 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 states have internal predecessors, (105), 0 states have call successors, (0), 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 51 [2022-12-13 17:45:56,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:56,253 INFO L225 Difference]: With dead ends: 155 [2022-12-13 17:45:56,253 INFO L226 Difference]: Without dead ends: 118 [2022-12-13 17:45:56,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 53 SyntacticMatches, 23 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2936 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1107, Invalid=4745, Unknown=0, NotChecked=0, Total=5852 [2022-12-13 17:45:56,254 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:56,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 188 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:56,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-12-13 17:45:56,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 73. [2022-12-13 17:45:56,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:56,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-12-13 17:45:56,371 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-12-13 17:45:56,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:56,371 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-12-13 17:45:56,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:56,371 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-12-13 17:45:56,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 17:45:56,372 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:56,372 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:56,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-12-13 17:45:56,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:56,573 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:56,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:56,574 INFO L85 PathProgramCache]: Analyzing trace with hash -2142136548, now seen corresponding path program 37 times [2022-12-13 17:45:56,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:56,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640144616] [2022-12-13 17:45:56,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:56,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 127 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:56,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:56,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640144616] [2022-12-13 17:45:56,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640144616] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:56,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468742088] [2022-12-13 17:45:56,880 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:45:56,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:56,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:56,881 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:56,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-12-13 17:45:56,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:56,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 17:45:56,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:57,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:57,664 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:57,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468742088] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:57,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:45:57,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 52 [2022-12-13 17:45:57,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351508519] [2022-12-13 17:45:57,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:57,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-12-13 17:45:57,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:45:57,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-12-13 17:45:57,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=2159, Unknown=0, NotChecked=0, Total=2652 [2022-12-13 17:45:57,665 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 52 states, 52 states have (on average 2.0) internal successors, (104), 52 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:58,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:45:58,674 INFO L93 Difference]: Finished difference Result 200 states and 215 transitions. [2022-12-13 17:45:58,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-13 17:45:58,674 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 52 states have internal predecessors, (104), 0 states have call successors, (0), 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 51 [2022-12-13 17:45:58,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:45:58,675 INFO L225 Difference]: With dead ends: 200 [2022-12-13 17:45:58,675 INFO L226 Difference]: Without dead ends: 163 [2022-12-13 17:45:58,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 54 SyntacticMatches, 23 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3388 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1310, Invalid=6000, Unknown=0, NotChecked=0, Total=7310 [2022-12-13 17:45:58,676 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 91 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:45:58,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 215 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:45:58,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-12-13 17:45:58,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 73. [2022-12-13 17:45:58,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:58,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-12-13 17:45:58,800 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-12-13 17:45:58,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:45:58,800 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-12-13 17:45:58,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 52 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:58,800 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-12-13 17:45:58,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 17:45:58,801 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:45:58,801 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:58,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-12-13 17:45:59,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:59,002 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:45:59,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:59,003 INFO L85 PathProgramCache]: Analyzing trace with hash 2032955133, now seen corresponding path program 38 times [2022-12-13 17:45:59,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:45:59,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829473285] [2022-12-13 17:45:59,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:59,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:45:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:59,317 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 127 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:59,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:45:59,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829473285] [2022-12-13 17:45:59,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829473285] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:45:59,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661876209] [2022-12-13 17:45:59,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:45:59,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:45:59,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:45:59,319 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:45:59,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-12-13 17:45:59,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:45:59,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:45:59,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 17:45:59,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:45:59,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:46:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:00,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661876209] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:46:00,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:46:00,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 51 [2022-12-13 17:46:00,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171233147] [2022-12-13 17:46:00,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:46:00,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-13 17:46:00,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:46:00,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-13 17:46:00,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=2087, Unknown=0, NotChecked=0, Total=2550 [2022-12-13 17:46:00,124 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:01,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:46:01,373 INFO L93 Difference]: Finished difference Result 244 states and 260 transitions. [2022-12-13 17:46:01,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-13 17:46:01,373 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-12-13 17:46:01,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:46:01,373 INFO L225 Difference]: With dead ends: 244 [2022-12-13 17:46:01,373 INFO L226 Difference]: Without dead ends: 207 [2022-12-13 17:46:01,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 55 SyntacticMatches, 23 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3777 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1505, Invalid=7051, Unknown=0, NotChecked=0, Total=8556 [2022-12-13 17:46:01,374 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 162 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:46:01,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 280 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:46:01,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-12-13 17:46:01,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 73. [2022-12-13 17:46:01,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:01,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-12-13 17:46:01,504 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-12-13 17:46:01,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:46:01,504 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-12-13 17:46:01,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:01,504 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-12-13 17:46:01,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 17:46:01,504 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:46:01,504 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:46:01,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-12-13 17:46:01,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:01,705 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:46:01,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:46:01,706 INFO L85 PathProgramCache]: Analyzing trace with hash 227972860, now seen corresponding path program 39 times [2022-12-13 17:46:01,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:46:01,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249788217] [2022-12-13 17:46:01,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:46:01,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:46:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:01,999 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 127 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:01,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:46:01,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249788217] [2022-12-13 17:46:01,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249788217] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:46:01,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064373602] [2022-12-13 17:46:01,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:46:01,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:02,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:46:02,000 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:46:02,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-12-13 17:46:02,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-13 17:46:02,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:46:02,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 17:46:02,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:46:02,406 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:02,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:46:02,580 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:02,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064373602] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:46:02,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:46:02,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 50 [2022-12-13 17:46:02,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086113018] [2022-12-13 17:46:02,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:46:02,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-13 17:46:02,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:46:02,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-13 17:46:02,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=2013, Unknown=0, NotChecked=0, Total=2450 [2022-12-13 17:46:02,581 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 50 states, 50 states have (on average 2.04) internal successors, (102), 50 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:03,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:46:03,747 INFO L93 Difference]: Finished difference Result 287 states and 304 transitions. [2022-12-13 17:46:03,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-13 17:46:03,748 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 50 states have internal predecessors, (102), 0 states have call successors, (0), 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 51 [2022-12-13 17:46:03,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:46:03,748 INFO L225 Difference]: With dead ends: 287 [2022-12-13 17:46:03,748 INFO L226 Difference]: Without dead ends: 250 [2022-12-13 17:46:03,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 56 SyntacticMatches, 23 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4065 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1659, Invalid=7847, Unknown=0, NotChecked=0, Total=9506 [2022-12-13 17:46:03,749 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 147 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:46:03,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 258 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:46:03,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-12-13 17:46:03,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 73. [2022-12-13 17:46:03,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:03,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-12-13 17:46:03,882 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-12-13 17:46:03,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:46:03,882 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-12-13 17:46:03,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 50 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:03,882 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-12-13 17:46:03,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 17:46:03,882 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:46:03,882 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:46:03,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-12-13 17:46:04,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-12-13 17:46:04,084 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:46:04,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:46:04,085 INFO L85 PathProgramCache]: Analyzing trace with hash -245894371, now seen corresponding path program 40 times [2022-12-13 17:46:04,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:46:04,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664414440] [2022-12-13 17:46:04,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:46:04,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:46:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:04,368 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 127 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:04,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:46:04,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664414440] [2022-12-13 17:46:04,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664414440] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:46:04,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351970471] [2022-12-13 17:46:04,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:46:04,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:04,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:46:04,370 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:46:04,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-12-13 17:46:04,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:46:04,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:46:04,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 17:46:04,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:46:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:04,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:46:04,935 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:04,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351970471] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:46:04,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:46:04,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 49 [2022-12-13 17:46:04,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774048482] [2022-12-13 17:46:04,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:46:04,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-13 17:46:04,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:46:04,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-13 17:46:04,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=1937, Unknown=0, NotChecked=0, Total=2352 [2022-12-13 17:46:04,936 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:06,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:46:06,242 INFO L93 Difference]: Finished difference Result 329 states and 347 transitions. [2022-12-13 17:46:06,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-12-13 17:46:06,242 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 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 51 [2022-12-13 17:46:06,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:46:06,244 INFO L225 Difference]: With dead ends: 329 [2022-12-13 17:46:06,244 INFO L226 Difference]: Without dead ends: 292 [2022-12-13 17:46:06,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 57 SyntacticMatches, 23 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4232 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1757, Invalid=8343, Unknown=0, NotChecked=0, Total=10100 [2022-12-13 17:46:06,244 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 194 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:46:06,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 302 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:46:06,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-12-13 17:46:06,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 73. [2022-12-13 17:46:06,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:06,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-12-13 17:46:06,380 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-12-13 17:46:06,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:46:06,380 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-12-13 17:46:06,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:06,381 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-12-13 17:46:06,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 17:46:06,381 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:46:06,381 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:46:06,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-12-13 17:46:06,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-12-13 17:46:06,582 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:46:06,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:46:06,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1646653732, now seen corresponding path program 41 times [2022-12-13 17:46:06,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:46:06,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534254073] [2022-12-13 17:46:06,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:46:06,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:46:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:06,862 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 127 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:06,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:46:06,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534254073] [2022-12-13 17:46:06,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534254073] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:46:06,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054810918] [2022-12-13 17:46:06,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:46:06,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:06,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:46:06,863 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:46:06,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-12-13 17:46:06,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-12-13 17:46:06,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:46:06,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 17:46:06,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:46:07,247 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 155 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:07,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:46:07,401 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 155 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:07,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054810918] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:46:07,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:46:07,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 48 [2022-12-13 17:46:07,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480646158] [2022-12-13 17:46:07,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:46:07,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-13 17:46:07,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:46:07,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-13 17:46:07,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1859, Unknown=0, NotChecked=0, Total=2256 [2022-12-13 17:46:07,402 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 48 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:08,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:46:08,931 INFO L93 Difference]: Finished difference Result 370 states and 389 transitions. [2022-12-13 17:46:08,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-12-13 17:46:08,931 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 48 states have internal predecessors, (100), 0 states have call successors, (0), 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 51 [2022-12-13 17:46:08,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:46:08,931 INFO L225 Difference]: With dead ends: 370 [2022-12-13 17:46:08,931 INFO L226 Difference]: Without dead ends: 333 [2022-12-13 17:46:08,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 58 SyntacticMatches, 23 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4258 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1790, Invalid=8512, Unknown=0, NotChecked=0, Total=10302 [2022-12-13 17:46:08,932 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 275 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:46:08,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 270 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:46:08,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-12-13 17:46:09,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 73. [2022-12-13 17:46:09,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:09,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-12-13 17:46:09,071 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-12-13 17:46:09,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:46:09,071 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-12-13 17:46:09,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 48 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:09,071 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-12-13 17:46:09,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 17:46:09,071 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:46:09,071 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:46:09,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-12-13 17:46:09,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:09,272 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:46:09,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:46:09,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1356201789, now seen corresponding path program 42 times [2022-12-13 17:46:09,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:46:09,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351151295] [2022-12-13 17:46:09,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:46:09,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:46:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:09,485 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 127 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:09,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:46:09,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351151295] [2022-12-13 17:46:09,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351151295] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:46:09,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665155006] [2022-12-13 17:46:09,485 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:46:09,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:09,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:46:09,486 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:46:09,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-12-13 17:46:09,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-12-13 17:46:09,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:46:09,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 17:46:09,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:46:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:09,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:46:10,089 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:10,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665155006] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:46:10,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:46:10,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 47 [2022-12-13 17:46:10,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327364130] [2022-12-13 17:46:10,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:46:10,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-13 17:46:10,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:46:10,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-13 17:46:10,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=1779, Unknown=0, NotChecked=0, Total=2162 [2022-12-13 17:46:10,090 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:11,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:46:11,779 INFO L93 Difference]: Finished difference Result 410 states and 430 transitions. [2022-12-13 17:46:11,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-12-13 17:46:11,779 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 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 51 [2022-12-13 17:46:11,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:46:11,780 INFO L225 Difference]: With dead ends: 410 [2022-12-13 17:46:11,780 INFO L226 Difference]: Without dead ends: 373 [2022-12-13 17:46:11,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 59 SyntacticMatches, 23 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4134 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1755, Invalid=8345, Unknown=0, NotChecked=0, Total=10100 [2022-12-13 17:46:11,781 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 249 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:46:11,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 238 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:46:11,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-12-13 17:46:11,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 73. [2022-12-13 17:46:11,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:11,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-12-13 17:46:11,924 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-12-13 17:46:11,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:46:11,924 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-12-13 17:46:11,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:11,925 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-12-13 17:46:11,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 17:46:11,925 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:46:11,925 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:46:11,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-12-13 17:46:12,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:12,126 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:46:12,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:46:12,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1314520764, now seen corresponding path program 43 times [2022-12-13 17:46:12,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:46:12,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809413846] [2022-12-13 17:46:12,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:46:12,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:46:12,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 127 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:12,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:46:12,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809413846] [2022-12-13 17:46:12,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809413846] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:46:12,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442102134] [2022-12-13 17:46:12,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:46:12,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:12,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:46:12,397 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:46:12,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-12-13 17:46:12,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:12,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 17:46:12,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:46:12,835 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:12,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:46:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:13,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442102134] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:46:13,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:46:13,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 46 [2022-12-13 17:46:13,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33501898] [2022-12-13 17:46:13,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:46:13,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-13 17:46:13,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:46:13,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-13 17:46:13,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1697, Unknown=0, NotChecked=0, Total=2070 [2022-12-13 17:46:13,017 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:15,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:46:15,070 INFO L93 Difference]: Finished difference Result 449 states and 470 transitions. [2022-12-13 17:46:15,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-12-13 17:46:15,070 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 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 51 [2022-12-13 17:46:15,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:46:15,071 INFO L225 Difference]: With dead ends: 449 [2022-12-13 17:46:15,071 INFO L226 Difference]: Without dead ends: 412 [2022-12-13 17:46:15,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 60 SyntacticMatches, 23 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3857 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1655, Invalid=7851, Unknown=0, NotChecked=0, Total=9506 [2022-12-13 17:46:15,071 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 373 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:46:15,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 281 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:46:15,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-12-13 17:46:15,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 73. [2022-12-13 17:46:15,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:15,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-12-13 17:46:15,217 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-12-13 17:46:15,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:46:15,217 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-12-13 17:46:15,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:15,217 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-12-13 17:46:15,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 17:46:15,217 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:46:15,217 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:46:15,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-12-13 17:46:15,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-12-13 17:46:15,419 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:46:15,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:46:15,420 INFO L85 PathProgramCache]: Analyzing trace with hash -626486435, now seen corresponding path program 44 times [2022-12-13 17:46:15,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:46:15,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050686363] [2022-12-13 17:46:15,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:46:15,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:46:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:15,680 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 127 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:15,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:46:15,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050686363] [2022-12-13 17:46:15,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050686363] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:46:15,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702415861] [2022-12-13 17:46:15,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:46:15,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:15,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:46:15,681 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:46:15,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-12-13 17:46:15,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:46:15,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:46:15,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 17:46:15,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:46:16,056 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:16,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:46:16,257 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:16,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702415861] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:46:16,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:46:16,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 45 [2022-12-13 17:46:16,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483079538] [2022-12-13 17:46:16,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:46:16,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-13 17:46:16,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:46:16,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-13 17:46:16,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1613, Unknown=0, NotChecked=0, Total=1980 [2022-12-13 17:46:16,259 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:18,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:46:18,383 INFO L93 Difference]: Finished difference Result 487 states and 509 transitions. [2022-12-13 17:46:18,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-12-13 17:46:18,383 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 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 51 [2022-12-13 17:46:18,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:46:18,384 INFO L225 Difference]: With dead ends: 487 [2022-12-13 17:46:18,384 INFO L226 Difference]: Without dead ends: 450 [2022-12-13 17:46:18,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 61 SyntacticMatches, 23 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3435 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1499, Invalid=7057, Unknown=0, NotChecked=0, Total=8556 [2022-12-13 17:46:18,385 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 354 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:46:18,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 323 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:46:18,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-12-13 17:46:18,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 73. [2022-12-13 17:46:18,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:18,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-12-13 17:46:18,535 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-12-13 17:46:18,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:46:18,535 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-12-13 17:46:18,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:18,536 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-12-13 17:46:18,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 17:46:18,536 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:46:18,536 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:46:18,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-12-13 17:46:18,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:18,737 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:46:18,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:46:18,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1943299740, now seen corresponding path program 45 times [2022-12-13 17:46:18,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:46:18,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663979450] [2022-12-13 17:46:18,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:46:18,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:46:18,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:19,029 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 127 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:19,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:46:19,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663979450] [2022-12-13 17:46:19,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663979450] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:46:19,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940659754] [2022-12-13 17:46:19,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:46:19,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:19,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:46:19,031 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:46:19,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-12-13 17:46:19,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-13 17:46:19,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:46:19,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 17:46:19,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:46:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:19,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:46:19,761 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:19,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940659754] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:46:19,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:46:19,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 44 [2022-12-13 17:46:19,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918575725] [2022-12-13 17:46:19,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:46:19,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-13 17:46:19,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:46:19,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-13 17:46:19,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1527, Unknown=0, NotChecked=0, Total=1892 [2022-12-13 17:46:19,763 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:21,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:46:21,704 INFO L93 Difference]: Finished difference Result 524 states and 547 transitions. [2022-12-13 17:46:21,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-13 17:46:21,704 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-12-13 17:46:21,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:46:21,705 INFO L225 Difference]: With dead ends: 524 [2022-12-13 17:46:21,705 INFO L226 Difference]: Without dead ends: 487 [2022-12-13 17:46:21,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 62 SyntacticMatches, 23 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2864 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1302, Invalid=6008, Unknown=0, NotChecked=0, Total=7310 [2022-12-13 17:46:21,705 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 423 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:46:21,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 287 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:46:21,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-12-13 17:46:21,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 73. [2022-12-13 17:46:21,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:21,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-12-13 17:46:21,859 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-12-13 17:46:21,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:46:21,859 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-12-13 17:46:21,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:21,859 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-12-13 17:46:21,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 17:46:21,859 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:46:21,859 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:46:21,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-12-13 17:46:22,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:22,061 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:46:22,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:46:22,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1437487235, now seen corresponding path program 10 times [2022-12-13 17:46:22,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:46:22,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988498682] [2022-12-13 17:46:22,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:46:22,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:46:22,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:22,282 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:22,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:46:22,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988498682] [2022-12-13 17:46:22,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988498682] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:46:22,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691595634] [2022-12-13 17:46:22,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:46:22,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:22,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:46:22,283 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:46:22,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-12-13 17:46:22,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:46:22,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:46:22,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 17:46:22,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:46:22,682 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:22,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:46:22,925 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:22,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691595634] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:46:22,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:46:22,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 43 [2022-12-13 17:46:22,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479781232] [2022-12-13 17:46:22,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:46:22,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-13 17:46:22,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:46:22,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-13 17:46:22,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1439, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 17:46:22,926 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:25,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:46:25,097 INFO L93 Difference]: Finished difference Result 563 states and 588 transitions. [2022-12-13 17:46:25,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-13 17:46:25,097 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-12-13 17:46:25,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:46:25,098 INFO L225 Difference]: With dead ends: 563 [2022-12-13 17:46:25,098 INFO L226 Difference]: Without dead ends: 526 [2022-12-13 17:46:25,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 63 SyntacticMatches, 23 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2229 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1097, Invalid=4755, Unknown=0, NotChecked=0, Total=5852 [2022-12-13 17:46:25,099 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 340 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:46:25,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 266 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:46:25,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-12-13 17:46:25,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 75. [2022-12-13 17:46:25,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1891891891891893) internal successors, (88), 74 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:25,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2022-12-13 17:46:25,280 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 51 [2022-12-13 17:46:25,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:46:25,280 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2022-12-13 17:46:25,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:25,281 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2022-12-13 17:46:25,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-13 17:46:25,281 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:46:25,281 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:46:25,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-12-13 17:46:25,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:25,482 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:46:25,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:46:25,483 INFO L85 PathProgramCache]: Analyzing trace with hash -723168425, now seen corresponding path program 20 times [2022-12-13 17:46:25,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:46:25,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809610199] [2022-12-13 17:46:25,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:46:25,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:46:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 55 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:25,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:46:25,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809610199] [2022-12-13 17:46:25,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809610199] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:46:25,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751787301] [2022-12-13 17:46:25,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:46:25,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:25,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:46:25,661 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:46:25,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-12-13 17:46:25,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:46:25,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:46:25,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 17:46:25,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:46:25,738 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:25,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:46:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:25,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751787301] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:46:25,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:46:25,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 17 [2022-12-13 17:46:25,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720389911] [2022-12-13 17:46:25,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:46:25,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 17:46:25,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:46:25,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 17:46:25,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2022-12-13 17:46:25,836 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:26,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:46:26,154 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2022-12-13 17:46:26,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 17:46:26,155 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 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 52 [2022-12-13 17:46:26,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:46:26,155 INFO L225 Difference]: With dead ends: 86 [2022-12-13 17:46:26,155 INFO L226 Difference]: Without dead ends: 84 [2022-12-13 17:46:26,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 90 SyntacticMatches, 22 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2022-12-13 17:46:26,155 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 74 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:46:26,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 168 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:46:26,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-13 17:46:26,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2022-12-13 17:46:26,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 77 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:26,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2022-12-13 17:46:26,317 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 52 [2022-12-13 17:46:26,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:46:26,317 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2022-12-13 17:46:26,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:26,318 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2022-12-13 17:46:26,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-13 17:46:26,318 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:46:26,318 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:46:26,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-12-13 17:46:26,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-12-13 17:46:26,519 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:46:26,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:46:26,520 INFO L85 PathProgramCache]: Analyzing trace with hash -349749319, now seen corresponding path program 21 times [2022-12-13 17:46:26,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:46:26,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955058970] [2022-12-13 17:46:26,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:46:26,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:46:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:26,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:46:26,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955058970] [2022-12-13 17:46:26,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955058970] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:46:26,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029590914] [2022-12-13 17:46:26,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:46:26,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:26,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:46:26,788 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:46:26,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-12-13 17:46:26,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-12-13 17:46:26,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:46:26,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 17:46:26,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:46:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:27,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:46:27,514 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:27,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029590914] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:46:27,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:46:27,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2022-12-13 17:46:27,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63701665] [2022-12-13 17:46:27,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:46:27,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-13 17:46:27,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:46:27,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-13 17:46:27,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=2583, Unknown=0, NotChecked=0, Total=3192 [2022-12-13 17:46:27,516 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:28,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:46:28,385 INFO L93 Difference]: Finished difference Result 168 states and 183 transitions. [2022-12-13 17:46:28,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 17:46:28,385 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 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 55 [2022-12-13 17:46:28,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:46:28,385 INFO L225 Difference]: With dead ends: 168 [2022-12-13 17:46:28,385 INFO L226 Difference]: Without dead ends: 128 [2022-12-13 17:46:28,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 57 SyntacticMatches, 25 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3462 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1276, Invalid=5530, Unknown=0, NotChecked=0, Total=6806 [2022-12-13 17:46:28,386 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 52 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:46:28,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 218 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:46:28,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-12-13 17:46:28,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 79. [2022-12-13 17:46:28,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:28,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-12-13 17:46:28,566 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-12-13 17:46:28,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:46:28,567 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-12-13 17:46:28,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:28,567 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-12-13 17:46:28,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-13 17:46:28,567 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:46:28,567 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:46:28,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-12-13 17:46:28,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-12-13 17:46:28,768 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:46:28,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:46:28,769 INFO L85 PathProgramCache]: Analyzing trace with hash -865260424, now seen corresponding path program 46 times [2022-12-13 17:46:28,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:46:28,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96864975] [2022-12-13 17:46:28,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:46:28,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:46:28,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:29,100 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 156 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:29,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:46:29,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96864975] [2022-12-13 17:46:29,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96864975] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:46:29,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916626581] [2022-12-13 17:46:29,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:46:29,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:29,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:46:29,102 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:46:29,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-12-13 17:46:29,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:46:29,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:46:29,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 17:46:29,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:46:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:29,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:46:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:29,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916626581] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:46:29,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:46:29,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 56 [2022-12-13 17:46:29,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010772116] [2022-12-13 17:46:29,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:46:29,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-12-13 17:46:29,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:46:29,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-12-13 17:46:29,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=2508, Unknown=0, NotChecked=0, Total=3080 [2022-12-13 17:46:29,867 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 56 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:30,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:46:30,892 INFO L93 Difference]: Finished difference Result 217 states and 233 transitions. [2022-12-13 17:46:30,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-13 17:46:30,892 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 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 55 [2022-12-13 17:46:30,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:46:30,893 INFO L225 Difference]: With dead ends: 217 [2022-12-13 17:46:30,893 INFO L226 Difference]: Without dead ends: 177 [2022-12-13 17:46:30,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 58 SyntacticMatches, 25 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4016 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1522, Invalid=7034, Unknown=0, NotChecked=0, Total=8556 [2022-12-13 17:46:30,893 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 102 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:46:30,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 227 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:46:30,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-12-13 17:46:31,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 79. [2022-12-13 17:46:31,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:31,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-12-13 17:46:31,084 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-12-13 17:46:31,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:46:31,084 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-12-13 17:46:31,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:31,084 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-12-13 17:46:31,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-13 17:46:31,084 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:46:31,085 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:46:31,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-12-13 17:46:31,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-12-13 17:46:31,286 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:46:31,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:46:31,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1436079143, now seen corresponding path program 47 times [2022-12-13 17:46:31,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:46:31,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198649101] [2022-12-13 17:46:31,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:46:31,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:46:31,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:31,591 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 156 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:31,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:46:31,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198649101] [2022-12-13 17:46:31,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198649101] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:46:31,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462763463] [2022-12-13 17:46:31,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:46:31,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:31,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:46:31,592 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:46:31,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-12-13 17:46:31,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-12-13 17:46:31,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:46:31,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 17:46:31,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:46:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:32,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:46:32,313 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:32,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462763463] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:46:32,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:46:32,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 55 [2022-12-13 17:46:32,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731233237] [2022-12-13 17:46:32,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:46:32,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-13 17:46:32,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:46:32,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-13 17:46:32,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=2431, Unknown=0, NotChecked=0, Total=2970 [2022-12-13 17:46:32,314 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:33,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:46:33,693 INFO L93 Difference]: Finished difference Result 265 states and 282 transitions. [2022-12-13 17:46:33,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-13 17:46:33,693 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 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 55 [2022-12-13 17:46:33,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:46:33,694 INFO L225 Difference]: With dead ends: 265 [2022-12-13 17:46:33,694 INFO L226 Difference]: Without dead ends: 225 [2022-12-13 17:46:33,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 59 SyntacticMatches, 25 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4512 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1765, Invalid=8335, Unknown=0, NotChecked=0, Total=10100 [2022-12-13 17:46:33,694 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 100 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:46:33,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 304 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:46:33,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-12-13 17:46:33,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 79. [2022-12-13 17:46:33,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:33,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-12-13 17:46:33,891 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-12-13 17:46:33,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:46:33,891 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-12-13 17:46:33,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:33,891 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-12-13 17:46:33,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-13 17:46:33,891 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:46:33,891 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:46:33,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-12-13 17:46:34,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-12-13 17:46:34,093 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:46:34,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:46:34,093 INFO L85 PathProgramCache]: Analyzing trace with hash 762264664, now seen corresponding path program 48 times [2022-12-13 17:46:34,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:46:34,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657993965] [2022-12-13 17:46:34,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:46:34,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:46:34,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:34,363 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 156 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:34,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:46:34,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657993965] [2022-12-13 17:46:34,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657993965] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:46:34,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932988354] [2022-12-13 17:46:34,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:46:34,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:34,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:46:34,364 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:46:34,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-12-13 17:46:34,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-12-13 17:46:34,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:46:34,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 17:46:34,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:46:34,822 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:34,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:46:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:35,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932988354] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:46:35,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:46:35,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 54 [2022-12-13 17:46:35,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717638395] [2022-12-13 17:46:35,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:46:35,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-13 17:46:35,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:46:35,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-13 17:46:35,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=2352, Unknown=0, NotChecked=0, Total=2862 [2022-12-13 17:46:35,014 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:36,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:46:36,865 INFO L93 Difference]: Finished difference Result 312 states and 330 transitions. [2022-12-13 17:46:36,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-12-13 17:46:36,866 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 0 states have call successors, (0), 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 55 [2022-12-13 17:46:36,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:46:36,866 INFO L225 Difference]: With dead ends: 312 [2022-12-13 17:46:36,866 INFO L226 Difference]: Without dead ends: 272 [2022-12-13 17:46:36,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 60 SyntacticMatches, 25 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4907 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1968, Invalid=9374, Unknown=0, NotChecked=0, Total=11342 [2022-12-13 17:46:36,867 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 144 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:46:36,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 286 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:46:36,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-12-13 17:46:37,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 79. [2022-12-13 17:46:37,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:37,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-12-13 17:46:37,068 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-12-13 17:46:37,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:46:37,068 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-12-13 17:46:37,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:37,068 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-12-13 17:46:37,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-13 17:46:37,069 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:46:37,069 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:46:37,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-12-13 17:46:37,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:37,270 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:46:37,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:46:37,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1525915641, now seen corresponding path program 49 times [2022-12-13 17:46:37,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:46:37,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787398446] [2022-12-13 17:46:37,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:46:37,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:46:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 156 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:37,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:46:37,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787398446] [2022-12-13 17:46:37,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787398446] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:46:37,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537940016] [2022-12-13 17:46:37,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:46:37,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:37,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:46:37,608 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:46:37,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-12-13 17:46:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:37,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 17:46:37,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:46:38,160 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:38,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:46:38,404 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:38,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537940016] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:46:38,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:46:38,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 53 [2022-12-13 17:46:38,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011183824] [2022-12-13 17:46:38,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:46:38,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-13 17:46:38,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:46:38,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-13 17:46:38,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=2271, Unknown=0, NotChecked=0, Total=2756 [2022-12-13 17:46:38,406 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:40,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:46:40,901 INFO L93 Difference]: Finished difference Result 358 states and 377 transitions. [2022-12-13 17:46:40,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-12-13 17:46:40,901 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 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 55 [2022-12-13 17:46:40,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:46:40,902 INFO L225 Difference]: With dead ends: 358 [2022-12-13 17:46:40,902 INFO L226 Difference]: Without dead ends: 318 [2022-12-13 17:46:40,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 61 SyntacticMatches, 25 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5176 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2113, Invalid=10097, Unknown=0, NotChecked=0, Total=12210 [2022-12-13 17:46:40,902 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 274 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:46:40,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 331 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:46:40,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-12-13 17:46:41,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 79. [2022-12-13 17:46:41,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:41,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-12-13 17:46:41,106 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-12-13 17:46:41,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:46:41,106 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-12-13 17:46:41,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:41,107 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-12-13 17:46:41,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-13 17:46:41,107 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:46:41,107 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:46:41,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-12-13 17:46:41,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:41,308 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:46:41,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:46:41,309 INFO L85 PathProgramCache]: Analyzing trace with hash 2104738872, now seen corresponding path program 50 times [2022-12-13 17:46:41,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:46:41,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187414580] [2022-12-13 17:46:41,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:46:41,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:46:41,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:41,599 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 156 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:41,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:46:41,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187414580] [2022-12-13 17:46:41,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187414580] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:46:41,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385177299] [2022-12-13 17:46:41,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:46:41,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:41,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:46:41,600 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:46:41,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-12-13 17:46:41,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:46:41,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:46:41,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 17:46:41,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:46:42,050 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:42,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:46:42,300 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:42,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385177299] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:46:42,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:46:42,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 52 [2022-12-13 17:46:42,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637077662] [2022-12-13 17:46:42,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:46:42,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-12-13 17:46:42,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:46:42,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-12-13 17:46:42,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=2188, Unknown=0, NotChecked=0, Total=2652 [2022-12-13 17:46:42,302 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 52 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:44,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:46:44,475 INFO L93 Difference]: Finished difference Result 403 states and 423 transitions. [2022-12-13 17:46:44,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-12-13 17:46:44,475 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 52 states have internal predecessors, (108), 0 states have call successors, (0), 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 55 [2022-12-13 17:46:44,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:46:44,475 INFO L225 Difference]: With dead ends: 403 [2022-12-13 17:46:44,475 INFO L226 Difference]: Without dead ends: 363 [2022-12-13 17:46:44,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 62 SyntacticMatches, 25 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5293 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2188, Invalid=10468, Unknown=0, NotChecked=0, Total=12656 [2022-12-13 17:46:44,476 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 237 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:46:44,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 300 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:46:44,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-12-13 17:46:44,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 79. [2022-12-13 17:46:44,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:44,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-12-13 17:46:44,688 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-12-13 17:46:44,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:46:44,688 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-12-13 17:46:44,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 52 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:44,688 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-12-13 17:46:44,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-13 17:46:44,688 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:46:44,688 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:46:44,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-12-13 17:46:44,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:44,889 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:46:44,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:46:44,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1984863257, now seen corresponding path program 51 times [2022-12-13 17:46:44,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:46:44,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568662582] [2022-12-13 17:46:44,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:46:44,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:46:44,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:45,201 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 156 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:45,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:46:45,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568662582] [2022-12-13 17:46:45,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568662582] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:46:45,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095393791] [2022-12-13 17:46:45,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:46:45,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:45,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:46:45,202 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:46:45,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-12-13 17:46:45,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-12-13 17:46:45,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:46:45,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 17:46:45,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:46:45,611 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:45,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:46:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:45,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095393791] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:46:45,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:46:45,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 51 [2022-12-13 17:46:45,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367618265] [2022-12-13 17:46:45,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:46:45,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-13 17:46:45,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:46:45,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-13 17:46:45,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=2103, Unknown=0, NotChecked=0, Total=2550 [2022-12-13 17:46:45,800 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:48,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:46:48,329 INFO L93 Difference]: Finished difference Result 447 states and 468 transitions. [2022-12-13 17:46:48,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-12-13 17:46:48,330 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 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 55 [2022-12-13 17:46:48,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:46:48,330 INFO L225 Difference]: With dead ends: 447 [2022-12-13 17:46:48,330 INFO L226 Difference]: Without dead ends: 407 [2022-12-13 17:46:48,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 63 SyntacticMatches, 25 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5244 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2187, Invalid=10469, Unknown=0, NotChecked=0, Total=12656 [2022-12-13 17:46:48,333 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 268 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:46:48,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 324 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:46:48,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-12-13 17:46:48,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 79. [2022-12-13 17:46:48,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:48,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-12-13 17:46:48,544 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-12-13 17:46:48,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:46:48,544 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-12-13 17:46:48,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:48,544 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-12-13 17:46:48,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-13 17:46:48,545 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:46:48,545 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:46:48,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-12-13 17:46:48,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:48,746 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:46:48,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:46:48,747 INFO L85 PathProgramCache]: Analyzing trace with hash 179880984, now seen corresponding path program 52 times [2022-12-13 17:46:48,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:46:48,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420235021] [2022-12-13 17:46:48,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:46:48,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:46:48,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 156 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:49,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:46:49,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420235021] [2022-12-13 17:46:49,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420235021] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:46:49,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921653629] [2022-12-13 17:46:49,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:46:49,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:49,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:46:49,017 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:46:49,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-12-13 17:46:49,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:46:49,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:46:49,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 17:46:49,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:46:49,403 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:49,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:46:49,609 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:49,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921653629] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:46:49,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:46:49,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 50 [2022-12-13 17:46:49,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768024091] [2022-12-13 17:46:49,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:46:49,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-13 17:46:49,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:46:49,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-13 17:46:49,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=2016, Unknown=0, NotChecked=0, Total=2450 [2022-12-13 17:46:49,611 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 50 states, 50 states have (on average 2.12) internal successors, (106), 50 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:52,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:46:52,379 INFO L93 Difference]: Finished difference Result 490 states and 512 transitions. [2022-12-13 17:46:52,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-12-13 17:46:52,379 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 50 states have internal predecessors, (106), 0 states have call successors, (0), 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 55 [2022-12-13 17:46:52,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:46:52,380 INFO L225 Difference]: With dead ends: 490 [2022-12-13 17:46:52,380 INFO L226 Difference]: Without dead ends: 450 [2022-12-13 17:46:52,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 64 SyntacticMatches, 25 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5023 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2110, Invalid=10100, Unknown=0, NotChecked=0, Total=12210 [2022-12-13 17:46:52,381 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 303 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:46:52,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 290 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:46:52,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-12-13 17:46:52,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 79. [2022-12-13 17:46:52,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:52,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-12-13 17:46:52,601 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-12-13 17:46:52,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:46:52,602 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-12-13 17:46:52,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 50 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:52,602 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-12-13 17:46:52,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-13 17:46:52,602 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:46:52,602 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:46:52,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-12-13 17:46:52,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:52,803 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:46:52,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:46:52,804 INFO L85 PathProgramCache]: Analyzing trace with hash -293986247, now seen corresponding path program 53 times [2022-12-13 17:46:52,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:46:52,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393285782] [2022-12-13 17:46:52,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:46:52,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:46:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:53,031 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 156 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:53,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:46:53,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393285782] [2022-12-13 17:46:53,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393285782] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:46:53,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395822959] [2022-12-13 17:46:53,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:46:53,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:53,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:46:53,033 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:46:53,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-12-13 17:46:53,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-12-13 17:46:53,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:46:53,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 17:46:53,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:46:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:53,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:46:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:53,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395822959] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:46:53,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:46:53,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 49 [2022-12-13 17:46:53,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551691749] [2022-12-13 17:46:53,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:46:53,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-13 17:46:53,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:46:53,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-13 17:46:53,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1927, Unknown=0, NotChecked=0, Total=2352 [2022-12-13 17:46:53,608 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:56,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:46:56,145 INFO L93 Difference]: Finished difference Result 532 states and 555 transitions. [2022-12-13 17:46:56,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-12-13 17:46:56,145 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 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 55 [2022-12-13 17:46:56,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:46:56,146 INFO L225 Difference]: With dead ends: 532 [2022-12-13 17:46:56,146 INFO L226 Difference]: Without dead ends: 492 [2022-12-13 17:46:56,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 65 SyntacticMatches, 25 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4632 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1963, Invalid=9379, Unknown=0, NotChecked=0, Total=11342 [2022-12-13 17:46:56,147 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 326 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:46:56,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 290 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:46:56,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-12-13 17:46:56,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 79. [2022-12-13 17:46:56,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:56,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-12-13 17:46:56,366 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-12-13 17:46:56,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:46:56,366 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-12-13 17:46:56,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:56,366 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-12-13 17:46:56,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-13 17:46:56,367 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:46:56,367 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:46:56,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-12-13 17:46:56,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2022-12-13 17:46:56,568 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:46:56,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:46:56,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1694745608, now seen corresponding path program 54 times [2022-12-13 17:46:56,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:46:56,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512944426] [2022-12-13 17:46:56,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:46:56,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:46:56,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:56,874 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 156 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:56,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:46:56,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512944426] [2022-12-13 17:46:56,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512944426] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:46:56,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561662387] [2022-12-13 17:46:56,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:46:56,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:46:56,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:46:56,875 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:46:56,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-12-13 17:46:56,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-12-13 17:46:56,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:46:56,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 17:46:56,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:46:57,265 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:57,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:46:57,450 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:46:57,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561662387] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:46:57,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:46:57,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 48 [2022-12-13 17:46:57,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984397780] [2022-12-13 17:46:57,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:46:57,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-13 17:46:57,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:46:57,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-13 17:46:57,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=1836, Unknown=0, NotChecked=0, Total=2256 [2022-12-13 17:46:57,451 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:00,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:47:00,016 INFO L93 Difference]: Finished difference Result 573 states and 597 transitions. [2022-12-13 17:47:00,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-12-13 17:47:00,016 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 states have internal predecessors, (104), 0 states have call successors, (0), 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 55 [2022-12-13 17:47:00,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:47:00,017 INFO L225 Difference]: With dead ends: 573 [2022-12-13 17:47:00,017 INFO L226 Difference]: Without dead ends: 533 [2022-12-13 17:47:00,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 66 SyntacticMatches, 25 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4085 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1758, Invalid=8342, Unknown=0, NotChecked=0, Total=10100 [2022-12-13 17:47:00,017 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 376 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:47:00,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 330 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:47:00,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-12-13 17:47:00,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 79. [2022-12-13 17:47:00,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:00,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-12-13 17:47:00,241 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-12-13 17:47:00,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:47:00,241 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-12-13 17:47:00,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:00,241 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-12-13 17:47:00,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-13 17:47:00,241 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:47:00,241 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:47:00,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-12-13 17:47:00,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-12-13 17:47:00,442 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:47:00,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:47:00,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1308109913, now seen corresponding path program 55 times [2022-12-13 17:47:00,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:47:00,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668592362] [2022-12-13 17:47:00,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:47:00,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:47:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:47:00,684 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 156 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:00,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:47:00,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668592362] [2022-12-13 17:47:00,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668592362] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:47:00,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116555206] [2022-12-13 17:47:00,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:47:00,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:00,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:47:00,685 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:47:00,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-12-13 17:47:00,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:47:00,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 17:47:00,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:47:01,124 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:01,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:47:01,362 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:01,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116555206] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:47:01,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:47:01,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 47 [2022-12-13 17:47:01,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834067599] [2022-12-13 17:47:01,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:47:01,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-13 17:47:01,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:47:01,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-13 17:47:01,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1743, Unknown=0, NotChecked=0, Total=2162 [2022-12-13 17:47:01,363 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 47 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:04,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:47:04,060 INFO L93 Difference]: Finished difference Result 613 states and 638 transitions. [2022-12-13 17:47:04,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-12-13 17:47:04,060 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 47 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-12-13 17:47:04,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:47:04,061 INFO L225 Difference]: With dead ends: 613 [2022-12-13 17:47:04,061 INFO L226 Difference]: Without dead ends: 573 [2022-12-13 17:47:04,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 67 SyntacticMatches, 25 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3382 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1513, Invalid=7043, Unknown=0, NotChecked=0, Total=8556 [2022-12-13 17:47:04,062 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 336 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:47:04,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 310 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:47:04,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-12-13 17:47:04,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 79. [2022-12-13 17:47:04,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:04,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-12-13 17:47:04,298 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-12-13 17:47:04,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:47:04,298 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-12-13 17:47:04,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 47 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:04,299 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-12-13 17:47:04,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-13 17:47:04,299 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:47:04,299 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:47:04,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-12-13 17:47:04,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:04,500 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:47:04,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:47:04,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1266428888, now seen corresponding path program 11 times [2022-12-13 17:47:04,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:47:04,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775336840] [2022-12-13 17:47:04,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:47:04,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:47:04,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:47:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:04,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:47:04,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775336840] [2022-12-13 17:47:04,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775336840] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:47:04,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727918876] [2022-12-13 17:47:04,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:47:04,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:04,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:47:04,779 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:47:04,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-12-13 17:47:04,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-12-13 17:47:04,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:47:04,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 17:47:04,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:47:05,142 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:05,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:47:05,337 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:05,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727918876] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:47:05,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:47:05,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 46 [2022-12-13 17:47:05,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716585147] [2022-12-13 17:47:05,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:47:05,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-13 17:47:05,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:47:05,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-13 17:47:05,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=1648, Unknown=0, NotChecked=0, Total=2070 [2022-12-13 17:47:05,339 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:08,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:47:08,312 INFO L93 Difference]: Finished difference Result 655 states and 682 transitions. [2022-12-13 17:47:08,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-13 17:47:08,313 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 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 55 [2022-12-13 17:47:08,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:47:08,314 INFO L225 Difference]: With dead ends: 655 [2022-12-13 17:47:08,314 INFO L226 Difference]: Without dead ends: 615 [2022-12-13 17:47:08,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 68 SyntacticMatches, 25 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2618 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1265, Invalid=5541, Unknown=0, NotChecked=0, Total=6806 [2022-12-13 17:47:08,314 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 382 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:47:08,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 247 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:47:08,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-12-13 17:47:08,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 81. [2022-12-13 17:47:08,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1875) internal successors, (95), 80 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:08,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2022-12-13 17:47:08,550 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 55 [2022-12-13 17:47:08,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:47:08,550 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2022-12-13 17:47:08,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:08,550 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2022-12-13 17:47:08,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-13 17:47:08,550 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:47:08,550 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:47:08,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-12-13 17:47:08,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:08,751 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:47:08,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:47:08,752 INFO L85 PathProgramCache]: Analyzing trace with hash -66956493, now seen corresponding path program 22 times [2022-12-13 17:47:08,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:47:08,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638320589] [2022-12-13 17:47:08,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:47:08,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:47:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:47:08,921 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 66 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:08,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:47:08,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638320589] [2022-12-13 17:47:08,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638320589] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:47:08,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325170198] [2022-12-13 17:47:08,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:47:08,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:08,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:47:08,922 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:47:08,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-12-13 17:47:08,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:47:08,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:47:08,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 17:47:08,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:47:09,020 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:09,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:47:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:09,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325170198] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:47:09,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:47:09,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 18 [2022-12-13 17:47:09,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470777060] [2022-12-13 17:47:09,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:47:09,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 17:47:09,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:47:09,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 17:47:09,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2022-12-13 17:47:09,156 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:09,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:47:09,588 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2022-12-13 17:47:09,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 17:47:09,588 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 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 56 [2022-12-13 17:47:09,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:47:09,588 INFO L225 Difference]: With dead ends: 92 [2022-12-13 17:47:09,589 INFO L226 Difference]: Without dead ends: 90 [2022-12-13 17:47:09,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 97 SyntacticMatches, 24 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=641, Unknown=0, NotChecked=0, Total=992 [2022-12-13 17:47:09,589 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 82 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:47:09,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 174 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:47:09,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-12-13 17:47:09,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2022-12-13 17:47:09,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.180722891566265) internal successors, (98), 83 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:09,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2022-12-13 17:47:09,828 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 56 [2022-12-13 17:47:09,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:47:09,828 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2022-12-13 17:47:09,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:09,828 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2022-12-13 17:47:09,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-13 17:47:09,828 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:47:09,828 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:47:09,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-12-13 17:47:10,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:10,029 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:47:10,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:47:10,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1831214499, now seen corresponding path program 23 times [2022-12-13 17:47:10,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:47:10,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160361258] [2022-12-13 17:47:10,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:47:10,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:47:10,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:47:10,332 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:10,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:47:10,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160361258] [2022-12-13 17:47:10,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160361258] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:47:10,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854135712] [2022-12-13 17:47:10,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:47:10,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:10,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:47:10,333 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:47:10,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-12-13 17:47:10,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-12-13 17:47:10,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:47:10,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 17:47:10,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:47:11,068 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:11,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:47:11,397 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:11,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854135712] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:47:11,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:47:11,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2022-12-13 17:47:11,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208042322] [2022-12-13 17:47:11,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:47:11,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-12-13 17:47:11,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:47:11,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-12-13 17:47:11,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=697, Invalid=2963, Unknown=0, NotChecked=0, Total=3660 [2022-12-13 17:47:11,399 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 61 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:12,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:47:12,937 INFO L93 Difference]: Finished difference Result 181 states and 197 transitions. [2022-12-13 17:47:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 17:47:12,938 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 61 states have internal predecessors, (121), 0 states have call successors, (0), 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 59 [2022-12-13 17:47:12,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:47:12,938 INFO L225 Difference]: With dead ends: 181 [2022-12-13 17:47:12,938 INFO L226 Difference]: Without dead ends: 138 [2022-12-13 17:47:12,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 61 SyntacticMatches, 27 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4031 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1457, Invalid=6375, Unknown=0, NotChecked=0, Total=7832 [2022-12-13 17:47:12,939 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 73 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:47:12,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 217 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:47:12,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-12-13 17:47:13,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 85. [2022-12-13 17:47:13,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:13,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-12-13 17:47:13,201 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-12-13 17:47:13,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:47:13,201 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-12-13 17:47:13,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 61 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:13,201 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-12-13 17:47:13,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-13 17:47:13,201 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:47:13,201 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:47:13,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-12-13 17:47:13,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:13,403 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:47:13,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:47:13,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1372411804, now seen corresponding path program 56 times [2022-12-13 17:47:13,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:47:13,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740982279] [2022-12-13 17:47:13,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:47:13,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:47:13,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:47:13,775 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 188 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:13,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:47:13,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740982279] [2022-12-13 17:47:13,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740982279] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:47:13,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121372674] [2022-12-13 17:47:13,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:47:13,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:13,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:47:13,776 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:47:13,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-12-13 17:47:13,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:47:13,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:47:13,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 17:47:13,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:47:14,327 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:14,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:47:14,568 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:14,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121372674] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:47:14,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:47:14,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 60 [2022-12-13 17:47:14,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177364406] [2022-12-13 17:47:14,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:47:14,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-12-13 17:47:14,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:47:14,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-12-13 17:47:14,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=657, Invalid=2883, Unknown=0, NotChecked=0, Total=3540 [2022-12-13 17:47:14,570 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 60 states, 60 states have (on average 2.0) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:16,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:47:16,176 INFO L93 Difference]: Finished difference Result 234 states and 251 transitions. [2022-12-13 17:47:16,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-13 17:47:16,176 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 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 59 [2022-12-13 17:47:16,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:47:16,177 INFO L225 Difference]: With dead ends: 234 [2022-12-13 17:47:16,177 INFO L226 Difference]: Without dead ends: 191 [2022-12-13 17:47:16,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 62 SyntacticMatches, 27 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4697 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1750, Invalid=8150, Unknown=0, NotChecked=0, Total=9900 [2022-12-13 17:47:16,177 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 75 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:47:16,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 255 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:47:16,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-12-13 17:47:16,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 85. [2022-12-13 17:47:16,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:16,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-12-13 17:47:16,452 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-12-13 17:47:16,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:47:16,452 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-12-13 17:47:16,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:16,452 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-12-13 17:47:16,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-13 17:47:16,452 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:47:16,452 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:47:16,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-12-13 17:47:16,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:16,653 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:47:16,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:47:16,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1710834051, now seen corresponding path program 57 times [2022-12-13 17:47:16,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:47:16,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513311622] [2022-12-13 17:47:16,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:47:16,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:47:16,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:47:17,029 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 188 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:17,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:47:17,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513311622] [2022-12-13 17:47:17,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513311622] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:47:17,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628972406] [2022-12-13 17:47:17,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:47:17,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:17,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:47:17,030 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:47:17,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-12-13 17:47:17,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-12-13 17:47:17,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:47:17,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 17:47:17,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:47:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:17,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:47:17,942 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:17,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628972406] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:47:17,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:47:17,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 59 [2022-12-13 17:47:17,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027047225] [2022-12-13 17:47:17,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:47:17,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-12-13 17:47:17,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:47:17,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-12-13 17:47:17,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=2801, Unknown=0, NotChecked=0, Total=3422 [2022-12-13 17:47:17,944 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:20,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:47:20,387 INFO L93 Difference]: Finished difference Result 286 states and 304 transitions. [2022-12-13 17:47:20,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-13 17:47:20,387 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 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 59 [2022-12-13 17:47:20,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:47:20,388 INFO L225 Difference]: With dead ends: 286 [2022-12-13 17:47:20,388 INFO L226 Difference]: Without dead ends: 243 [2022-12-13 17:47:20,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 63 SyntacticMatches, 27 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5312 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2046, Invalid=9726, Unknown=0, NotChecked=0, Total=11772 [2022-12-13 17:47:20,388 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 145 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:47:20,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 238 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:47:20,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-12-13 17:47:20,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 85. [2022-12-13 17:47:20,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:20,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-12-13 17:47:20,672 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-12-13 17:47:20,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:47:20,672 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-12-13 17:47:20,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:20,672 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-12-13 17:47:20,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-13 17:47:20,672 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:47:20,672 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:47:20,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-12-13 17:47:20,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:20,874 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:47:20,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:47:20,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1099200380, now seen corresponding path program 58 times [2022-12-13 17:47:20,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:47:20,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861261985] [2022-12-13 17:47:20,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:47:20,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:47:20,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:47:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 188 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:21,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:47:21,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861261985] [2022-12-13 17:47:21,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861261985] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:47:21,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092036849] [2022-12-13 17:47:21,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:47:21,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:21,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:47:21,182 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:47:21,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-12-13 17:47:21,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:47:21,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:47:21,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 17:47:21,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:47:21,731 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:21,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:47:21,987 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:21,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092036849] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:47:21,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:47:21,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 58 [2022-12-13 17:47:21,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20275101] [2022-12-13 17:47:21,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:47:21,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-12-13 17:47:21,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:47:21,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-12-13 17:47:21,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=589, Invalid=2717, Unknown=0, NotChecked=0, Total=3306 [2022-12-13 17:47:21,989 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:24,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:47:24,842 INFO L93 Difference]: Finished difference Result 337 states and 356 transitions. [2022-12-13 17:47:24,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-12-13 17:47:24,842 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 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 59 [2022-12-13 17:47:24,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:47:24,843 INFO L225 Difference]: With dead ends: 337 [2022-12-13 17:47:24,843 INFO L226 Difference]: Without dead ends: 294 [2022-12-13 17:47:24,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 64 SyntacticMatches, 27 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5828 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2304, Invalid=11036, Unknown=0, NotChecked=0, Total=13340 [2022-12-13 17:47:24,844 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 189 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:47:24,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 236 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:47:24,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-12-13 17:47:25,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 85. [2022-12-13 17:47:25,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:25,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-12-13 17:47:25,133 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-12-13 17:47:25,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:47:25,133 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-12-13 17:47:25,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:25,133 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-12-13 17:47:25,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-13 17:47:25,133 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:47:25,134 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:47:25,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-12-13 17:47:25,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:25,335 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:47:25,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:47:25,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1996741987, now seen corresponding path program 59 times [2022-12-13 17:47:25,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:47:25,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492392332] [2022-12-13 17:47:25,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:47:25,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:47:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:47:25,660 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 188 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:25,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:47:25,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492392332] [2022-12-13 17:47:25,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492392332] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:47:25,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857659909] [2022-12-13 17:47:25,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:47:25,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:25,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:47:25,662 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:47:25,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-12-13 17:47:25,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-12-13 17:47:25,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:47:25,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 17:47:25,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:47:26,199 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:26,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:47:26,449 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:26,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857659909] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:47:26,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:47:26,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 57 [2022-12-13 17:47:26,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790987102] [2022-12-13 17:47:26,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:47:26,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-13 17:47:26,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:47:26,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-13 17:47:26,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=2631, Unknown=0, NotChecked=0, Total=3192 [2022-12-13 17:47:26,451 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:29,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:47:29,391 INFO L93 Difference]: Finished difference Result 387 states and 407 transitions. [2022-12-13 17:47:29,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-12-13 17:47:29,391 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 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 59 [2022-12-13 17:47:29,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:47:29,392 INFO L225 Difference]: With dead ends: 387 [2022-12-13 17:47:29,392 INFO L226 Difference]: Without dead ends: 344 [2022-12-13 17:47:29,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 65 SyntacticMatches, 27 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2503, Invalid=12017, Unknown=0, NotChecked=0, Total=14520 [2022-12-13 17:47:29,393 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 332 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:47:29,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 262 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:47:29,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-12-13 17:47:29,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 85. [2022-12-13 17:47:29,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:29,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-12-13 17:47:29,694 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-12-13 17:47:29,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:47:29,694 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-12-13 17:47:29,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:29,694 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-12-13 17:47:29,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-13 17:47:29,695 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:47:29,695 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:47:29,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-12-13 17:47:29,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:29,896 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:47:29,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:47:29,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1782714204, now seen corresponding path program 60 times [2022-12-13 17:47:29,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:47:29,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682546655] [2022-12-13 17:47:29,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:47:29,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:47:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:47:30,196 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 188 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:30,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:47:30,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682546655] [2022-12-13 17:47:30,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682546655] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:47:30,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998894681] [2022-12-13 17:47:30,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:47:30,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:30,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:47:30,197 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:47:30,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-12-13 17:47:30,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-12-13 17:47:30,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:47:30,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 17:47:30,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:47:30,751 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:30,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:47:31,031 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:31,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998894681] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:47:31,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:47:31,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 56 [2022-12-13 17:47:31,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983065540] [2022-12-13 17:47:31,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:47:31,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-12-13 17:47:31,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:47:31,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-12-13 17:47:31,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=2543, Unknown=0, NotChecked=0, Total=3080 [2022-12-13 17:47:31,033 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:34,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:47:34,605 INFO L93 Difference]: Finished difference Result 436 states and 457 transitions. [2022-12-13 17:47:34,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-12-13 17:47:34,605 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-12-13 17:47:34,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:47:34,606 INFO L225 Difference]: With dead ends: 436 [2022-12-13 17:47:34,606 INFO L226 Difference]: Without dead ends: 393 [2022-12-13 17:47:34,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 66 SyntacticMatches, 27 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6441 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2628, Invalid=12624, Unknown=0, NotChecked=0, Total=15252 [2022-12-13 17:47:34,607 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 283 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:47:34,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 329 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:47:34,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-12-13 17:47:34,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 85. [2022-12-13 17:47:34,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:34,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-12-13 17:47:34,911 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-12-13 17:47:34,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:47:34,912 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-12-13 17:47:34,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:34,912 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-12-13 17:47:34,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-13 17:47:34,912 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:47:34,912 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:47:34,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-12-13 17:47:35,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-12-13 17:47:35,113 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:47:35,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:47:35,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1211895485, now seen corresponding path program 61 times [2022-12-13 17:47:35,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:47:35,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542418273] [2022-12-13 17:47:35,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:47:35,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:47:35,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:47:35,387 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 188 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:35,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:47:35,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542418273] [2022-12-13 17:47:35,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542418273] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:47:35,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962692987] [2022-12-13 17:47:35,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:47:35,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:35,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:47:35,388 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:47:35,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-12-13 17:47:35,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:47:35,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 17:47:35,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:47:35,857 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 222 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:35,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:47:36,065 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 222 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:36,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962692987] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:47:36,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:47:36,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 55 [2022-12-13 17:47:36,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96395353] [2022-12-13 17:47:36,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:47:36,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-13 17:47:36,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:47:36,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-13 17:47:36,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2453, Unknown=0, NotChecked=0, Total=2970 [2022-12-13 17:47:36,066 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:39,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:47:39,561 INFO L93 Difference]: Finished difference Result 484 states and 506 transitions. [2022-12-13 17:47:39,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-12-13 17:47:39,562 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-12-13 17:47:39,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:47:39,562 INFO L225 Difference]: With dead ends: 484 [2022-12-13 17:47:39,562 INFO L226 Difference]: Without dead ends: 441 [2022-12-13 17:47:39,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 67 SyntacticMatches, 27 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6486 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2670, Invalid=12830, Unknown=0, NotChecked=0, Total=15500 [2022-12-13 17:47:39,563 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 331 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:47:39,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 262 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:47:39,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-12-13 17:47:39,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 85. [2022-12-13 17:47:39,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:39,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-12-13 17:47:39,868 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-12-13 17:47:39,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:47:39,868 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-12-13 17:47:39,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:39,869 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-12-13 17:47:39,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-13 17:47:39,869 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:47:39,869 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:47:39,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-12-13 17:47:40,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:40,070 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:47:40,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:47:40,071 INFO L85 PathProgramCache]: Analyzing trace with hash -884728004, now seen corresponding path program 62 times [2022-12-13 17:47:40,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:47:40,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115262434] [2022-12-13 17:47:40,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:47:40,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:47:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:47:40,328 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 188 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:40,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:47:40,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115262434] [2022-12-13 17:47:40,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115262434] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:47:40,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402595537] [2022-12-13 17:47:40,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:47:40,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:40,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:47:40,329 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:47:40,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-12-13 17:47:40,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:47:40,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:47:40,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 17:47:40,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:47:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:40,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:47:41,089 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:41,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402595537] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:47:41,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:47:41,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 54 [2022-12-13 17:47:41,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251370350] [2022-12-13 17:47:41,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:47:41,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-13 17:47:41,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:47:41,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-13 17:47:41,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=2361, Unknown=0, NotChecked=0, Total=2862 [2022-12-13 17:47:41,090 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 54 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:44,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:47:44,450 INFO L93 Difference]: Finished difference Result 531 states and 554 transitions. [2022-12-13 17:47:44,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-12-13 17:47:44,451 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 54 states have internal predecessors, (114), 0 states have call successors, (0), 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 59 [2022-12-13 17:47:44,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:47:44,451 INFO L225 Difference]: With dead ends: 531 [2022-12-13 17:47:44,451 INFO L226 Difference]: Without dead ends: 488 [2022-12-13 17:47:44,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 68 SyntacticMatches, 27 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6341 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2626, Invalid=12626, Unknown=0, NotChecked=0, Total=15252 [2022-12-13 17:47:44,452 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 317 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:47:44,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 313 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:47:44,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-12-13 17:47:44,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 85. [2022-12-13 17:47:44,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:44,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-12-13 17:47:44,764 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-12-13 17:47:44,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:47:44,764 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-12-13 17:47:44,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 54 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:44,764 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-12-13 17:47:44,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-13 17:47:44,764 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:47:44,764 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:47:44,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-12-13 17:47:44,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:44,965 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:47:44,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:47:44,966 INFO L85 PathProgramCache]: Analyzing trace with hash -121077027, now seen corresponding path program 63 times [2022-12-13 17:47:44,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:47:44,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129915331] [2022-12-13 17:47:44,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:47:44,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:47:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:47:45,234 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 188 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:45,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:47:45,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129915331] [2022-12-13 17:47:45,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129915331] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:47:45,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976122483] [2022-12-13 17:47:45,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:47:45,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:45,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:47:45,235 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:47:45,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-12-13 17:47:45,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-12-13 17:47:45,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:47:45,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 17:47:45,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:47:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:45,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:47:45,945 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:45,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976122483] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:47:45,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:47:45,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 53 [2022-12-13 17:47:45,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086296872] [2022-12-13 17:47:45,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:47:45,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-13 17:47:45,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:47:45,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-13 17:47:45,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=2267, Unknown=0, NotChecked=0, Total=2756 [2022-12-13 17:47:45,946 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:49,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:47:49,853 INFO L93 Difference]: Finished difference Result 577 states and 601 transitions. [2022-12-13 17:47:49,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-12-13 17:47:49,853 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 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 59 [2022-12-13 17:47:49,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:47:49,854 INFO L225 Difference]: With dead ends: 577 [2022-12-13 17:47:49,854 INFO L226 Difference]: Without dead ends: 534 [2022-12-13 17:47:49,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 69 SyntacticMatches, 27 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6003 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2499, Invalid=12021, Unknown=0, NotChecked=0, Total=14520 [2022-12-13 17:47:49,855 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 342 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:47:49,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 335 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:47:49,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-12-13 17:47:50,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 85. [2022-12-13 17:47:50,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:50,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-12-13 17:47:50,169 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-12-13 17:47:50,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:47:50,169 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-12-13 17:47:50,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:50,170 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-12-13 17:47:50,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-13 17:47:50,170 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:47:50,170 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:47:50,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-12-13 17:47:50,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-12-13 17:47:50,371 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:47:50,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:47:50,372 INFO L85 PathProgramCache]: Analyzing trace with hash 457746204, now seen corresponding path program 64 times [2022-12-13 17:47:50,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:47:50,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213486515] [2022-12-13 17:47:50,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:47:50,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:47:50,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:47:50,714 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 188 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:50,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:47:50,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213486515] [2022-12-13 17:47:50,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213486515] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:47:50,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410414059] [2022-12-13 17:47:50,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:47:50,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:50,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:47:50,715 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:47:50,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-12-13 17:47:50,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:47:50,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:47:50,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 17:47:50,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:47:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:51,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:47:51,530 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:51,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410414059] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:47:51,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:47:51,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 52 [2022-12-13 17:47:51,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233279099] [2022-12-13 17:47:51,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:47:51,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-12-13 17:47:51,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:47:51,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-12-13 17:47:51,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=2171, Unknown=0, NotChecked=0, Total=2652 [2022-12-13 17:47:51,532 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 52 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:55,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:47:55,345 INFO L93 Difference]: Finished difference Result 622 states and 647 transitions. [2022-12-13 17:47:55,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-12-13 17:47:55,345 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 52 states have internal predecessors, (112), 0 states have call successors, (0), 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 59 [2022-12-13 17:47:55,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:47:55,346 INFO L225 Difference]: With dead ends: 622 [2022-12-13 17:47:55,346 INFO L226 Difference]: Without dead ends: 579 [2022-12-13 17:47:55,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 70 SyntacticMatches, 27 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5480 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2298, Invalid=11042, Unknown=0, NotChecked=0, Total=13340 [2022-12-13 17:47:55,347 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 363 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:47:55,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 320 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:47:55,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-12-13 17:47:55,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 85. [2022-12-13 17:47:55,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:55,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-12-13 17:47:55,670 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-12-13 17:47:55,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:47:55,670 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-12-13 17:47:55,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 52 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:55,670 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-12-13 17:47:55,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-13 17:47:55,671 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:47:55,671 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:47:55,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-12-13 17:47:55,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-12-13 17:47:55,872 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:47:55,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:47:55,873 INFO L85 PathProgramCache]: Analyzing trace with hash 337870589, now seen corresponding path program 65 times [2022-12-13 17:47:55,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:47:55,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932480164] [2022-12-13 17:47:55,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:47:55,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:47:55,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:47:56,188 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 188 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:56,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:47:56,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932480164] [2022-12-13 17:47:56,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932480164] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:47:56,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220611179] [2022-12-13 17:47:56,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:47:56,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:47:56,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:47:56,189 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:47:56,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-12-13 17:47:56,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-12-13 17:47:56,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:47:56,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 17:47:56,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:47:56,605 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:56,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:47:56,845 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:56,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220611179] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:47:56,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:47:56,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 51 [2022-12-13 17:47:56,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315025603] [2022-12-13 17:47:56,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:47:56,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-13 17:47:56,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:47:56,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-13 17:47:56,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=2073, Unknown=0, NotChecked=0, Total=2550 [2022-12-13 17:47:56,847 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 51 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:00,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:48:00,715 INFO L93 Difference]: Finished difference Result 666 states and 692 transitions. [2022-12-13 17:48:00,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-12-13 17:48:00,716 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 51 states have internal predecessors, (111), 0 states have call successors, (0), 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 59 [2022-12-13 17:48:00,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:48:00,717 INFO L225 Difference]: With dead ends: 666 [2022-12-13 17:48:00,717 INFO L226 Difference]: Without dead ends: 623 [2022-12-13 17:48:00,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 71 SyntacticMatches, 27 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4792 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2038, Invalid=9734, Unknown=0, NotChecked=0, Total=11772 [2022-12-13 17:48:00,717 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 588 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:48:00,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 297 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:48:00,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-12-13 17:48:01,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 85. [2022-12-13 17:48:01,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:01,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-12-13 17:48:01,044 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-12-13 17:48:01,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:48:01,044 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-12-13 17:48:01,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 51 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:01,044 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-12-13 17:48:01,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-13 17:48:01,044 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:48:01,045 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:48:01,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-12-13 17:48:01,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-12-13 17:48:01,246 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:48:01,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:48:01,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1467111684, now seen corresponding path program 66 times [2022-12-13 17:48:01,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:48:01,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56664790] [2022-12-13 17:48:01,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:48:01,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:48:01,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:48:01,578 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 188 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:01,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:48:01,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56664790] [2022-12-13 17:48:01,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56664790] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:48:01,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95004051] [2022-12-13 17:48:01,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:48:01,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:48:01,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:48:01,579 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:48:01,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-12-13 17:48:01,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-12-13 17:48:01,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:48:01,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 17:48:01,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:48:01,980 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:01,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:48:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:02,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95004051] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:48:02,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:48:02,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 50 [2022-12-13 17:48:02,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896140256] [2022-12-13 17:48:02,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:48:02,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-13 17:48:02,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:48:02,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-13 17:48:02,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=1973, Unknown=0, NotChecked=0, Total=2450 [2022-12-13 17:48:02,205 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:06,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:48:06,269 INFO L93 Difference]: Finished difference Result 709 states and 736 transitions. [2022-12-13 17:48:06,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-12-13 17:48:06,269 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 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 59 [2022-12-13 17:48:06,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:48:06,270 INFO L225 Difference]: With dead ends: 709 [2022-12-13 17:48:06,270 INFO L226 Difference]: Without dead ends: 666 [2022-12-13 17:48:06,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 72 SyntacticMatches, 27 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3943 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1740, Invalid=8160, Unknown=0, NotChecked=0, Total=9900 [2022-12-13 17:48:06,270 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 489 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:48:06,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 307 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:48:06,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-12-13 17:48:06,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 85. [2022-12-13 17:48:06,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:06,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-12-13 17:48:06,609 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-12-13 17:48:06,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:48:06,609 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-12-13 17:48:06,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:06,609 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-12-13 17:48:06,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-13 17:48:06,610 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:48:06,610 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:48:06,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-12-13 17:48:06,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-12-13 17:48:06,810 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:48:06,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:48:06,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1940978915, now seen corresponding path program 12 times [2022-12-13 17:48:06,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:48:06,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411404675] [2022-12-13 17:48:06,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:48:06,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:48:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:48:07,123 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:07,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:48:07,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411404675] [2022-12-13 17:48:07,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411404675] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:48:07,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431112843] [2022-12-13 17:48:07,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:48:07,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:48:07,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:48:07,124 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:48:07,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-12-13 17:48:07,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-12-13 17:48:07,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:48:07,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 17:48:07,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:48:07,598 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:07,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:48:07,881 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:07,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431112843] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:48:07,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:48:07,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 49 [2022-12-13 17:48:07,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62474495] [2022-12-13 17:48:07,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:48:07,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-13 17:48:07,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:48:07,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-13 17:48:07,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=1871, Unknown=0, NotChecked=0, Total=2352 [2022-12-13 17:48:07,882 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:11,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:48:11,922 INFO L93 Difference]: Finished difference Result 754 states and 783 transitions. [2022-12-13 17:48:11,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-13 17:48:11,923 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 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 59 [2022-12-13 17:48:11,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:48:11,923 INFO L225 Difference]: With dead ends: 754 [2022-12-13 17:48:11,923 INFO L226 Difference]: Without dead ends: 711 [2022-12-13 17:48:11,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 73 SyntacticMatches, 27 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3038 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1445, Invalid=6387, Unknown=0, NotChecked=0, Total=7832 [2022-12-13 17:48:11,924 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 586 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:48:11,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [586 Valid, 263 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:48:11,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2022-12-13 17:48:12,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 87. [2022-12-13 17:48:12,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.186046511627907) internal successors, (102), 86 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:12,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2022-12-13 17:48:12,264 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 59 [2022-12-13 17:48:12,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:48:12,264 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2022-12-13 17:48:12,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:12,264 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2022-12-13 17:48:12,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-13 17:48:12,264 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:48:12,264 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:48:12,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-12-13 17:48:12,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-12-13 17:48:12,465 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:48:12,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:48:12,466 INFO L85 PathProgramCache]: Analyzing trace with hash -794122025, now seen corresponding path program 24 times [2022-12-13 17:48:12,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:48:12,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118520108] [2022-12-13 17:48:12,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:48:12,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:48:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:48:12,634 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 78 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:12,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:48:12,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118520108] [2022-12-13 17:48:12,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118520108] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:48:12,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725401287] [2022-12-13 17:48:12,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:48:12,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:48:12,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:48:12,636 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:48:12,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-12-13 17:48:12,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-12-13 17:48:12,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:48:12,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 17:48:12,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:48:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:12,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:48:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:12,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725401287] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:48:12,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:48:12,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2022-12-13 17:48:12,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940697413] [2022-12-13 17:48:12,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:48:12,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 17:48:12,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:48:12,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 17:48:12,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2022-12-13 17:48:12,879 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:13,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:48:13,421 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2022-12-13 17:48:13,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 17:48:13,421 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 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 60 [2022-12-13 17:48:13,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:48:13,422 INFO L225 Difference]: With dead ends: 98 [2022-12-13 17:48:13,422 INFO L226 Difference]: Without dead ends: 96 [2022-12-13 17:48:13,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 104 SyntacticMatches, 26 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=398, Invalid=724, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 17:48:13,422 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 88 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:48:13,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 164 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:48:13,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-12-13 17:48:13,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2022-12-13 17:48:13,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 89 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:13,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 105 transitions. [2022-12-13 17:48:13,773 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 105 transitions. Word has length 60 [2022-12-13 17:48:13,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:48:13,773 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 105 transitions. [2022-12-13 17:48:13,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:13,773 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 105 transitions. [2022-12-13 17:48:13,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 17:48:13,773 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:48:13,774 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:48:13,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-12-13 17:48:13,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-12-13 17:48:13,974 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:48:13,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:48:13,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1004537287, now seen corresponding path program 25 times [2022-12-13 17:48:13,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:48:13,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036812046] [2022-12-13 17:48:13,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:48:13,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:48:13,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:48:14,330 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:14,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:48:14,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036812046] [2022-12-13 17:48:14,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036812046] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:48:14,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672817072] [2022-12-13 17:48:14,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:48:14,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:48:14,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:48:14,331 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:48:14,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-12-13 17:48:14,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:48:14,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 17:48:14,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:48:14,915 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:14,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:48:15,154 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:15,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672817072] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:48:15,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:48:15,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-12-13 17:48:15,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436396461] [2022-12-13 17:48:15,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:48:15,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-12-13 17:48:15,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:48:15,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-12-13 17:48:15,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=3369, Unknown=0, NotChecked=0, Total=4160 [2022-12-13 17:48:15,156 INFO L87 Difference]: Start difference. First operand 90 states and 105 transitions. Second operand has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:16,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:48:16,879 INFO L93 Difference]: Finished difference Result 194 states and 211 transitions. [2022-12-13 17:48:16,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 17:48:16,879 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-12-13 17:48:16,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:48:16,880 INFO L225 Difference]: With dead ends: 194 [2022-12-13 17:48:16,880 INFO L226 Difference]: Without dead ends: 148 [2022-12-13 17:48:16,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 65 SyntacticMatches, 29 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4643 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1650, Invalid=7280, Unknown=0, NotChecked=0, Total=8930 [2022-12-13 17:48:16,880 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:48:16,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 314 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:48:16,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-12-13 17:48:17,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 91. [2022-12-13 17:48:17,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:17,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-12-13 17:48:17,261 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-12-13 17:48:17,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:48:17,261 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-12-13 17:48:17,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:17,261 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-12-13 17:48:17,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 17:48:17,261 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:48:17,261 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:48:17,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-12-13 17:48:17,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:48:17,462 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:48:17,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:48:17,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1170782200, now seen corresponding path program 67 times [2022-12-13 17:48:17,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:48:17,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920707823] [2022-12-13 17:48:17,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:48:17,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:48:17,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:48:17,802 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 223 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:17,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:48:17,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920707823] [2022-12-13 17:48:17,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920707823] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:48:17,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958715137] [2022-12-13 17:48:17,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:48:17,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:48:17,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:48:17,804 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:48:17,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-12-13 17:48:17,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:48:17,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 17:48:17,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:48:18,465 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 260 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:18,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:48:18,724 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 260 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:18,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958715137] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:48:18,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:48:18,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 64 [2022-12-13 17:48:18,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45683226] [2022-12-13 17:48:18,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:48:18,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-13 17:48:18,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:48:18,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-13 17:48:18,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=748, Invalid=3284, Unknown=0, NotChecked=0, Total=4032 [2022-12-13 17:48:18,726 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 64 states, 64 states have (on average 2.0) internal successors, (128), 64 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:21,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:48:21,060 INFO L93 Difference]: Finished difference Result 251 states and 269 transitions. [2022-12-13 17:48:21,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-13 17:48:21,060 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 64 states have internal predecessors, (128), 0 states have call successors, (0), 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 63 [2022-12-13 17:48:21,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:48:21,060 INFO L225 Difference]: With dead ends: 251 [2022-12-13 17:48:21,061 INFO L226 Difference]: Without dead ends: 205 [2022-12-13 17:48:21,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 66 SyntacticMatches, 29 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5431 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1994, Invalid=9348, Unknown=0, NotChecked=0, Total=11342 [2022-12-13 17:48:21,061 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 100 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:48:21,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 293 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:48:21,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-12-13 17:48:21,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 91. [2022-12-13 17:48:21,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:21,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-12-13 17:48:21,473 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-12-13 17:48:21,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:48:21,473 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-12-13 17:48:21,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 64 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:21,473 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-12-13 17:48:21,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 17:48:21,473 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:48:21,473 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:48:21,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-12-13 17:48:21,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:48:21,674 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:48:21,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:48:21,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1933690457, now seen corresponding path program 68 times [2022-12-13 17:48:21,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:48:21,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479229851] [2022-12-13 17:48:21,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:48:21,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:48:21,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:48:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 223 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:22,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:48:22,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479229851] [2022-12-13 17:48:22,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479229851] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:48:22,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284242410] [2022-12-13 17:48:22,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:48:22,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:48:22,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:48:22,075 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:48:22,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-12-13 17:48:22,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:48:22,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:48:22,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 17:48:22,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:48:22,777 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 260 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:22,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:48:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 260 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:23,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284242410] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:48:23,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:48:23,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 63 [2022-12-13 17:48:23,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995280393] [2022-12-13 17:48:23,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:48:23,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-13 17:48:23,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:48:23,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-13 17:48:23,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=3197, Unknown=0, NotChecked=0, Total=3906 [2022-12-13 17:48:23,078 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:25,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:48:25,574 INFO L93 Difference]: Finished difference Result 307 states and 326 transitions. [2022-12-13 17:48:25,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-12-13 17:48:25,574 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 0 states have call successors, (0), 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 63 [2022-12-13 17:48:25,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:48:25,574 INFO L225 Difference]: With dead ends: 307 [2022-12-13 17:48:25,574 INFO L226 Difference]: Without dead ends: 261 [2022-12-13 17:48:25,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 67 SyntacticMatches, 29 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6177 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2348, Invalid=11224, Unknown=0, NotChecked=0, Total=13572 [2022-12-13 17:48:25,575 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 202 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:48:25,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 236 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:48:25,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-12-13 17:48:25,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 91. [2022-12-13 17:48:25,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:25,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-12-13 17:48:25,984 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-12-13 17:48:25,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:48:25,984 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-12-13 17:48:25,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:25,984 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-12-13 17:48:25,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 17:48:25,985 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:48:25,985 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:48:25,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-12-13 17:48:26,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-12-13 17:48:26,185 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:48:26,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:48:26,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1127016408, now seen corresponding path program 69 times [2022-12-13 17:48:26,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:48:26,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142477085] [2022-12-13 17:48:26,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:48:26,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:48:26,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:48:26,532 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 223 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:26,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:48:26,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142477085] [2022-12-13 17:48:26,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142477085] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:48:26,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942164531] [2022-12-13 17:48:26,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:48:26,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:48:26,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:48:26,534 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:48:26,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-12-13 17:48:26,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-12-13 17:48:26,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:48:26,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 17:48:26,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:48:27,304 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 260 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:27,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:48:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 260 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:27,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942164531] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:48:27,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:48:27,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 62 [2022-12-13 17:48:27,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203173978] [2022-12-13 17:48:27,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:48:27,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-12-13 17:48:27,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:48:27,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-12-13 17:48:27,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=3108, Unknown=0, NotChecked=0, Total=3782 [2022-12-13 17:48:27,574 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:30,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:48:30,839 INFO L93 Difference]: Finished difference Result 362 states and 382 transitions. [2022-12-13 17:48:30,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-12-13 17:48:30,839 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 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 63 [2022-12-13 17:48:30,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:48:30,839 INFO L225 Difference]: With dead ends: 362 [2022-12-13 17:48:30,839 INFO L226 Difference]: Without dead ends: 316 [2022-12-13 17:48:30,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 68 SyntacticMatches, 29 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6828 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2667, Invalid=12833, Unknown=0, NotChecked=0, Total=15500 [2022-12-13 17:48:30,840 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 196 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:48:30,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 320 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:48:30,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-12-13 17:48:31,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 91. [2022-12-13 17:48:31,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:31,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-12-13 17:48:31,258 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-12-13 17:48:31,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:48:31,258 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-12-13 17:48:31,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:31,258 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-12-13 17:48:31,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 17:48:31,258 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:48:31,258 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:48:31,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-12-13 17:48:31,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-12-13 17:48:31,459 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:48:31,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:48:31,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1655183993, now seen corresponding path program 70 times [2022-12-13 17:48:31,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:48:31,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160372121] [2022-12-13 17:48:31,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:48:31,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:48:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:48:31,890 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 223 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:31,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:48:31,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160372121] [2022-12-13 17:48:31,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160372121] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:48:31,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406257242] [2022-12-13 17:48:31,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:48:31,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:48:31,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:48:31,892 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:48:31,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-12-13 17:48:31,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:48:31,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:48:31,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 17:48:31,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:48:32,452 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 260 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:32,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:48:32,721 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 260 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:32,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406257242] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:48:32,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:48:32,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 61 [2022-12-13 17:48:32,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078503608] [2022-12-13 17:48:32,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:48:32,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-12-13 17:48:32,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:48:32,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-12-13 17:48:32,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=643, Invalid=3017, Unknown=0, NotChecked=0, Total=3660 [2022-12-13 17:48:32,722 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:37,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:48:37,068 INFO L93 Difference]: Finished difference Result 416 states and 437 transitions. [2022-12-13 17:48:37,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-12-13 17:48:37,068 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 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 63 [2022-12-13 17:48:37,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:48:37,068 INFO L225 Difference]: With dead ends: 416 [2022-12-13 17:48:37,068 INFO L226 Difference]: Without dead ends: 370 [2022-12-13 17:48:37,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 69 SyntacticMatches, 29 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7349 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2927, Invalid=14103, Unknown=0, NotChecked=0, Total=17030 [2022-12-13 17:48:37,069 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 198 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 17:48:37,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 425 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 17:48:37,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-12-13 17:48:37,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 91. [2022-12-13 17:48:37,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:37,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-12-13 17:48:37,504 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-12-13 17:48:37,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:48:37,504 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-12-13 17:48:37,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:37,504 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-12-13 17:48:37,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 17:48:37,504 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:48:37,504 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:48:37,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-12-13 17:48:37,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:48:37,705 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:48:37,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:48:37,706 INFO L85 PathProgramCache]: Analyzing trace with hash 563843000, now seen corresponding path program 71 times [2022-12-13 17:48:37,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:48:37,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280475587] [2022-12-13 17:48:37,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:48:37,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:48:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:48:38,102 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 223 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:38,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:48:38,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280475587] [2022-12-13 17:48:38,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280475587] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:48:38,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146680409] [2022-12-13 17:48:38,103 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:48:38,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:48:38,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:48:38,104 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:48:38,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-12-13 17:48:38,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-12-13 17:48:38,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:48:38,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 17:48:38,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:48:38,694 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 260 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:38,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:48:38,978 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 260 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:38,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146680409] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:48:38,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:48:38,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 60 [2022-12-13 17:48:38,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322472314] [2022-12-13 17:48:38,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:48:38,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-12-13 17:48:38,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:48:38,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-12-13 17:48:38,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=2924, Unknown=0, NotChecked=0, Total=3540 [2022-12-13 17:48:38,980 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:43,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:48:43,759 INFO L93 Difference]: Finished difference Result 469 states and 491 transitions. [2022-12-13 17:48:43,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-12-13 17:48:43,759 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-12-13 17:48:43,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:48:43,759 INFO L225 Difference]: With dead ends: 469 [2022-12-13 17:48:43,759 INFO L226 Difference]: Without dead ends: 423 [2022-12-13 17:48:43,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 70 SyntacticMatches, 29 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7702 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3110, Invalid=14980, Unknown=0, NotChecked=0, Total=18090 [2022-12-13 17:48:43,760 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 265 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:48:43,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 316 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:48:43,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-12-13 17:48:44,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 91. [2022-12-13 17:48:44,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:44,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-12-13 17:48:44,192 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-12-13 17:48:44,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:48:44,192 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-12-13 17:48:44,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:44,192 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-12-13 17:48:44,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 17:48:44,193 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:48:44,193 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:48:44,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-12-13 17:48:44,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2022-12-13 17:48:44,394 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:48:44,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:48:44,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1775564441, now seen corresponding path program 72 times [2022-12-13 17:48:44,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:48:44,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743046765] [2022-12-13 17:48:44,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:48:44,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:48:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:48:44,750 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 223 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:44,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:48:44,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743046765] [2022-12-13 17:48:44,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743046765] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:48:44,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999768566] [2022-12-13 17:48:44,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:48:44,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:48:44,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:48:44,751 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:48:44,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-12-13 17:48:44,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-12-13 17:48:44,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:48:44,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 17:48:44,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:48:45,333 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 260 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:45,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:48:45,659 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 260 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:45,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999768566] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:48:45,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:48:45,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 59 [2022-12-13 17:48:45,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412696441] [2022-12-13 17:48:45,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:48:45,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-12-13 17:48:45,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:48:45,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-12-13 17:48:45,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=2829, Unknown=0, NotChecked=0, Total=3422 [2022-12-13 17:48:45,660 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:50,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:48:50,806 INFO L93 Difference]: Finished difference Result 521 states and 544 transitions. [2022-12-13 17:48:50,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-12-13 17:48:50,806 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-12-13 17:48:50,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:48:50,806 INFO L225 Difference]: With dead ends: 521 [2022-12-13 17:48:50,806 INFO L226 Difference]: Without dead ends: 475 [2022-12-13 17:48:50,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 71 SyntacticMatches, 29 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7861 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3204, Invalid=15428, Unknown=0, NotChecked=0, Total=18632 [2022-12-13 17:48:50,807 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 346 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:48:50,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 277 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:48:50,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-12-13 17:48:51,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 91. [2022-12-13 17:48:51,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:51,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-12-13 17:48:51,263 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-12-13 17:48:51,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:48:51,263 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-12-13 17:48:51,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:51,263 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-12-13 17:48:51,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 17:48:51,263 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:48:51,263 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:48:51,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-12-13 17:48:51,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:48:51,464 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:48:51,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:48:51,465 INFO L85 PathProgramCache]: Analyzing trace with hash 290631576, now seen corresponding path program 73 times [2022-12-13 17:48:51,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:48:51,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767467854] [2022-12-13 17:48:51,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:48:51,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:48:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:48:51,846 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 223 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:51,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:48:51,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767467854] [2022-12-13 17:48:51,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767467854] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:48:51,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306818691] [2022-12-13 17:48:51,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:48:51,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:48:51,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:48:51,847 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:48:51,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-12-13 17:48:51,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:48:51,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 17:48:51,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:48:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 260 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:52,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:48:52,691 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 260 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:52,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306818691] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:48:52,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:48:52,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 58 [2022-12-13 17:48:52,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886140522] [2022-12-13 17:48:52,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:48:52,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-12-13 17:48:52,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:48:52,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-12-13 17:48:52,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=2732, Unknown=0, NotChecked=0, Total=3306 [2022-12-13 17:48:52,693 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 58 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:57,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:48:57,753 INFO L93 Difference]: Finished difference Result 572 states and 596 transitions. [2022-12-13 17:48:57,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-12-13 17:48:57,753 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 58 states have internal predecessors, (122), 0 states have call successors, (0), 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 63 [2022-12-13 17:48:57,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:48:57,754 INFO L225 Difference]: With dead ends: 572 [2022-12-13 17:48:57,754 INFO L226 Difference]: Without dead ends: 526 [2022-12-13 17:48:57,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 72 SyntacticMatches, 29 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7812 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3203, Invalid=15429, Unknown=0, NotChecked=0, Total=18632 [2022-12-13 17:48:57,756 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 382 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:48:57,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 397 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:48:57,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-12-13 17:48:58,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 91. [2022-12-13 17:48:58,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:58,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-12-13 17:48:58,207 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-12-13 17:48:58,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:48:58,207 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-12-13 17:48:58,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 58 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:58,207 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-12-13 17:48:58,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 17:48:58,207 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:48:58,207 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:48:58,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-12-13 17:48:58,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-12-13 17:48:58,408 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:48:58,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:48:58,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1489656505, now seen corresponding path program 74 times [2022-12-13 17:48:58,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:48:58,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114363598] [2022-12-13 17:48:58,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:48:58,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:48:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:48:58,732 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 223 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:58,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:48:58,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114363598] [2022-12-13 17:48:58,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114363598] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:48:58,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346416375] [2022-12-13 17:48:58,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:48:58,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:48:58,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:48:58,734 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:48:58,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-12-13 17:48:58,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:48:58,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:48:58,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 17:48:58,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:48:59,372 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 260 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:59,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:48:59,715 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 260 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:48:59,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346416375] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:48:59,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:48:59,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 57 [2022-12-13 17:48:59,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563991930] [2022-12-13 17:48:59,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:48:59,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-13 17:48:59,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:48:59,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-13 17:48:59,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=2633, Unknown=0, NotChecked=0, Total=3192 [2022-12-13 17:48:59,717 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:05,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:49:05,219 INFO L93 Difference]: Finished difference Result 622 states and 647 transitions. [2022-12-13 17:49:05,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-12-13 17:49:05,219 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 states have internal predecessors, (121), 0 states have call successors, (0), 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 63 [2022-12-13 17:49:05,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:49:05,220 INFO L225 Difference]: With dead ends: 622 [2022-12-13 17:49:05,220 INFO L226 Difference]: Without dead ends: 576 [2022-12-13 17:49:05,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 73 SyntacticMatches, 29 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7549 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3107, Invalid=14983, Unknown=0, NotChecked=0, Total=18090 [2022-12-13 17:49:05,221 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 414 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:49:05,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 293 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:49:05,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-12-13 17:49:05,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 91. [2022-12-13 17:49:05,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:05,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-12-13 17:49:05,773 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-12-13 17:49:05,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:49:05,773 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-12-13 17:49:05,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:05,773 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-12-13 17:49:05,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 17:49:05,773 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:49:05,773 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:05,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-12-13 17:49:05,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:49:05,974 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:49:05,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:05,975 INFO L85 PathProgramCache]: Analyzing trace with hash 974145400, now seen corresponding path program 75 times [2022-12-13 17:49:05,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:49:05,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568051741] [2022-12-13 17:49:05,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:05,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:49:06,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:49:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 223 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:06,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:49:06,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568051741] [2022-12-13 17:49:06,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568051741] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:49:06,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031436272] [2022-12-13 17:49:06,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:49:06,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:49:06,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:49:06,294 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:49:06,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-12-13 17:49:06,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-12-13 17:49:06,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:49:06,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 17:49:06,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:06,744 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 260 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:06,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:49:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 260 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:06,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031436272] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:49:06,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:49:06,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 56 [2022-12-13 17:49:06,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294554632] [2022-12-13 17:49:06,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:49:06,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-12-13 17:49:06,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:49:06,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-12-13 17:49:07,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2022-12-13 17:49:07,000 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 56 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:12,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:49:12,439 INFO L93 Difference]: Finished difference Result 671 states and 697 transitions. [2022-12-13 17:49:12,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-12-13 17:49:12,439 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 56 states have internal predecessors, (120), 0 states have call successors, (0), 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 63 [2022-12-13 17:49:12,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:49:12,439 INFO L225 Difference]: With dead ends: 671 [2022-12-13 17:49:12,439 INFO L226 Difference]: Without dead ends: 625 [2022-12-13 17:49:12,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 74 SyntacticMatches, 29 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7074 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2922, Invalid=14108, Unknown=0, NotChecked=0, Total=17030 [2022-12-13 17:49:12,440 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 403 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:49:12,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 326 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:49:12,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-12-13 17:49:12,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 91. [2022-12-13 17:49:12,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:12,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-12-13 17:49:12,989 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-12-13 17:49:12,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:49:12,989 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-12-13 17:49:12,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 56 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:12,989 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-12-13 17:49:12,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 17:49:12,990 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:49:12,990 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:12,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-12-13 17:49:13,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:49:13,191 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:49:13,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:13,192 INFO L85 PathProgramCache]: Analyzing trace with hash 403326681, now seen corresponding path program 76 times [2022-12-13 17:49:13,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:49:13,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75148112] [2022-12-13 17:49:13,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:13,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:49:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:49:13,543 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 223 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:13,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:49:13,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75148112] [2022-12-13 17:49:13,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75148112] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:49:13,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056802009] [2022-12-13 17:49:13,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:49:13,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:49:13,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:49:13,545 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:49:13,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-12-13 17:49:13,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:49:13,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:49:13,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 17:49:13,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:14,033 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 260 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:14,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:49:14,289 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 260 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:14,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056802009] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:49:14,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:49:14,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 55 [2022-12-13 17:49:14,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787390807] [2022-12-13 17:49:14,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:49:14,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-13 17:49:14,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:49:14,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-13 17:49:14,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=2429, Unknown=0, NotChecked=0, Total=2970 [2022-12-13 17:49:14,290 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:19,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:49:19,722 INFO L93 Difference]: Finished difference Result 719 states and 746 transitions. [2022-12-13 17:49:19,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-12-13 17:49:19,722 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 0 states have call successors, (0), 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 63 [2022-12-13 17:49:19,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:49:19,722 INFO L225 Difference]: With dead ends: 719 [2022-12-13 17:49:19,722 INFO L226 Difference]: Without dead ends: 673 [2022-12-13 17:49:19,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 75 SyntacticMatches, 29 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6401 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2660, Invalid=12840, Unknown=0, NotChecked=0, Total=15500 [2022-12-13 17:49:19,723 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 448 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:49:19,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 326 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:49:19,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-12-13 17:49:20,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 91. [2022-12-13 17:49:20,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:20,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-12-13 17:49:20,342 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-12-13 17:49:20,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:49:20,342 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-12-13 17:49:20,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:20,342 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-12-13 17:49:20,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 17:49:20,342 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:49:20,342 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:20,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-12-13 17:49:20,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-12-13 17:49:20,543 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:49:20,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:20,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1693296808, now seen corresponding path program 77 times [2022-12-13 17:49:20,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:49:20,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155656866] [2022-12-13 17:49:20,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:20,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:49:20,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:49:20,904 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 223 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:20,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:49:20,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155656866] [2022-12-13 17:49:20,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155656866] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:49:20,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744510644] [2022-12-13 17:49:20,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:49:20,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:49:20,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:49:20,905 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:49:20,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-12-13 17:49:20,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-12-13 17:49:20,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:49:20,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 17:49:20,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:21,467 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 260 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:21,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:49:21,795 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 260 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:21,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744510644] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:49:21,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:49:21,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 54 [2022-12-13 17:49:21,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136395717] [2022-12-13 17:49:21,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:49:21,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-13 17:49:21,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:49:21,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-13 17:49:21,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=2324, Unknown=0, NotChecked=0, Total=2862 [2022-12-13 17:49:21,796 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:27,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:49:27,559 INFO L93 Difference]: Finished difference Result 766 states and 794 transitions. [2022-12-13 17:49:27,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-12-13 17:49:27,559 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 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 63 [2022-12-13 17:49:27,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:49:27,560 INFO L225 Difference]: With dead ends: 766 [2022-12-13 17:49:27,560 INFO L226 Difference]: Without dead ends: 720 [2022-12-13 17:49:27,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 76 SyntacticMatches, 29 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5556 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2339, Invalid=11233, Unknown=0, NotChecked=0, Total=13572 [2022-12-13 17:49:27,561 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 485 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:49:27,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 318 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:49:27,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2022-12-13 17:49:28,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 91. [2022-12-13 17:49:28,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:28,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-12-13 17:49:28,026 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-12-13 17:49:28,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:49:28,026 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-12-13 17:49:28,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:28,026 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-12-13 17:49:28,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 17:49:28,027 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:49:28,027 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:28,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-12-13 17:49:28,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-12-13 17:49:28,227 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:49:28,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:28,227 INFO L85 PathProgramCache]: Analyzing trace with hash -929645831, now seen corresponding path program 78 times [2022-12-13 17:49:28,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:49:28,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876629241] [2022-12-13 17:49:28,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:28,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:49:28,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:49:28,538 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 223 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:28,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:49:28,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876629241] [2022-12-13 17:49:28,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876629241] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:49:28,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013932730] [2022-12-13 17:49:28,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:49:28,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:49:28,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:49:28,539 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:49:28,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-12-13 17:49:28,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-12-13 17:49:28,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:49:28,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 17:49:28,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 260 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:29,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:49:29,420 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 260 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:29,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013932730] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:49:29,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:49:29,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 53 [2022-12-13 17:49:29,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645461562] [2022-12-13 17:49:29,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:49:29,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-13 17:49:29,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:49:29,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-13 17:49:29,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=2217, Unknown=0, NotChecked=0, Total=2756 [2022-12-13 17:49:29,421 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:36,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:49:36,102 INFO L93 Difference]: Finished difference Result 812 states and 841 transitions. [2022-12-13 17:49:36,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-12-13 17:49:36,102 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 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 63 [2022-12-13 17:49:36,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:49:36,103 INFO L225 Difference]: With dead ends: 812 [2022-12-13 17:49:36,103 INFO L226 Difference]: Without dead ends: 766 [2022-12-13 17:49:36,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 77 SyntacticMatches, 29 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4547 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1983, Invalid=9359, Unknown=0, NotChecked=0, Total=11342 [2022-12-13 17:49:36,104 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 406 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:49:36,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 399 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:49:36,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-12-13 17:49:36,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 91. [2022-12-13 17:49:36,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:36,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-12-13 17:49:36,579 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-12-13 17:49:36,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:49:36,579 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-12-13 17:49:36,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:36,579 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-12-13 17:49:36,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 17:49:36,580 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:49:36,580 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:36,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-12-13 17:49:36,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-12-13 17:49:36,780 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:49:36,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:36,781 INFO L85 PathProgramCache]: Analyzing trace with hash -350822600, now seen corresponding path program 13 times [2022-12-13 17:49:36,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:49:36,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925962154] [2022-12-13 17:49:36,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:36,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:49:36,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:49:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:37,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:49:37,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925962154] [2022-12-13 17:49:37,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925962154] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:49:37,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258433608] [2022-12-13 17:49:37,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:49:37,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:49:37,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:49:37,269 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:49:37,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-12-13 17:49:37,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:49:37,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 17:49:37,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:37,855 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:37,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:49:38,165 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:38,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258433608] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:49:38,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:49:38,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 52 [2022-12-13 17:49:38,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839396101] [2022-12-13 17:49:38,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:49:38,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-12-13 17:49:38,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:49:38,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-12-13 17:49:38,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=2108, Unknown=0, NotChecked=0, Total=2652 [2022-12-13 17:49:38,166 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 52 states, 52 states have (on average 2.230769230769231) internal successors, (116), 52 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:45,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:49:45,377 INFO L93 Difference]: Finished difference Result 860 states and 891 transitions. [2022-12-13 17:49:45,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-12-13 17:49:45,377 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.230769230769231) internal successors, (116), 52 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-12-13 17:49:45,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:49:45,378 INFO L225 Difference]: With dead ends: 860 [2022-12-13 17:49:45,378 INFO L226 Difference]: Without dead ends: 814 [2022-12-13 17:49:45,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 78 SyntacticMatches, 29 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3489 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1637, Invalid=7293, Unknown=0, NotChecked=0, Total=8930 [2022-12-13 17:49:45,379 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 447 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:49:45,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 356 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:49:45,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-12-13 17:49:46,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 93. [2022-12-13 17:49:46,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.184782608695652) internal successors, (109), 92 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:46,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2022-12-13 17:49:46,136 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 63 [2022-12-13 17:49:46,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:49:46,136 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2022-12-13 17:49:46,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.230769230769231) internal successors, (116), 52 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:46,136 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2022-12-13 17:49:46,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-13 17:49:46,136 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:49:46,136 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:46,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-12-13 17:49:46,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:49:46,338 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:49:46,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:46,338 INFO L85 PathProgramCache]: Analyzing trace with hash -2032864333, now seen corresponding path program 26 times [2022-12-13 17:49:46,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:49:46,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700354048] [2022-12-13 17:49:46,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:46,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:49:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:49:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 91 proven. 274 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:46,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:49:46,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700354048] [2022-12-13 17:49:46,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700354048] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:49:46,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717649932] [2022-12-13 17:49:46,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:49:46,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:49:46,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:49:46,585 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:49:46,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-12-13 17:49:46,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:49:46,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:49:46,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 17:49:46,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:46,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:49:46,882 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:46,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717649932] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:49:46,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:49:46,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 20 [2022-12-13 17:49:46,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256134367] [2022-12-13 17:49:46,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:49:46,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 17:49:46,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:49:46,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 17:49:46,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2022-12-13 17:49:46,884 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:47,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:49:47,618 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2022-12-13 17:49:47,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 17:49:47,618 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 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 64 [2022-12-13 17:49:47,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:49:47,619 INFO L225 Difference]: With dead ends: 104 [2022-12-13 17:49:47,619 INFO L226 Difference]: Without dead ends: 102 [2022-12-13 17:49:47,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 111 SyntacticMatches, 28 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=448, Invalid=812, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 17:49:47,619 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 66 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:49:47,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 236 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:49:47,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-12-13 17:49:48,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2022-12-13 17:49:48,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 95 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:48,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2022-12-13 17:49:48,154 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 64 [2022-12-13 17:49:48,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:49:48,155 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2022-12-13 17:49:48,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:48,155 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2022-12-13 17:49:48,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-13 17:49:48,155 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:49:48,155 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:48,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-12-13 17:49:48,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:49:48,356 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:49:48,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:48,357 INFO L85 PathProgramCache]: Analyzing trace with hash -2017627683, now seen corresponding path program 27 times [2022-12-13 17:49:48,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:49:48,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363468058] [2022-12-13 17:49:48,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:48,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:49:48,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:49:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 261 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:48,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:49:48,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363468058] [2022-12-13 17:49:48,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363468058] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:49:48,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782599798] [2022-12-13 17:49:48,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:49:48,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:49:48,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:49:48,820 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:49:48,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-12-13 17:49:48,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-12-13 17:49:48,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:49:48,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 17:49:48,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:49,492 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:49,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:49:49,848 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:49,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782599798] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:49:49,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:49:49,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2022-12-13 17:49:49,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295096020] [2022-12-13 17:49:49,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:49:49,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-12-13 17:49:49,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:49:49,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-12-13 17:49:49,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=891, Invalid=3801, Unknown=0, NotChecked=0, Total=4692 [2022-12-13 17:49:49,849 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 69 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:51,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:49:51,620 INFO L93 Difference]: Finished difference Result 207 states and 225 transitions. [2022-12-13 17:49:51,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 17:49:51,620 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 69 states have internal predecessors, (137), 0 states have call successors, (0), 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 67 [2022-12-13 17:49:51,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:49:51,620 INFO L225 Difference]: With dead ends: 207 [2022-12-13 17:49:51,620 INFO L226 Difference]: Without dead ends: 158 [2022-12-13 17:49:51,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 69 SyntacticMatches, 31 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5298 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1855, Invalid=8245, Unknown=0, NotChecked=0, Total=10100 [2022-12-13 17:49:51,621 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 55 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:49:51,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 235 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:49:51,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-12-13 17:49:52,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 97. [2022-12-13 17:49:52,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:52,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-12-13 17:49:52,159 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-12-13 17:49:52,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:49:52,159 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-12-13 17:49:52,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 69 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:52,159 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-12-13 17:49:52,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-13 17:49:52,160 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:49:52,160 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:52,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-12-13 17:49:52,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:49:52,361 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:49:52,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:52,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1732458524, now seen corresponding path program 79 times [2022-12-13 17:49:52,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:49:52,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562013989] [2022-12-13 17:49:52,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:52,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:49:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:49:52,756 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 261 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:52,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:49:52,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562013989] [2022-12-13 17:49:52,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562013989] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:49:52,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019831500] [2022-12-13 17:49:52,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:49:52,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:49:52,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:49:52,757 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:49:52,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-12-13 17:49:52,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:49:52,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 17:49:52,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:53,398 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 301 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:53,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:49:53,714 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 301 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:53,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019831500] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:49:53,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:49:53,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 68 [2022-12-13 17:49:53,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613736855] [2022-12-13 17:49:53,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:49:53,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-13 17:49:53,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:49:53,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-13 17:49:53,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=845, Invalid=3711, Unknown=0, NotChecked=0, Total=4556 [2022-12-13 17:49:53,716 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 68 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:56,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:49:56,245 INFO L93 Difference]: Finished difference Result 268 states and 287 transitions. [2022-12-13 17:49:56,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-13 17:49:56,245 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 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 67 [2022-12-13 17:49:56,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:49:56,245 INFO L225 Difference]: With dead ends: 268 [2022-12-13 17:49:56,246 INFO L226 Difference]: Without dead ends: 219 [2022-12-13 17:49:56,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 70 SyntacticMatches, 31 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6218 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2254, Invalid=10628, Unknown=0, NotChecked=0, Total=12882 [2022-12-13 17:49:56,246 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 103 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:49:56,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 247 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:49:56,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-12-13 17:49:56,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 97. [2022-12-13 17:49:56,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:56,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-12-13 17:49:56,806 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-12-13 17:49:56,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:49:56,806 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-12-13 17:49:56,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:56,806 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-12-13 17:49:56,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-13 17:49:56,806 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:49:56,806 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:56,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-12-13 17:49:57,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:49:57,007 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:49:57,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:57,008 INFO L85 PathProgramCache]: Analyzing trace with hash -86233603, now seen corresponding path program 80 times [2022-12-13 17:49:57,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:49:57,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412853254] [2022-12-13 17:49:57,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:57,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:49:57,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:49:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 261 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:57,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:49:57,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412853254] [2022-12-13 17:49:57,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412853254] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:49:57,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719889947] [2022-12-13 17:49:57,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:49:57,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:49:57,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:49:57,435 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:49:57,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-12-13 17:49:57,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:49:57,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:49:57,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 17:49:57,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:58,114 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 301 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:58,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:49:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 301 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:49:58,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719889947] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:49:58,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:49:58,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 67 [2022-12-13 17:49:58,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630919276] [2022-12-13 17:49:58,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:49:58,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-12-13 17:49:58,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:49:58,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-12-13 17:49:58,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=3619, Unknown=0, NotChecked=0, Total=4422 [2022-12-13 17:49:58,449 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 67 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:01,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:50:01,716 INFO L93 Difference]: Finished difference Result 328 states and 348 transitions. [2022-12-13 17:50:01,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-12-13 17:50:01,716 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 67 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-12-13 17:50:01,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:50:01,716 INFO L225 Difference]: With dead ends: 328 [2022-12-13 17:50:01,717 INFO L226 Difference]: Without dead ends: 279 [2022-12-13 17:50:01,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 71 SyntacticMatches, 31 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7107 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2671, Invalid=12829, Unknown=0, NotChecked=0, Total=15500 [2022-12-13 17:50:01,718 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 132 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:50:01,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 293 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:50:01,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-12-13 17:50:02,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 97. [2022-12-13 17:50:02,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:02,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-12-13 17:50:02,314 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-12-13 17:50:02,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:50:02,314 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-12-13 17:50:02,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 67 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:02,314 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-12-13 17:50:02,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-13 17:50:02,314 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:50:02,314 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:50:02,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-12-13 17:50:02,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2022-12-13 17:50:02,515 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:50:02,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:50:02,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1253279748, now seen corresponding path program 81 times [2022-12-13 17:50:02,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:50:02,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938570469] [2022-12-13 17:50:02,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:50:02,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:50:02,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:50:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 261 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:02,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:50:02,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938570469] [2022-12-13 17:50:02,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938570469] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:50:02,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304971398] [2022-12-13 17:50:02,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:50:02,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:50:02,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:50:02,979 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:50:02,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-12-13 17:50:03,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-12-13 17:50:03,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:50:03,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 17:50:03,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:50:03,676 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 301 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:03,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:50:04,011 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 301 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:04,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304971398] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:50:04,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:50:04,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 66 [2022-12-13 17:50:04,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463833666] [2022-12-13 17:50:04,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:50:04,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-12-13 17:50:04,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:50:04,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-12-13 17:50:04,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=3525, Unknown=0, NotChecked=0, Total=4290 [2022-12-13 17:50:04,012 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 66 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:08,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:50:08,230 INFO L93 Difference]: Finished difference Result 387 states and 408 transitions. [2022-12-13 17:50:08,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-12-13 17:50:08,230 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 66 states have internal predecessors, (134), 0 states have call successors, (0), 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 67 [2022-12-13 17:50:08,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:50:08,230 INFO L225 Difference]: With dead ends: 387 [2022-12-13 17:50:08,230 INFO L226 Difference]: Without dead ends: 338 [2022-12-13 17:50:08,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 72 SyntacticMatches, 31 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7907 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3057, Invalid=14765, Unknown=0, NotChecked=0, Total=17822 [2022-12-13 17:50:08,231 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 203 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:50:08,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 293 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:50:08,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-12-13 17:50:08,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 97. [2022-12-13 17:50:08,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:08,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-12-13 17:50:08,818 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-12-13 17:50:08,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:50:08,818 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-12-13 17:50:08,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 66 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:08,818 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-12-13 17:50:08,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-13 17:50:08,818 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:50:08,818 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:50:08,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-12-13 17:50:09,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:50:09,019 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:50:09,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:50:09,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1757114909, now seen corresponding path program 82 times [2022-12-13 17:50:09,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:50:09,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122692652] [2022-12-13 17:50:09,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:50:09,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:50:09,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:50:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 261 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:09,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:50:09,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122692652] [2022-12-13 17:50:09,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122692652] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:50:09,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530442570] [2022-12-13 17:50:09,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:50:09,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:50:09,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:50:09,426 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:50:09,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-12-13 17:50:09,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:50:09,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:50:09,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 17:50:09,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:50:10,093 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 301 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:10,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:50:10,419 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 301 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:10,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530442570] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:50:10,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:50:10,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 65 [2022-12-13 17:50:10,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397456929] [2022-12-13 17:50:10,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:50:10,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-12-13 17:50:10,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:50:10,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-12-13 17:50:10,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=731, Invalid=3429, Unknown=0, NotChecked=0, Total=4160 [2022-12-13 17:50:10,421 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:14,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:50:14,875 INFO L93 Difference]: Finished difference Result 445 states and 467 transitions. [2022-12-13 17:50:14,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-12-13 17:50:14,875 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 0 states have call successors, (0), 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 67 [2022-12-13 17:50:14,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:50:14,876 INFO L225 Difference]: With dead ends: 445 [2022-12-13 17:50:14,876 INFO L226 Difference]: Without dead ends: 396 [2022-12-13 17:50:14,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 73 SyntacticMatches, 31 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8578 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3385, Invalid=16355, Unknown=0, NotChecked=0, Total=19740 [2022-12-13 17:50:14,877 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 268 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:50:14,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 335 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:50:14,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-12-13 17:50:15,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 97. [2022-12-13 17:50:15,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:15,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-12-13 17:50:15,474 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-12-13 17:50:15,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:50:15,474 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-12-13 17:50:15,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:15,474 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-12-13 17:50:15,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-13 17:50:15,475 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:50:15,475 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:50:15,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-12-13 17:50:15,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-12-13 17:50:15,675 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:50:15,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:50:15,676 INFO L85 PathProgramCache]: Analyzing trace with hash -362532900, now seen corresponding path program 83 times [2022-12-13 17:50:15,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:50:15,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173072903] [2022-12-13 17:50:15,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:50:15,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:50:15,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:50:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 261 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:16,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:50:16,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173072903] [2022-12-13 17:50:16,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173072903] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:50:16,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851379170] [2022-12-13 17:50:16,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:50:16,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:50:16,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:50:16,118 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:50:16,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-12-13 17:50:16,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-12-13 17:50:16,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:50:16,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 17:50:16,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:50:16,870 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 301 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:16,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:50:17,223 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 301 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:17,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851379170] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:50:17,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:50:17,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 64 [2022-12-13 17:50:17,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582523671] [2022-12-13 17:50:17,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:50:17,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-13 17:50:17,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:50:17,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-13 17:50:17,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=3331, Unknown=0, NotChecked=0, Total=4032 [2022-12-13 17:50:17,225 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 64 states, 64 states have (on average 2.0625) internal successors, (132), 64 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:23,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:50:23,091 INFO L93 Difference]: Finished difference Result 502 states and 525 transitions. [2022-12-13 17:50:23,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-12-13 17:50:23,092 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0625) internal successors, (132), 64 states have internal predecessors, (132), 0 states have call successors, (0), 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 67 [2022-12-13 17:50:23,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:50:23,092 INFO L225 Difference]: With dead ends: 502 [2022-12-13 17:50:23,092 INFO L226 Difference]: Without dead ends: 453 [2022-12-13 17:50:23,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 74 SyntacticMatches, 31 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9076 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3634, Invalid=17536, Unknown=0, NotChecked=0, Total=21170 [2022-12-13 17:50:23,093 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 287 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:50:23,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 356 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:50:23,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-12-13 17:50:23,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 97. [2022-12-13 17:50:23,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:23,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-12-13 17:50:23,742 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-12-13 17:50:23,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:50:23,742 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-12-13 17:50:23,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.0625) internal successors, (132), 64 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:23,743 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-12-13 17:50:23,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-13 17:50:23,743 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:50:23,743 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:50:23,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-12-13 17:50:23,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-12-13 17:50:23,944 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:50:23,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:50:23,945 INFO L85 PathProgramCache]: Analyzing trace with hash 400375357, now seen corresponding path program 84 times [2022-12-13 17:50:23,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:50:23,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030622610] [2022-12-13 17:50:23,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:50:23,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:50:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:50:24,312 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 261 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:24,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:50:24,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030622610] [2022-12-13 17:50:24,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030622610] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:50:24,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354067159] [2022-12-13 17:50:24,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:50:24,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:50:24,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:50:24,313 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:50:24,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-12-13 17:50:24,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-12-13 17:50:24,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:50:24,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 17:50:24,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:50:24,927 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 301 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:24,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:50:25,271 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 301 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:25,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354067159] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:50:25,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:50:25,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 63 [2022-12-13 17:50:25,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713580016] [2022-12-13 17:50:25,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:50:25,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-13 17:50:25,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:50:25,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-13 17:50:25,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=3231, Unknown=0, NotChecked=0, Total=3906 [2022-12-13 17:50:25,272 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:31,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:50:31,651 INFO L93 Difference]: Finished difference Result 558 states and 582 transitions. [2022-12-13 17:50:31,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-12-13 17:50:31,651 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 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 67 [2022-12-13 17:50:31,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:50:31,652 INFO L225 Difference]: With dead ends: 558 [2022-12-13 17:50:31,652 INFO L226 Difference]: Without dead ends: 509 [2022-12-13 17:50:31,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 75 SyntacticMatches, 31 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9369 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3789, Invalid=18263, Unknown=0, NotChecked=0, Total=22052 [2022-12-13 17:50:31,653 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 388 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:50:31,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 391 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:50:31,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-12-13 17:50:32,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 97. [2022-12-13 17:50:32,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:32,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-12-13 17:50:32,295 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-12-13 17:50:32,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:50:32,295 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-12-13 17:50:32,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:32,295 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-12-13 17:50:32,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-13 17:50:32,295 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:50:32,295 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:50:32,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-12-13 17:50:32,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-12-13 17:50:32,496 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:50:32,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:50:32,497 INFO L85 PathProgramCache]: Analyzing trace with hash -406298692, now seen corresponding path program 85 times [2022-12-13 17:50:32,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:50:32,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325941243] [2022-12-13 17:50:32,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:50:32,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:50:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:50:32,977 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 261 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:32,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:50:32,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325941243] [2022-12-13 17:50:32,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325941243] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:50:32,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71009361] [2022-12-13 17:50:32,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:50:32,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:50:32,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:50:32,978 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:50:32,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-12-13 17:50:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:50:33,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 17:50:33,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:50:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 301 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:33,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:50:33,885 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 301 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:33,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71009361] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:50:33,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:50:33,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 62 [2022-12-13 17:50:33,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908581259] [2022-12-13 17:50:33,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:50:33,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-12-13 17:50:33,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:50:33,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-12-13 17:50:33,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=3129, Unknown=0, NotChecked=0, Total=3782 [2022-12-13 17:50:33,887 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 62 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:40,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:50:40,358 INFO L93 Difference]: Finished difference Result 613 states and 638 transitions. [2022-12-13 17:50:40,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-12-13 17:50:40,358 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 62 states have internal predecessors, (130), 0 states have call successors, (0), 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 67 [2022-12-13 17:50:40,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:50:40,358 INFO L225 Difference]: With dead ends: 613 [2022-12-13 17:50:40,359 INFO L226 Difference]: Without dead ends: 564 [2022-12-13 17:50:40,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 76 SyntacticMatches, 31 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9437 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3841, Invalid=18509, Unknown=0, NotChecked=0, Total=22350 [2022-12-13 17:50:40,360 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 363 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:50:40,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 364 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:50:40,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-12-13 17:50:40,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 97. [2022-12-13 17:50:40,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:40,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-12-13 17:50:40,980 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-12-13 17:50:40,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:50:40,980 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-12-13 17:50:40,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 62 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:40,980 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-12-13 17:50:40,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-13 17:50:40,980 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:50:40,980 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:50:40,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-12-13 17:50:41,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:50:41,182 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:50:41,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:50:41,183 INFO L85 PathProgramCache]: Analyzing trace with hash 121868893, now seen corresponding path program 86 times [2022-12-13 17:50:41,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:50:41,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276299293] [2022-12-13 17:50:41,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:50:41,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:50:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:50:41,533 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 261 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:41,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:50:41,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276299293] [2022-12-13 17:50:41,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276299293] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:50:41,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208599043] [2022-12-13 17:50:41,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:50:41,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:50:41,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:50:41,534 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:50:41,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-12-13 17:50:41,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:50:41,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:50:41,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 17:50:41,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:50:42,181 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 301 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:42,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:50:42,448 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 301 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:42,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208599043] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:50:42,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:50:42,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 61 [2022-12-13 17:50:42,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598731153] [2022-12-13 17:50:42,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:50:42,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-12-13 17:50:42,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:50:42,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-12-13 17:50:42,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=3025, Unknown=0, NotChecked=0, Total=3660 [2022-12-13 17:50:42,450 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:49,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:50:49,467 INFO L93 Difference]: Finished difference Result 667 states and 693 transitions. [2022-12-13 17:50:49,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-12-13 17:50:49,467 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-12-13 17:50:49,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:50:49,468 INFO L225 Difference]: With dead ends: 667 [2022-12-13 17:50:49,468 INFO L226 Difference]: Without dead ends: 618 [2022-12-13 17:50:49,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 77 SyntacticMatches, 31 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9271 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3787, Invalid=18265, Unknown=0, NotChecked=0, Total=22052 [2022-12-13 17:50:49,469 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 374 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:50:49,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 418 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:50:49,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-12-13 17:50:50,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 97. [2022-12-13 17:50:50,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:50,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-12-13 17:50:50,092 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-12-13 17:50:50,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:50:50,092 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-12-13 17:50:50,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:50,093 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-12-13 17:50:50,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-13 17:50:50,093 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:50:50,093 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:50:50,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-12-13 17:50:50,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:50:50,294 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:50:50,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:50:50,295 INFO L85 PathProgramCache]: Analyzing trace with hash -969472100, now seen corresponding path program 87 times [2022-12-13 17:50:50,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:50:50,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122339795] [2022-12-13 17:50:50,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:50:50,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:50:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:50:50,619 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 261 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:50,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:50:50,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122339795] [2022-12-13 17:50:50,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122339795] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:50:50,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754162582] [2022-12-13 17:50:50,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:50:50,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:50:50,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:50:50,621 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:50:50,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-12-13 17:50:50,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-12-13 17:50:50,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:50:50,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 17:50:50,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:50:51,272 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 301 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:51,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:50:51,571 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 301 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:51,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754162582] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:50:51,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:50:51,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 60 [2022-12-13 17:50:51,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798382966] [2022-12-13 17:50:51,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:50:51,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-12-13 17:50:51,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:50:51,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-12-13 17:50:51,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=2919, Unknown=0, NotChecked=0, Total=3540 [2022-12-13 17:50:51,573 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 60 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 60 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:58,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:50:58,528 INFO L93 Difference]: Finished difference Result 720 states and 747 transitions. [2022-12-13 17:50:58,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-12-13 17:50:58,529 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 60 states have internal predecessors, (128), 0 states have call successors, (0), 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 67 [2022-12-13 17:50:58,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:50:58,529 INFO L225 Difference]: With dead ends: 720 [2022-12-13 17:50:58,529 INFO L226 Difference]: Without dead ends: 671 [2022-12-13 17:50:58,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 78 SyntacticMatches, 31 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8868 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3630, Invalid=17540, Unknown=0, NotChecked=0, Total=21170 [2022-12-13 17:50:58,530 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 583 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:50:58,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [583 Valid, 319 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:50:58,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2022-12-13 17:50:59,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 97. [2022-12-13 17:50:59,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:59,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-12-13 17:50:59,166 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-12-13 17:50:59,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:50:59,166 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-12-13 17:50:59,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 60 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:59,166 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-12-13 17:50:59,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-13 17:50:59,166 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:50:59,166 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:50:59,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-12-13 17:50:59,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-12-13 17:50:59,367 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:50:59,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:50:59,368 INFO L85 PathProgramCache]: Analyzing trace with hash 242249341, now seen corresponding path program 88 times [2022-12-13 17:50:59,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:50:59,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826131025] [2022-12-13 17:50:59,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:50:59,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:50:59,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:50:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 261 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:59,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:50:59,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826131025] [2022-12-13 17:50:59,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826131025] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:50:59,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618669998] [2022-12-13 17:50:59,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:50:59,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:50:59,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:50:59,823 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:50:59,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-12-13 17:50:59,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:50:59,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:50:59,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 17:50:59,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:51:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 301 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:51:00,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:51:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 301 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:51:00,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618669998] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:51:00,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:51:00,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 59 [2022-12-13 17:51:00,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641921401] [2022-12-13 17:51:00,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:51:00,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-12-13 17:51:00,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:51:00,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-12-13 17:51:00,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=2811, Unknown=0, NotChecked=0, Total=3422 [2022-12-13 17:51:00,624 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:51:08,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:51:08,011 INFO L93 Difference]: Finished difference Result 772 states and 800 transitions. [2022-12-13 17:51:08,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-12-13 17:51:08,011 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 states have internal predecessors, (127), 0 states have call successors, (0), 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 67 [2022-12-13 17:51:08,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:51:08,012 INFO L225 Difference]: With dead ends: 772 [2022-12-13 17:51:08,012 INFO L226 Difference]: Without dead ends: 723 [2022-12-13 17:51:08,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 79 SyntacticMatches, 31 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8236 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3379, Invalid=16361, Unknown=0, NotChecked=0, Total=19740 [2022-12-13 17:51:08,013 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 397 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:51:08,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 386 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:51:08,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-12-13 17:51:08,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 97. [2022-12-13 17:51:08,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:51:08,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-12-13 17:51:08,662 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-12-13 17:51:08,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:51:08,662 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-12-13 17:51:08,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:51:08,662 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-12-13 17:51:08,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-13 17:51:08,662 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:51:08,662 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:51:08,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-12-13 17:51:08,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:51:08,863 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:51:08,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:51:08,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1242683524, now seen corresponding path program 89 times [2022-12-13 17:51:08,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:51:08,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497725107] [2022-12-13 17:51:08,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:51:08,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:51:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:51:09,246 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 261 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:51:09,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:51:09,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497725107] [2022-12-13 17:51:09,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497725107] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:51:09,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371646813] [2022-12-13 17:51:09,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:51:09,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:51:09,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:51:09,247 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:51:09,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-12-13 17:51:09,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-12-13 17:51:09,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:51:09,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 17:51:09,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:51:09,751 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 301 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:51:09,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:51:10,089 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 301 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:51:10,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371646813] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:51:10,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:51:10,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 58 [2022-12-13 17:51:10,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612501797] [2022-12-13 17:51:10,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:51:10,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-12-13 17:51:10,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:51:10,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-12-13 17:51:10,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=2701, Unknown=0, NotChecked=0, Total=3306 [2022-12-13 17:51:10,091 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 58 states, 58 states have (on average 2.1724137931034484) internal successors, (126), 58 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:51:18,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:51:18,731 INFO L93 Difference]: Finished difference Result 823 states and 852 transitions. [2022-12-13 17:51:18,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-12-13 17:51:18,731 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1724137931034484) internal successors, (126), 58 states have internal predecessors, (126), 0 states have call successors, (0), 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 67 [2022-12-13 17:51:18,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:51:18,732 INFO L225 Difference]: With dead ends: 823 [2022-12-13 17:51:18,732 INFO L226 Difference]: Without dead ends: 774 [2022-12-13 17:51:18,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 80 SyntacticMatches, 31 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7395 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3049, Invalid=14773, Unknown=0, NotChecked=0, Total=17822 [2022-12-13 17:51:18,733 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 569 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:51:18,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [569 Valid, 342 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:51:18,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-12-13 17:51:19,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 97. [2022-12-13 17:51:19,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:51:19,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-12-13 17:51:19,379 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-12-13 17:51:19,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:51:19,380 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-12-13 17:51:19,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.1724137931034484) internal successors, (126), 58 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:51:19,380 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-12-13 17:51:19,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-13 17:51:19,383 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:51:19,383 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:51:19,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-12-13 17:51:19,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:51:19,584 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:51:19,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:51:19,584 INFO L85 PathProgramCache]: Analyzing trace with hash -43658595, now seen corresponding path program 90 times [2022-12-13 17:51:19,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:51:19,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299369540] [2022-12-13 17:51:19,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:51:19,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:51:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:51:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 261 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:51:19,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:51:19,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299369540] [2022-12-13 17:51:19,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299369540] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:51:19,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658610268] [2022-12-13 17:51:19,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:51:19,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:51:19,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:51:19,926 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:51:19,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-12-13 17:51:19,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-12-13 17:51:19,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:51:19,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 17:51:19,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:51:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 301 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:51:20,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:51:20,815 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 301 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:51:20,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658610268] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:51:20,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:51:20,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 57 [2022-12-13 17:51:20,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758129488] [2022-12-13 17:51:20,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:51:20,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-13 17:51:20,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:51:20,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-13 17:51:20,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=2589, Unknown=0, NotChecked=0, Total=3192 [2022-12-13 17:51:20,817 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 57 states, 57 states have (on average 2.192982456140351) internal successors, (125), 57 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:51:29,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:51:29,355 INFO L93 Difference]: Finished difference Result 873 states and 903 transitions. [2022-12-13 17:51:29,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-12-13 17:51:29,355 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.192982456140351) internal successors, (125), 57 states have internal predecessors, (125), 0 states have call successors, (0), 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 67 [2022-12-13 17:51:29,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:51:29,356 INFO L225 Difference]: With dead ends: 873 [2022-12-13 17:51:29,356 INFO L226 Difference]: Without dead ends: 824 [2022-12-13 17:51:29,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 81 SyntacticMatches, 31 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6377 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2661, Invalid=12839, Unknown=0, NotChecked=0, Total=15500 [2022-12-13 17:51:29,357 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 455 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:51:29,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 411 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:51:29,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-12-13 17:51:30,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 97. [2022-12-13 17:51:30,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:51:30,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-12-13 17:51:30,013 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-12-13 17:51:30,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:51:30,013 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-12-13 17:51:30,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.192982456140351) internal successors, (125), 57 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:51:30,013 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-12-13 17:51:30,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-13 17:51:30,013 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:51:30,013 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:51:30,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-12-13 17:51:30,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:51:30,215 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:51:30,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:51:30,215 INFO L85 PathProgramCache]: Analyzing trace with hash -559169700, now seen corresponding path program 91 times [2022-12-13 17:51:30,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:51:30,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24192551] [2022-12-13 17:51:30,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:51:30,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:51:30,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:51:30,620 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 261 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:51:30,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:51:30,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24192551] [2022-12-13 17:51:30,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24192551] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:51:30,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949696210] [2022-12-13 17:51:30,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:51:30,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:51:30,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:51:30,621 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:51:30,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-12-13 17:51:30,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:51:30,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 17:51:30,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:51:31,163 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 301 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:51:31,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:51:31,431 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 301 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:51:31,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949696210] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:51:31,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:51:31,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 56 [2022-12-13 17:51:31,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704344702] [2022-12-13 17:51:31,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:51:31,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-12-13 17:51:31,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:51:31,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-12-13 17:51:31,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=2475, Unknown=0, NotChecked=0, Total=3080 [2022-12-13 17:51:31,432 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 56 states, 56 states have (on average 2.2142857142857144) internal successors, (124), 56 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:51:40,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:51:40,353 INFO L93 Difference]: Finished difference Result 922 states and 953 transitions. [2022-12-13 17:51:40,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-12-13 17:51:40,353 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.2142857142857144) internal successors, (124), 56 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-12-13 17:51:40,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:51:40,354 INFO L225 Difference]: With dead ends: 922 [2022-12-13 17:51:40,354 INFO L226 Difference]: Without dead ends: 873 [2022-12-13 17:51:40,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 82 SyntacticMatches, 31 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5194 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2242, Invalid=10640, Unknown=0, NotChecked=0, Total=12882 [2022-12-13 17:51:40,355 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 651 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:51:40,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 371 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:51:40,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2022-12-13 17:51:41,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 97. [2022-12-13 17:51:41,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:51:41,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-12-13 17:51:41,110 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-12-13 17:51:41,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:51:41,110 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-12-13 17:51:41,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.2142857142857144) internal successors, (124), 56 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:51:41,110 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-12-13 17:51:41,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-13 17:51:41,110 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:51:41,110 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:51:41,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-12-13 17:51:41,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:51:41,311 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:51:41,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:51:41,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1129988419, now seen corresponding path program 14 times [2022-12-13 17:51:41,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:51:41,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681786683] [2022-12-13 17:51:41,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:51:41,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:51:41,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:51:41,708 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 261 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:51:41,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:51:41,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681786683] [2022-12-13 17:51:41,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681786683] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:51:41,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052912808] [2022-12-13 17:51:41,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:51:41,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:51:41,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:51:41,709 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:51:41,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-12-13 17:51:41,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:51:41,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:51:41,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 17:51:41,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:51:42,283 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:51:42,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:51:42,557 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:51:42,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052912808] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:51:42,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:51:42,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 55 [2022-12-13 17:51:42,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175775485] [2022-12-13 17:51:42,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:51:42,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-13 17:51:42,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:51:42,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-13 17:51:42,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=2359, Unknown=0, NotChecked=0, Total=2970 [2022-12-13 17:51:42,558 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 55 states, 55 states have (on average 2.2363636363636363) internal successors, (123), 55 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:51:52,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:51:52,257 INFO L93 Difference]: Finished difference Result 973 states and 1006 transitions. [2022-12-13 17:51:52,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-12-13 17:51:52,257 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.2363636363636363) internal successors, (123), 55 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-12-13 17:51:52,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:51:52,258 INFO L225 Difference]: With dead ends: 973 [2022-12-13 17:51:52,258 INFO L226 Difference]: Without dead ends: 924 [2022-12-13 17:51:52,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 83 SyntacticMatches, 31 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3971 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1841, Invalid=8259, Unknown=0, NotChecked=0, Total=10100 [2022-12-13 17:51:52,259 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 511 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:51:52,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 356 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:51:52,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-12-13 17:51:52,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 99. [2022-12-13 17:51:52,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.183673469387755) internal successors, (116), 98 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:51:52,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2022-12-13 17:51:52,938 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 67 [2022-12-13 17:51:52,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:51:52,938 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2022-12-13 17:51:52,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.2363636363636363) internal successors, (123), 55 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:51:52,938 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2022-12-13 17:51:52,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-13 17:51:52,939 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:51:52,939 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:51:52,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-12-13 17:51:53,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-12-13 17:51:53,140 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:51:53,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:51:53,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1945821609, now seen corresponding path program 28 times [2022-12-13 17:51:53,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:51:53,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133844145] [2022-12-13 17:51:53,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:51:53,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:51:53,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:51:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 105 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:51:53,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:51:53,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133844145] [2022-12-13 17:51:53,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133844145] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:51:53,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857335081] [2022-12-13 17:51:53,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:51:53,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:51:53,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:51:53,352 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:51:53,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-12-13 17:51:53,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:51:53,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:51:53,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 17:51:53,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:51:53,464 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:51:53,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:51:53,669 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:51:53,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857335081] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:51:53,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:51:53,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 21 [2022-12-13 17:51:53,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420126105] [2022-12-13 17:51:53,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:51:53,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 17:51:53,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:51:53,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 17:51:53,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2022-12-13 17:51:53,670 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:51:54,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:51:54,755 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2022-12-13 17:51:54,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 17:51:54,756 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 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 68 [2022-12-13 17:51:54,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:51:54,756 INFO L225 Difference]: With dead ends: 110 [2022-12-13 17:51:54,756 INFO L226 Difference]: Without dead ends: 108 [2022-12-13 17:51:54,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 118 SyntacticMatches, 30 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=501, Invalid=905, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 17:51:54,756 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 68 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:51:54,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 242 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:51:54,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-12-13 17:51:55,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 102. [2022-12-13 17:51:55,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 101 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:51:55,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 119 transitions. [2022-12-13 17:51:55,466 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 119 transitions. Word has length 68 [2022-12-13 17:51:55,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:51:55,466 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 119 transitions. [2022-12-13 17:51:55,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:51:55,466 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 119 transitions. [2022-12-13 17:51:55,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-13 17:51:55,466 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:51:55,466 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:51:55,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-12-13 17:51:55,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-12-13 17:51:55,667 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:51:55,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:51:55,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1206883513, now seen corresponding path program 29 times [2022-12-13 17:51:55,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:51:55,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292259675] [2022-12-13 17:51:55,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:51:55,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:51:55,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:51:56,144 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 302 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:51:56,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:51:56,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292259675] [2022-12-13 17:51:56,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292259675] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:51:56,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177297259] [2022-12-13 17:51:56,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:51:56,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:51:56,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:51:56,146 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:51:56,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-12-13 17:51:56,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-12-13 17:51:56,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:51:56,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 17:51:56,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:51:56,957 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:51:56,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:51:57,262 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:51:57,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177297259] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:51:57,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:51:57,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 73 [2022-12-13 17:51:57,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483059330] [2022-12-13 17:51:57,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:51:57,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-12-13 17:51:57,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:51:57,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-12-13 17:51:57,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=997, Invalid=4259, Unknown=0, NotChecked=0, Total=5256 [2022-12-13 17:51:57,264 INFO L87 Difference]: Start difference. First operand 102 states and 119 transitions. Second operand has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:51:59,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:51:59,671 INFO L93 Difference]: Finished difference Result 220 states and 239 transitions. [2022-12-13 17:51:59,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 17:51:59,672 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 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 71 [2022-12-13 17:51:59,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:51:59,672 INFO L225 Difference]: With dead ends: 220 [2022-12-13 17:51:59,672 INFO L226 Difference]: Without dead ends: 168 [2022-12-13 17:51:59,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 73 SyntacticMatches, 33 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5996 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2072, Invalid=9270, Unknown=0, NotChecked=0, Total=11342 [2022-12-13 17:51:59,673 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 56 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:51:59,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 308 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:51:59,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-12-13 17:52:00,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 103. [2022-12-13 17:52:00,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:00,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-12-13 17:52:00,417 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-12-13 17:52:00,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:52:00,417 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-12-13 17:52:00,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:00,417 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-12-13 17:52:00,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-13 17:52:00,417 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:52:00,418 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:52:00,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-12-13 17:52:00,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:52:00,618 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:52:00,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:52:00,619 INFO L85 PathProgramCache]: Analyzing trace with hash -962976904, now seen corresponding path program 92 times [2022-12-13 17:52:00,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:52:00,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150859484] [2022-12-13 17:52:00,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:52:00,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:52:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:01,098 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 302 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:01,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:52:01,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150859484] [2022-12-13 17:52:01,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150859484] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:52:01,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225909652] [2022-12-13 17:52:01,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:52:01,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:52:01,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:52:01,100 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:52:01,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-12-13 17:52:01,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:52:01,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:52:01,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 17:52:01,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:52:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 345 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:01,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:52:02,020 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 345 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:02,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225909652] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:52:02,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:52:02,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 72 [2022-12-13 17:52:02,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721361311] [2022-12-13 17:52:02,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:52:02,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-12-13 17:52:02,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:52:02,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-12-13 17:52:02,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=4164, Unknown=0, NotChecked=0, Total=5112 [2022-12-13 17:52:02,021 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 72 states, 72 states have (on average 2.0) internal successors, (144), 72 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) [2022-12-13 17:52:05,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:52:05,244 INFO L93 Difference]: Finished difference Result 285 states and 305 transitions. [2022-12-13 17:52:05,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-13 17:52:05,244 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0) internal successors, (144), 72 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 71 [2022-12-13 17:52:05,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:52:05,244 INFO L225 Difference]: With dead ends: 285 [2022-12-13 17:52:05,244 INFO L226 Difference]: Without dead ends: 233 [2022-12-13 17:52:05,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 74 SyntacticMatches, 33 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7058 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2530, Invalid=11990, Unknown=0, NotChecked=0, Total=14520 [2022-12-13 17:52:05,245 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 114 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:52:05,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 377 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:52:05,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-12-13 17:52:06,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 103. [2022-12-13 17:52:06,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:06,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-12-13 17:52:06,024 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-12-13 17:52:06,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:52:06,024 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-12-13 17:52:06,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0) internal successors, (144), 72 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) [2022-12-13 17:52:06,024 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-12-13 17:52:06,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-13 17:52:06,024 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:52:06,025 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:52:06,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-12-13 17:52:06,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-12-13 17:52:06,226 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:52:06,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:52:06,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1460879577, now seen corresponding path program 93 times [2022-12-13 17:52:06,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:52:06,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773861815] [2022-12-13 17:52:06,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:52:06,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:52:06,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:06,634 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 302 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:06,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:52:06,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773861815] [2022-12-13 17:52:06,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773861815] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:52:06,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138477739] [2022-12-13 17:52:06,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:52:06,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:52:06,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:52:06,635 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:52:06,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-12-13 17:52:06,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-12-13 17:52:06,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:52:06,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 17:52:06,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:52:07,328 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 345 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:07,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:52:07,633 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 345 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:07,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138477739] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:52:07,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:52:07,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 71 [2022-12-13 17:52:07,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021525790] [2022-12-13 17:52:07,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:52:07,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-12-13 17:52:07,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:52:07,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-12-13 17:52:07,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=4067, Unknown=0, NotChecked=0, Total=4970 [2022-12-13 17:52:07,634 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 71 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:11,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:52:11,807 INFO L93 Difference]: Finished difference Result 349 states and 370 transitions. [2022-12-13 17:52:11,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-12-13 17:52:11,807 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 71 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-12-13 17:52:11,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:52:11,808 INFO L225 Difference]: With dead ends: 349 [2022-12-13 17:52:11,808 INFO L226 Difference]: Without dead ends: 297 [2022-12-13 17:52:11,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 75 SyntacticMatches, 33 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8102 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3015, Invalid=14541, Unknown=0, NotChecked=0, Total=17556 [2022-12-13 17:52:11,809 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 168 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:52:11,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 345 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:52:11,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-12-13 17:52:12,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 103. [2022-12-13 17:52:12,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:12,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-12-13 17:52:12,609 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-12-13 17:52:12,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:52:12,609 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-12-13 17:52:12,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 71 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:12,609 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-12-13 17:52:12,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-13 17:52:12,609 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:52:12,609 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:52:12,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-12-13 17:52:12,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2022-12-13 17:52:12,810 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:52:12,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:52:12,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1816163160, now seen corresponding path program 94 times [2022-12-13 17:52:12,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:52:12,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357578717] [2022-12-13 17:52:12,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:52:12,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:52:12,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:13,207 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 302 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:13,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:52:13,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357578717] [2022-12-13 17:52:13,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357578717] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:52:13,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688422080] [2022-12-13 17:52:13,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:52:13,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:52:13,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:52:13,208 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:52:13,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-12-13 17:52:13,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:52:13,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:52:13,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 17:52:13,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:52:13,955 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 345 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:13,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:52:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 345 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:14,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688422080] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:52:14,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:52:14,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 70 [2022-12-13 17:52:14,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462973232] [2022-12-13 17:52:14,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:52:14,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-12-13 17:52:14,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:52:14,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-12-13 17:52:14,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=862, Invalid=3968, Unknown=0, NotChecked=0, Total=4830 [2022-12-13 17:52:14,313 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 70 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:19,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:52:19,504 INFO L93 Difference]: Finished difference Result 412 states and 434 transitions. [2022-12-13 17:52:19,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-12-13 17:52:19,504 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 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 71 [2022-12-13 17:52:19,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:52:19,504 INFO L225 Difference]: With dead ends: 412 [2022-12-13 17:52:19,504 INFO L226 Difference]: Without dead ends: 360 [2022-12-13 17:52:19,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 76 SyntacticMatches, 33 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9065 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3474, Invalid=16832, Unknown=0, NotChecked=0, Total=20306 [2022-12-13 17:52:19,505 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 187 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:52:19,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 408 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:52:19,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-12-13 17:52:20,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 103. [2022-12-13 17:52:20,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:20,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-12-13 17:52:20,332 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-12-13 17:52:20,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:52:20,333 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-12-13 17:52:20,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:20,333 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-12-13 17:52:20,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-13 17:52:20,333 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:52:20,333 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:52:20,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-12-13 17:52:20,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-12-13 17:52:20,534 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:52:20,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:52:20,535 INFO L85 PathProgramCache]: Analyzing trace with hash 2104718585, now seen corresponding path program 95 times [2022-12-13 17:52:20,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:52:20,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895571271] [2022-12-13 17:52:20,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:52:20,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:52:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:20,950 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 302 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:20,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:52:20,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895571271] [2022-12-13 17:52:20,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895571271] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:52:20,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974375388] [2022-12-13 17:52:20,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:52:20,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:52:20,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:52:20,952 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:52:20,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-12-13 17:52:21,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-12-13 17:52:21,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:52:21,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 17:52:21,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:52:21,627 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 345 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:21,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:52:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 345 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:21,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974375388] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:52:21,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:52:21,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 69 [2022-12-13 17:52:21,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975032251] [2022-12-13 17:52:21,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:52:21,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-12-13 17:52:21,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:52:21,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-12-13 17:52:21,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=3867, Unknown=0, NotChecked=0, Total=4692 [2022-12-13 17:52:21,950 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:28,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:52:28,229 INFO L93 Difference]: Finished difference Result 474 states and 497 transitions. [2022-12-13 17:52:28,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-12-13 17:52:28,229 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-12-13 17:52:28,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:52:28,230 INFO L225 Difference]: With dead ends: 474 [2022-12-13 17:52:28,230 INFO L226 Difference]: Without dead ends: 422 [2022-12-13 17:52:28,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 77 SyntacticMatches, 33 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9902 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3877, Invalid=18773, Unknown=0, NotChecked=0, Total=22650 [2022-12-13 17:52:28,231 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 220 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:52:28,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 389 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:52:28,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-12-13 17:52:29,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 103. [2022-12-13 17:52:29,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:29,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-12-13 17:52:29,081 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-12-13 17:52:29,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:52:29,081 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-12-13 17:52:29,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:29,081 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-12-13 17:52:29,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-13 17:52:29,081 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:52:29,081 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:52:29,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-12-13 17:52:29,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-12-13 17:52:29,282 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:52:29,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:52:29,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1559837496, now seen corresponding path program 96 times [2022-12-13 17:52:29,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:52:29,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534008471] [2022-12-13 17:52:29,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:52:29,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:52:29,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 302 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:29,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:52:29,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534008471] [2022-12-13 17:52:29,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534008471] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:52:29,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654461397] [2022-12-13 17:52:29,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:52:29,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:52:29,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:52:29,644 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:52:29,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-12-13 17:52:29,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-12-13 17:52:29,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:52:29,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 17:52:29,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:52:30,314 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 345 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:30,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:52:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 345 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:30,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654461397] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:52:30,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:52:30,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 68 [2022-12-13 17:52:30,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734615023] [2022-12-13 17:52:30,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:52:30,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-13 17:52:30,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:52:30,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-13 17:52:30,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=792, Invalid=3764, Unknown=0, NotChecked=0, Total=4556 [2022-12-13 17:52:30,596 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:37,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:52:37,610 INFO L93 Difference]: Finished difference Result 535 states and 559 transitions. [2022-12-13 17:52:37,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-12-13 17:52:37,611 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 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 71 [2022-12-13 17:52:37,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:52:37,611 INFO L225 Difference]: With dead ends: 535 [2022-12-13 17:52:37,611 INFO L226 Difference]: Without dead ends: 483 [2022-12-13 17:52:37,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 78 SyntacticMatches, 33 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10563 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4200, Invalid=20292, Unknown=0, NotChecked=0, Total=24492 [2022-12-13 17:52:37,612 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 285 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:52:37,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 403 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:52:37,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-12-13 17:52:38,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 103. [2022-12-13 17:52:38,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:38,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-12-13 17:52:38,475 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-12-13 17:52:38,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:52:38,475 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-12-13 17:52:38,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:38,475 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-12-13 17:52:38,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-13 17:52:38,475 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:52:38,475 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:52:38,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-12-13 17:52:38,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:52:38,676 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:52:38,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:52:38,677 INFO L85 PathProgramCache]: Analyzing trace with hash -258854631, now seen corresponding path program 97 times [2022-12-13 17:52:38,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:52:38,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440534255] [2022-12-13 17:52:38,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:52:38,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:52:38,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:39,060 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 302 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:39,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:52:39,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440534255] [2022-12-13 17:52:39,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440534255] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:52:39,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624380649] [2022-12-13 17:52:39,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:52:39,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:52:39,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:52:39,061 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:52:39,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-12-13 17:52:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:39,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 17:52:39,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:52:39,633 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 345 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:39,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:52:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 345 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:39,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624380649] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:52:39,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:52:39,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 67 [2022-12-13 17:52:39,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137801496] [2022-12-13 17:52:39,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:52:39,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-12-13 17:52:39,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:52:39,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-12-13 17:52:39,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=763, Invalid=3659, Unknown=0, NotChecked=0, Total=4422 [2022-12-13 17:52:39,901 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 67 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:47,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:52:47,395 INFO L93 Difference]: Finished difference Result 595 states and 620 transitions. [2022-12-13 17:52:47,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-12-13 17:52:47,395 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 67 states have internal predecessors, (139), 0 states have call successors, (0), 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 71 [2022-12-13 17:52:47,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:52:47,396 INFO L225 Difference]: With dead ends: 595 [2022-12-13 17:52:47,396 INFO L226 Difference]: Without dead ends: 543 [2022-12-13 17:52:47,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 79 SyntacticMatches, 33 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11010 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4425, Invalid=21335, Unknown=0, NotChecked=0, Total=25760 [2022-12-13 17:52:47,397 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 504 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:52:47,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 263 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:52:47,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-12-13 17:52:48,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 103. [2022-12-13 17:52:48,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:48,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-12-13 17:52:48,292 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-12-13 17:52:48,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:52:48,292 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-12-13 17:52:48,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 67 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:48,292 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-12-13 17:52:48,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-13 17:52:48,292 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:52:48,292 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:52:48,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-12-13 17:52:48,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:52:48,493 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:52:48,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:52:48,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1425900776, now seen corresponding path program 98 times [2022-12-13 17:52:48,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:52:48,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797384365] [2022-12-13 17:52:48,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:52:48,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:52:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:52:48,885 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 302 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:48,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:52:48,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797384365] [2022-12-13 17:52:48,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797384365] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:52:48,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3462631] [2022-12-13 17:52:48,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:52:48,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:52:48,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:52:48,887 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:52:48,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-12-13 17:52:48,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:52:48,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:52:48,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 17:52:48,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:52:49,693 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 345 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:49,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:52:50,026 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 345 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:52:50,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3462631] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:52:50,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:52:50,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 66 [2022-12-13 17:52:50,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985336905] [2022-12-13 17:52:50,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:52:50,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-12-13 17:52:50,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:52:50,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-12-13 17:52:50,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=738, Invalid=3552, Unknown=0, NotChecked=0, Total=4290 [2022-12-13 17:52:50,027 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:59,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:52:59,394 INFO L93 Difference]: Finished difference Result 654 states and 680 transitions. [2022-12-13 17:52:59,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-12-13 17:52:59,394 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 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 71 [2022-12-13 17:52:59,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:52:59,395 INFO L225 Difference]: With dead ends: 654 [2022-12-13 17:52:59,395 INFO L226 Difference]: Without dead ends: 602 [2022-12-13 17:52:59,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 80 SyntacticMatches, 33 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11217 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4540, Invalid=21866, Unknown=0, NotChecked=0, Total=26406 [2022-12-13 17:52:59,396 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 340 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:52:59,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 391 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:52:59,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2022-12-13 17:53:00,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 103. [2022-12-13 17:53:00,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:00,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-12-13 17:53:00,257 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-12-13 17:53:00,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:53:00,257 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-12-13 17:53:00,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:00,257 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-12-13 17:53:00,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-13 17:53:00,257 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:53:00,257 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:53:00,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-12-13 17:53:00,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:53:00,459 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:53:00,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:53:00,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1584493881, now seen corresponding path program 99 times [2022-12-13 17:53:00,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:53:00,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238328858] [2022-12-13 17:53:00,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:00,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:53:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:00,901 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 302 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:53:00,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:53:00,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238328858] [2022-12-13 17:53:00,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238328858] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:53:00,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677957590] [2022-12-13 17:53:00,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:53:00,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:53:00,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:53:00,902 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:53:00,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-12-13 17:53:00,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-12-13 17:53:00,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:53:00,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 17:53:00,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:53:01,593 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 345 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:53:01,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:53:01,934 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 345 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:53:01,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677957590] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:53:01,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:53:01,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 65 [2022-12-13 17:53:01,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270713937] [2022-12-13 17:53:01,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:53:01,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-12-13 17:53:01,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:53:01,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-12-13 17:53:01,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=717, Invalid=3443, Unknown=0, NotChecked=0, Total=4160 [2022-12-13 17:53:01,936 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:11,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:53:11,154 INFO L93 Difference]: Finished difference Result 712 states and 739 transitions. [2022-12-13 17:53:11,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-12-13 17:53:11,154 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 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 71 [2022-12-13 17:53:11,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:53:11,155 INFO L225 Difference]: With dead ends: 712 [2022-12-13 17:53:11,155 INFO L226 Difference]: Without dead ends: 660 [2022-12-13 17:53:11,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 81 SyntacticMatches, 33 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11170 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4539, Invalid=21867, Unknown=0, NotChecked=0, Total=26406 [2022-12-13 17:53:11,156 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 382 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:53:11,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 391 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:53:11,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-12-13 17:53:12,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 103. [2022-12-13 17:53:12,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:12,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-12-13 17:53:12,025 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-12-13 17:53:12,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:53:12,025 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-12-13 17:53:12,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:12,026 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-12-13 17:53:12,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-13 17:53:12,026 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:53:12,026 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:53:12,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-12-13 17:53:12,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:53:12,227 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:53:12,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:53:12,228 INFO L85 PathProgramCache]: Analyzing trace with hash -535153928, now seen corresponding path program 100 times [2022-12-13 17:53:12,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:53:12,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215687287] [2022-12-13 17:53:12,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:12,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:53:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:12,694 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 302 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:53:12,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:53:12,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215687287] [2022-12-13 17:53:12,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215687287] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:53:12,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484695270] [2022-12-13 17:53:12,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:53:12,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:53:12,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:53:12,695 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:53:12,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-12-13 17:53:12,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:53:12,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:53:12,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 17:53:12,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:53:13,295 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 345 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:53:13,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:53:13,661 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 345 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:53:13,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484695270] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:53:13,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:53:13,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 64 [2022-12-13 17:53:13,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723392160] [2022-12-13 17:53:13,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:53:13,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-13 17:53:13,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:53:13,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-13 17:53:13,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=700, Invalid=3332, Unknown=0, NotChecked=0, Total=4032 [2022-12-13 17:53:13,662 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 64 states, 64 states have (on average 2.125) internal successors, (136), 64 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:23,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:53:23,290 INFO L93 Difference]: Finished difference Result 769 states and 797 transitions. [2022-12-13 17:53:23,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-12-13 17:53:23,290 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.125) internal successors, (136), 64 states have internal predecessors, (136), 0 states have call successors, (0), 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 71 [2022-12-13 17:53:23,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:53:23,291 INFO L225 Difference]: With dead ends: 769 [2022-12-13 17:53:23,291 INFO L226 Difference]: Without dead ends: 717 [2022-12-13 17:53:23,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 82 SyntacticMatches, 33 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10863 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4422, Invalid=21338, Unknown=0, NotChecked=0, Total=25760 [2022-12-13 17:53:23,292 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 553 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:53:23,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 374 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:53:23,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-12-13 17:53:24,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 103. [2022-12-13 17:53:24,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:24,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-12-13 17:53:24,168 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-12-13 17:53:24,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:53:24,168 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-12-13 17:53:24,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.125) internal successors, (136), 64 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:24,169 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-12-13 17:53:24,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-13 17:53:24,169 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:53:24,169 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:53:24,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-12-13 17:53:24,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:53:24,370 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:53:24,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:53:24,371 INFO L85 PathProgramCache]: Analyzing trace with hash 227754329, now seen corresponding path program 101 times [2022-12-13 17:53:24,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:53:24,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497182555] [2022-12-13 17:53:24,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:24,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:53:24,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:24,748 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 302 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:53:24,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:53:24,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497182555] [2022-12-13 17:53:24,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497182555] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:53:24,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390099318] [2022-12-13 17:53:24,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:53:24,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:53:24,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:53:24,750 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:53:24,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-12-13 17:53:24,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-12-13 17:53:24,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:53:24,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 17:53:24,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:53:25,353 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 345 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:53:25,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:53:25,623 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 345 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:53:25,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390099318] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:53:25,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:53:25,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 63 [2022-12-13 17:53:25,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538892579] [2022-12-13 17:53:25,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:53:25,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-13 17:53:25,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:53:25,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-13 17:53:25,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=687, Invalid=3219, Unknown=0, NotChecked=0, Total=3906 [2022-12-13 17:53:25,624 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 63 states, 63 states have (on average 2.142857142857143) internal successors, (135), 63 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:35,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:53:35,515 INFO L93 Difference]: Finished difference Result 825 states and 854 transitions. [2022-12-13 17:53:35,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-12-13 17:53:35,515 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.142857142857143) internal successors, (135), 63 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-12-13 17:53:35,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:53:35,516 INFO L225 Difference]: With dead ends: 825 [2022-12-13 17:53:35,516 INFO L226 Difference]: Without dead ends: 773 [2022-12-13 17:53:35,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 83 SyntacticMatches, 33 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10298 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4195, Invalid=20297, Unknown=0, NotChecked=0, Total=24492 [2022-12-13 17:53:35,517 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 560 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:53:35,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 384 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:53:35,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-12-13 17:53:36,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 103. [2022-12-13 17:53:36,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:36,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-12-13 17:53:36,456 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-12-13 17:53:36,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:53:36,457 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-12-13 17:53:36,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.142857142857143) internal successors, (135), 63 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:36,457 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-12-13 17:53:36,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-13 17:53:36,457 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:53:36,457 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:53:36,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-12-13 17:53:36,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-12-13 17:53:36,658 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:53:36,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:53:36,659 INFO L85 PathProgramCache]: Analyzing trace with hash -578919720, now seen corresponding path program 102 times [2022-12-13 17:53:36,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:53:36,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772790637] [2022-12-13 17:53:36,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:36,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:53:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:37,040 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 302 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:53:37,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:53:37,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772790637] [2022-12-13 17:53:37,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772790637] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:53:37,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587312467] [2022-12-13 17:53:37,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:53:37,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:53:37,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:53:37,041 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:53:37,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-12-13 17:53:37,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-12-13 17:53:37,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:53:37,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 17:53:37,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:53:37,688 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 345 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:53:37,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:53:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 345 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:53:38,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587312467] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:53:38,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:53:38,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 62 [2022-12-13 17:53:38,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792354049] [2022-12-13 17:53:38,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:53:38,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-12-13 17:53:38,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:53:38,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-12-13 17:53:38,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=3104, Unknown=0, NotChecked=0, Total=3782 [2022-12-13 17:53:38,094 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 62 states, 62 states have (on average 2.161290322580645) internal successors, (134), 62 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:48,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:53:48,582 INFO L93 Difference]: Finished difference Result 880 states and 910 transitions. [2022-12-13 17:53:48,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-12-13 17:53:48,582 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.161290322580645) internal successors, (134), 62 states have internal predecessors, (134), 0 states have call successors, (0), 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 71 [2022-12-13 17:53:48,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:53:48,583 INFO L225 Difference]: With dead ends: 880 [2022-12-13 17:53:48,583 INFO L226 Difference]: Without dead ends: 828 [2022-12-13 17:53:48,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 84 SyntacticMatches, 33 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9489 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3870, Invalid=18780, Unknown=0, NotChecked=0, Total=22650 [2022-12-13 17:53:48,585 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 564 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:53:48,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 398 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:53:48,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-12-13 17:53:49,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 103. [2022-12-13 17:53:49,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:49,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-12-13 17:53:49,475 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-12-13 17:53:49,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:53:49,475 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-12-13 17:53:49,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.161290322580645) internal successors, (134), 62 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:49,476 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-12-13 17:53:49,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-13 17:53:49,476 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:53:49,476 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:53:49,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-12-13 17:53:49,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-12-13 17:53:49,677 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:53:49,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:53:49,678 INFO L85 PathProgramCache]: Analyzing trace with hash -50752135, now seen corresponding path program 103 times [2022-12-13 17:53:49,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:53:49,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838663556] [2022-12-13 17:53:49,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:49,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:53:49,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:50,172 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 302 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:53:50,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:53:50,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838663556] [2022-12-13 17:53:50,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838663556] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:53:50,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778703601] [2022-12-13 17:53:50,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:53:50,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:53:50,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:53:50,174 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:53:50,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-12-13 17:53:50,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:50,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 17:53:50,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:53:50,821 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 345 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:53:50,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:53:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 345 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:53:51,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778703601] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:53:51,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:53:51,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 61 [2022-12-13 17:53:51,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104373505] [2022-12-13 17:53:51,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:53:51,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-12-13 17:53:51,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:53:51,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-12-13 17:53:51,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=2987, Unknown=0, NotChecked=0, Total=3660 [2022-12-13 17:53:51,100 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 61 states, 61 states have (on average 2.180327868852459) internal successors, (133), 61 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:01,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:54:01,647 INFO L93 Difference]: Finished difference Result 934 states and 965 transitions. [2022-12-13 17:54:01,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-12-13 17:54:01,648 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.180327868852459) internal successors, (133), 61 states have internal predecessors, (133), 0 states have call successors, (0), 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 71 [2022-12-13 17:54:01,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:54:01,649 INFO L225 Difference]: With dead ends: 934 [2022-12-13 17:54:01,649 INFO L226 Difference]: Without dead ends: 882 [2022-12-13 17:54:01,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 85 SyntacticMatches, 33 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8462 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3465, Invalid=16841, Unknown=0, NotChecked=0, Total=20306 [2022-12-13 17:54:01,651 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 592 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:54:01,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 425 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:54:01,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2022-12-13 17:54:02,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 103. [2022-12-13 17:54:02,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:02,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-12-13 17:54:02,594 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-12-13 17:54:02,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:54:02,594 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-12-13 17:54:02,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.180327868852459) internal successors, (133), 61 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:02,594 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-12-13 17:54:02,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-13 17:54:02,595 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:54:02,595 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:02,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-12-13 17:54:02,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-12-13 17:54:02,796 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:54:02,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:02,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1142093128, now seen corresponding path program 104 times [2022-12-13 17:54:02,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:02,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63459886] [2022-12-13 17:54:02,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:02,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 302 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:03,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:03,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63459886] [2022-12-13 17:54:03,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63459886] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:54:03,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789930943] [2022-12-13 17:54:03,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:54:03,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:54:03,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:54:03,197 INFO L229 MonitoredProcess]: Starting monitored process 149 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:54:03,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-12-13 17:54:03,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:54:03,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:54:03,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 17:54:03,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:54:03,721 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 345 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:03,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:54:03,985 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 345 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:03,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789930943] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:54:03,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:54:03,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 60 [2022-12-13 17:54:03,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157352357] [2022-12-13 17:54:03,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:54:03,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-12-13 17:54:03,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:03,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-12-13 17:54:03,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=2868, Unknown=0, NotChecked=0, Total=3540 [2022-12-13 17:54:03,986 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 60 states, 60 states have (on average 2.2) internal successors, (132), 60 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:15,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:54:15,448 INFO L93 Difference]: Finished difference Result 987 states and 1019 transitions. [2022-12-13 17:54:15,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-12-13 17:54:15,448 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.2) internal successors, (132), 60 states have internal predecessors, (132), 0 states have call successors, (0), 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 71 [2022-12-13 17:54:15,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:54:15,449 INFO L225 Difference]: With dead ends: 987 [2022-12-13 17:54:15,449 INFO L226 Difference]: Without dead ends: 935 [2022-12-13 17:54:15,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 86 SyntacticMatches, 33 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7255 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3004, Invalid=14552, Unknown=0, NotChecked=0, Total=17556 [2022-12-13 17:54:15,450 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 659 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 17:54:15,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [659 Valid, 423 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 17:54:15,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2022-12-13 17:54:16,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 103. [2022-12-13 17:54:16,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:16,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-12-13 17:54:16,363 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-12-13 17:54:16,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:54:16,363 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-12-13 17:54:16,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.2) internal successors, (132), 60 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:16,363 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-12-13 17:54:16,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-13 17:54:16,363 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:54:16,363 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:16,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-12-13 17:54:16,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,149 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:54:16,564 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:54:16,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:16,565 INFO L85 PathProgramCache]: Analyzing trace with hash 69628313, now seen corresponding path program 105 times [2022-12-13 17:54:16,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:16,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732141968] [2022-12-13 17:54:16,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:16,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:16,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:16,979 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 302 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:16,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:16,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732141968] [2022-12-13 17:54:16,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732141968] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:54:16,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771124581] [2022-12-13 17:54:16,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:54:16,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:54:16,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:54:16,980 INFO L229 MonitoredProcess]: Starting monitored process 150 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:54:16,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-12-13 17:54:17,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-12-13 17:54:17,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:54:17,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 17:54:17,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:54:17,589 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 345 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:17,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:54:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 345 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:17,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771124581] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:54:17,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:54:17,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 59 [2022-12-13 17:54:17,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582564481] [2022-12-13 17:54:17,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:54:17,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-12-13 17:54:17,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:17,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-12-13 17:54:17,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=2747, Unknown=0, NotChecked=0, Total=3422 [2022-12-13 17:54:17,930 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 59 states, 59 states have (on average 2.2203389830508473) internal successors, (131), 59 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:29,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:54:29,396 INFO L93 Difference]: Finished difference Result 1039 states and 1072 transitions. [2022-12-13 17:54:29,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-12-13 17:54:29,396 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.2203389830508473) internal successors, (131), 59 states have internal predecessors, (131), 0 states have call successors, (0), 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 71 [2022-12-13 17:54:29,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:54:29,397 INFO L225 Difference]: With dead ends: 1039 [2022-12-13 17:54:29,397 INFO L226 Difference]: Without dead ends: 987 [2022-12-13 17:54:29,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 87 SyntacticMatches, 33 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5884 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2517, Invalid=12003, Unknown=0, NotChecked=0, Total=14520 [2022-12-13 17:54:29,398 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 520 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 17:54:29,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 456 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 17:54:29,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2022-12-13 17:54:30,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 103. [2022-12-13 17:54:30,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:30,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-12-13 17:54:30,321 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-12-13 17:54:30,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:54:30,321 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-12-13 17:54:30,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.2203389830508473) internal successors, (131), 59 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:30,321 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-12-13 17:54:30,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-13 17:54:30,322 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:54:30,322 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:30,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-12-13 17:54:30,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2022-12-13 17:54:30,523 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:54:30,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:30,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1415304552, now seen corresponding path program 15 times [2022-12-13 17:54:30,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:30,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203635178] [2022-12-13 17:54:30,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:30,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 302 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:30,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:30,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203635178] [2022-12-13 17:54:30,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203635178] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:54:30,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480155085] [2022-12-13 17:54:30,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:54:30,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:54:30,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:54:30,918 INFO L229 MonitoredProcess]: Starting monitored process 151 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:54:30,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-12-13 17:54:30,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-12-13 17:54:30,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:54:30,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 17:54:30,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:54:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:31,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:54:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:31,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480155085] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:54:31,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:54:31,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 58 [2022-12-13 17:54:31,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150221997] [2022-12-13 17:54:31,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:54:31,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-12-13 17:54:31,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:31,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-12-13 17:54:31,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=682, Invalid=2624, Unknown=0, NotChecked=0, Total=3306 [2022-12-13 17:54:31,672 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 58 states, 58 states have (on average 2.2413793103448274) internal successors, (130), 58 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:43,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:54:43,405 INFO L93 Difference]: Finished difference Result 1093 states and 1128 transitions. [2022-12-13 17:54:43,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-12-13 17:54:43,406 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.2413793103448274) internal successors, (130), 58 states have internal predecessors, (130), 0 states have call successors, (0), 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 71 [2022-12-13 17:54:43,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:54:43,407 INFO L225 Difference]: With dead ends: 1093 [2022-12-13 17:54:43,407 INFO L226 Difference]: Without dead ends: 1041 [2022-12-13 17:54:43,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 88 SyntacticMatches, 33 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4484 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2057, Invalid=9285, Unknown=0, NotChecked=0, Total=11342 [2022-12-13 17:54:43,407 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 627 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:54:43,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 316 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:54:43,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2022-12-13 17:54:44,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 105. [2022-12-13 17:54:44,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 104 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:44,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2022-12-13 17:54:44,348 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 71 [2022-12-13 17:54:44,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:54:44,348 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2022-12-13 17:54:44,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.2413793103448274) internal successors, (130), 58 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:44,348 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2022-12-13 17:54:44,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-13 17:54:44,348 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:54:44,348 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:44,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-12-13 17:54:44,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2022-12-13 17:54:44,549 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:54:44,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:44,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1329099827, now seen corresponding path program 30 times [2022-12-13 17:54:44,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:44,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936988312] [2022-12-13 17:54:44,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:44,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:44,794 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 120 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:44,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:44,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936988312] [2022-12-13 17:54:44,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936988312] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:54:44,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035632843] [2022-12-13 17:54:44,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:54:44,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:54:44,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:54:44,795 INFO L229 MonitoredProcess]: Starting monitored process 152 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:54:44,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-12-13 17:54:44,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-12-13 17:54:44,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:54:44,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 17:54:44,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:54:44,912 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:44,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:54:45,100 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:45,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035632843] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:54:45,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:54:45,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 22 [2022-12-13 17:54:45,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439615476] [2022-12-13 17:54:45,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:54:45,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 17:54:45,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:45,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 17:54:45,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=283, Unknown=0, NotChecked=0, Total=462 [2022-12-13 17:54:45,101 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:46,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:54:46,471 INFO L93 Difference]: Finished difference Result 116 states and 134 transitions. [2022-12-13 17:54:46,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 17:54:46,471 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 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 72 [2022-12-13 17:54:46,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:54:46,472 INFO L225 Difference]: With dead ends: 116 [2022-12-13 17:54:46,472 INFO L226 Difference]: Without dead ends: 114 [2022-12-13 17:54:46,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 125 SyntacticMatches, 32 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=557, Invalid=1003, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 17:54:46,472 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 74 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:54:46,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 253 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:54:46,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-12-13 17:54:47,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2022-12-13 17:54:47,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.1775700934579438) internal successors, (126), 107 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:47,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 126 transitions. [2022-12-13 17:54:47,445 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 126 transitions. Word has length 72 [2022-12-13 17:54:47,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:54:47,445 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 126 transitions. [2022-12-13 17:54:47,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:47,445 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 126 transitions. [2022-12-13 17:54:47,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-13 17:54:47,445 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:54:47,445 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:47,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-12-13 17:54:47,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,152 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:54:47,646 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:54:47,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:47,647 INFO L85 PathProgramCache]: Analyzing trace with hash -85712547, now seen corresponding path program 31 times [2022-12-13 17:54:47,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:47,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669512514] [2022-12-13 17:54:47,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:47,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:48,232 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 346 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:48,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:48,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669512514] [2022-12-13 17:54:48,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669512514] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:54:48,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482183837] [2022-12-13 17:54:48,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:54:48,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:54:48,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:54:48,233 INFO L229 MonitoredProcess]: Starting monitored process 153 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:54:48,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-12-13 17:54:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:48,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 17:54:48,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:54:49,099 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:49,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:54:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:49,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482183837] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:54:49,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:54:49,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 77 [2022-12-13 17:54:49,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128790943] [2022-12-13 17:54:49,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:54:49,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-12-13 17:54:49,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:49,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-12-13 17:54:49,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1109, Invalid=4743, Unknown=0, NotChecked=0, Total=5852 [2022-12-13 17:54:49,489 INFO L87 Difference]: Start difference. First operand 108 states and 126 transitions. Second operand has 77 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 77 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:52,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:54:52,536 INFO L93 Difference]: Finished difference Result 233 states and 253 transitions. [2022-12-13 17:54:52,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 17:54:52,536 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 77 states have internal predecessors, (153), 0 states have call successors, (0), 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 75 [2022-12-13 17:54:52,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:54:52,536 INFO L225 Difference]: With dead ends: 233 [2022-12-13 17:54:52,536 INFO L226 Difference]: Without dead ends: 178 [2022-12-13 17:54:52,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 77 SyntacticMatches, 35 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6737 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2301, Invalid=10355, Unknown=0, NotChecked=0, Total=12656 [2022-12-13 17:54:52,537 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 57 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:54:52,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 345 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:54:52,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-12-13 17:54:53,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 109. [2022-12-13 17:54:53,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:53,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2022-12-13 17:54:53,576 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2022-12-13 17:54:53,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:54:53,576 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2022-12-13 17:54:53,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 77 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:54:53,576 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2022-12-13 17:54:53,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-13 17:54:53,576 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:54:53,576 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:54:53,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-12-13 17:54:53,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,153 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:54:53,777 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:54:53,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:54:53,778 INFO L85 PathProgramCache]: Analyzing trace with hash -266651492, now seen corresponding path program 106 times [2022-12-13 17:54:53,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:54:53,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800268938] [2022-12-13 17:54:53,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:54:53,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:54:53,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:54:54,243 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 346 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:54,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:54:54,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800268938] [2022-12-13 17:54:54,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800268938] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:54:54,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627787673] [2022-12-13 17:54:54,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:54:54,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:54:54,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:54:54,244 INFO L229 MonitoredProcess]: Starting monitored process 154 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:54:54,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-12-13 17:54:54,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:54:54,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:54:54,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 17:54:54,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:54:55,064 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 392 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:55,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:54:55,498 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 392 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:54:55,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627787673] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:54:55,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:54:55,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 76 [2022-12-13 17:54:55,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022839185] [2022-12-13 17:54:55,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:54:55,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-12-13 17:54:55,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:54:55,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-12-13 17:54:55,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1057, Invalid=4643, Unknown=0, NotChecked=0, Total=5700 [2022-12-13 17:54:55,500 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 76 states, 76 states have (on average 2.0) internal successors, (152), 76 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:55:00,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:55:00,384 INFO L93 Difference]: Finished difference Result 302 states and 323 transitions. [2022-12-13 17:55:00,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-12-13 17:55:00,384 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0) internal successors, (152), 76 states have internal predecessors, (152), 0 states have call successors, (0), 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 75 [2022-12-13 17:55:00,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:55:00,385 INFO L225 Difference]: With dead ends: 302 [2022-12-13 17:55:00,385 INFO L226 Difference]: Without dead ends: 247 [2022-12-13 17:55:00,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 78 SyntacticMatches, 35 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7951 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2822, Invalid=13434, Unknown=0, NotChecked=0, Total=16256 [2022-12-13 17:55:00,386 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 91 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:55:00,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 294 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:55:00,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-12-13 17:55:01,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 109. [2022-12-13 17:55:01,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:55:01,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2022-12-13 17:55:01,493 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2022-12-13 17:55:01,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:55:01,494 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2022-12-13 17:55:01,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.0) internal successors, (152), 76 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:55:01,494 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2022-12-13 17:55:01,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-13 17:55:01,494 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:55:01,494 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:55:01,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2022-12-13 17:55:01,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,154 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:55:01,695 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:55:01,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:55:01,696 INFO L85 PathProgramCache]: Analyzing trace with hash 974437757, now seen corresponding path program 107 times [2022-12-13 17:55:01,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:55:01,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790806687] [2022-12-13 17:55:01,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:55:01,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:55:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:55:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 346 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:55:02,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:55:02,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790806687] [2022-12-13 17:55:02,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790806687] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:55:02,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57925094] [2022-12-13 17:55:02,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:55:02,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:55:02,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:55:02,204 INFO L229 MonitoredProcess]: Starting monitored process 155 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:55:02,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-12-13 17:55:02,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-12-13 17:55:02,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:55:02,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 17:55:02,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:55:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 392 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:55:02,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:55:03,402 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 392 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:55:03,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57925094] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:55:03,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:55:03,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 75 [2022-12-13 17:55:03,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196169328] [2022-12-13 17:55:03,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:55:03,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-12-13 17:55:03,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:55:03,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-12-13 17:55:03,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1009, Invalid=4541, Unknown=0, NotChecked=0, Total=5550 [2022-12-13 17:55:03,404 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 75 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:55:09,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:55:09,063 INFO L93 Difference]: Finished difference Result 370 states and 392 transitions. [2022-12-13 17:55:09,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-12-13 17:55:09,064 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 75 states have internal predecessors, (151), 0 states have call successors, (0), 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 75 [2022-12-13 17:55:09,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:55:09,064 INFO L225 Difference]: With dead ends: 370 [2022-12-13 17:55:09,064 INFO L226 Difference]: Without dead ends: 315 [2022-12-13 17:55:09,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 79 SyntacticMatches, 35 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9162 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3380, Invalid=16360, Unknown=0, NotChecked=0, Total=19740 [2022-12-13 17:55:09,065 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 115 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:55:09,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 403 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:55:09,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-12-13 17:55:10,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 109. [2022-12-13 17:55:10,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:55:10,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2022-12-13 17:55:10,160 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2022-12-13 17:55:10,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:55:10,160 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2022-12-13 17:55:10,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 75 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:55:10,160 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2022-12-13 17:55:10,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-13 17:55:10,160 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:55:10,160 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:55:10,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-12-13 17:55:10,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,155 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:55:10,361 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:55:10,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:55:10,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1202284420, now seen corresponding path program 108 times [2022-12-13 17:55:10,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:55:10,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578062192] [2022-12-13 17:55:10,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:55:10,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:55:10,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:55:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 346 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:55:10,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:55:10,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578062192] [2022-12-13 17:55:10,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578062192] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:55:10,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487784879] [2022-12-13 17:55:10,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:55:10,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:55:10,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:55:10,797 INFO L229 MonitoredProcess]: Starting monitored process 156 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:55:10,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-12-13 17:55:10,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-12-13 17:55:10,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:55:10,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 17:55:10,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:55:11,622 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 392 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:55:11,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:55:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 392 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:55:11,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487784879] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:55:11,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:55:11,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 74 [2022-12-13 17:55:11,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415351629] [2022-12-13 17:55:11,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:55:11,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-12-13 17:55:11,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:55:11,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-12-13 17:55:11,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=965, Invalid=4437, Unknown=0, NotChecked=0, Total=5402 [2022-12-13 17:55:11,979 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 74 states, 74 states have (on average 2.027027027027027) internal successors, (150), 74 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) [2022-12-13 17:55:19,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:55:19,077 INFO L93 Difference]: Finished difference Result 437 states and 460 transitions. [2022-12-13 17:55:19,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-12-13 17:55:19,077 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.027027027027027) internal successors, (150), 74 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 75 [2022-12-13 17:55:19,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:55:19,077 INFO L225 Difference]: With dead ends: 437 [2022-12-13 17:55:19,078 INFO L226 Difference]: Without dead ends: 382 [2022-12-13 17:55:19,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 80 SyntacticMatches, 35 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10302 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3918, Invalid=19034, Unknown=0, NotChecked=0, Total=22952 [2022-12-13 17:55:19,079 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 193 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:55:19,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 365 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:55:19,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-12-13 17:55:20,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 109. [2022-12-13 17:55:20,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:55:20,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2022-12-13 17:55:20,203 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2022-12-13 17:55:20,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:55:20,203 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2022-12-13 17:55:20,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.027027027027027) internal successors, (150), 74 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) [2022-12-13 17:55:20,203 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2022-12-13 17:55:20,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-13 17:55:20,203 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:55:20,203 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:55:20,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-12-13 17:55:20,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-12-13 17:55:20,404 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:55:20,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:55:20,405 INFO L85 PathProgramCache]: Analyzing trace with hash 251519389, now seen corresponding path program 109 times [2022-12-13 17:55:20,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:55:20,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483545400] [2022-12-13 17:55:20,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:55:20,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:55:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:55:20,929 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 346 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:55:20,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:55:20,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483545400] [2022-12-13 17:55:20,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483545400] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:55:20,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783978929] [2022-12-13 17:55:20,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:55:20,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:55:20,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:55:20,930 INFO L229 MonitoredProcess]: Starting monitored process 157 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:55:20,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-12-13 17:55:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:55:20,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 17:55:20,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:55:21,826 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 392 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:55:21,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:55:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 392 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:55:22,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783978929] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:55:22,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:55:22,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 73 [2022-12-13 17:55:22,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643966190] [2022-12-13 17:55:22,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:55:22,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-12-13 17:55:22,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:55:22,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-12-13 17:55:22,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=925, Invalid=4331, Unknown=0, NotChecked=0, Total=5256 [2022-12-13 17:55:22,151 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 73 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:55:30,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:55:30,354 INFO L93 Difference]: Finished difference Result 503 states and 527 transitions. [2022-12-13 17:55:30,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-12-13 17:55:30,354 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-12-13 17:55:30,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:55:30,354 INFO L225 Difference]: With dead ends: 503 [2022-12-13 17:55:30,354 INFO L226 Difference]: Without dead ends: 448 [2022-12-13 17:55:30,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 81 SyntacticMatches, 35 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11321 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4403, Invalid=21357, Unknown=0, NotChecked=0, Total=25760 [2022-12-13 17:55:30,355 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 342 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:55:30,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 376 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:55:30,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-12-13 17:55:31,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 109. [2022-12-13 17:55:31,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:55:31,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2022-12-13 17:55:31,483 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2022-12-13 17:55:31,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:55:31,483 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2022-12-13 17:55:31,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:55:31,483 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2022-12-13 17:55:31,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-13 17:55:31,483 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:55:31,483 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:55:31,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-12-13 17:55:31,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-12-13 17:55:31,684 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:55:31,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:55:31,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1918341028, now seen corresponding path program 110 times [2022-12-13 17:55:31,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:55:31,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086135028] [2022-12-13 17:55:31,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:55:31,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:55:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:55:32,213 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 346 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:55:32,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:55:32,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086135028] [2022-12-13 17:55:32,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086135028] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:55:32,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551509688] [2022-12-13 17:55:32,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:55:32,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:55:32,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:55:32,214 INFO L229 MonitoredProcess]: Starting monitored process 158 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:55:32,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-12-13 17:55:32,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:55:32,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:55:32,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 17:55:32,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:55:33,100 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 392 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:55:33,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:55:33,575 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 392 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:55:33,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551509688] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:55:33,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:55:33,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 72 [2022-12-13 17:55:33,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56705194] [2022-12-13 17:55:33,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:55:33,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-12-13 17:55:33,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:55:33,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-12-13 17:55:33,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=889, Invalid=4223, Unknown=0, NotChecked=0, Total=5112 [2022-12-13 17:55:33,577 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 72 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:55:43,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:55:43,554 INFO L93 Difference]: Finished difference Result 568 states and 593 transitions. [2022-12-13 17:55:43,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-12-13 17:55:43,554 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 72 states have internal predecessors, (148), 0 states have call successors, (0), 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 75 [2022-12-13 17:55:43,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:55:43,554 INFO L225 Difference]: With dead ends: 568 [2022-12-13 17:55:43,554 INFO L226 Difference]: Without dead ends: 513 [2022-12-13 17:55:43,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 82 SyntacticMatches, 35 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12163 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4808, Invalid=23248, Unknown=0, NotChecked=0, Total=28056 [2022-12-13 17:55:43,556 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 317 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:55:43,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 380 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:55:43,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-12-13 17:55:44,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 109. [2022-12-13 17:55:44,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:55:44,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2022-12-13 17:55:44,704 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2022-12-13 17:55:44,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:55:44,705 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2022-12-13 17:55:44,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 72 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:55:44,705 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2022-12-13 17:55:44,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-13 17:55:44,705 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:55:44,705 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:55:44,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2022-12-13 17:55:44,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-12-13 17:55:44,906 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:55:44,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:55:44,907 INFO L85 PathProgramCache]: Analyzing trace with hash 505515453, now seen corresponding path program 111 times [2022-12-13 17:55:44,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:55:44,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699994572] [2022-12-13 17:55:44,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:55:44,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:55:44,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:55:45,342 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 346 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:55:45,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:55:45,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699994572] [2022-12-13 17:55:45,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699994572] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:55:45,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827530745] [2022-12-13 17:55:45,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:55:45,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:55:45,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:55:45,343 INFO L229 MonitoredProcess]: Starting monitored process 159 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:55:45,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-12-13 17:55:45,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-12-13 17:55:45,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:55:45,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 17:55:45,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:55:46,120 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 392 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:55:46,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:55:46,441 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 392 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:55:46,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827530745] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:55:46,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:55:46,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 71 [2022-12-13 17:55:46,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154936296] [2022-12-13 17:55:46,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:55:46,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-12-13 17:55:46,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:55:46,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-12-13 17:55:46,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=857, Invalid=4113, Unknown=0, NotChecked=0, Total=4970 [2022-12-13 17:55:46,443 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 71 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:55:57,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:55:57,202 INFO L93 Difference]: Finished difference Result 632 states and 658 transitions. [2022-12-13 17:55:57,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-12-13 17:55:57,202 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 71 states have internal predecessors, (147), 0 states have call successors, (0), 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 75 [2022-12-13 17:55:57,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:55:57,202 INFO L225 Difference]: With dead ends: 632 [2022-12-13 17:55:57,203 INFO L226 Difference]: Without dead ends: 577 [2022-12-13 17:55:57,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 83 SyntacticMatches, 35 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12784 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5112, Invalid=24644, Unknown=0, NotChecked=0, Total=29756 [2022-12-13 17:55:57,204 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 286 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 17:55:57,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 393 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 17:55:57,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-12-13 17:55:58,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 109. [2022-12-13 17:55:58,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:55:58,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2022-12-13 17:55:58,365 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2022-12-13 17:55:58,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:55:58,365 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2022-12-13 17:55:58,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 71 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:55:58,365 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2022-12-13 17:55:58,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-13 17:55:58,365 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:55:58,366 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:55:58,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2022-12-13 17:55:58,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-12-13 17:55:58,566 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:55:58,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:55:58,567 INFO L85 PathProgramCache]: Analyzing trace with hash 860799036, now seen corresponding path program 112 times [2022-12-13 17:55:58,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:55:58,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314880076] [2022-12-13 17:55:58,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:55:58,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:55:58,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:55:59,003 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 346 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:55:59,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:55:59,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314880076] [2022-12-13 17:55:59,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314880076] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:55:59,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779897165] [2022-12-13 17:55:59,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:55:59,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:55:59,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:55:59,004 INFO L229 MonitoredProcess]: Starting monitored process 160 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:55:59,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-12-13 17:55:59,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:55:59,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:55:59,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 17:55:59,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:55:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 392 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:55:59,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:55:59,907 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 392 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:55:59,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779897165] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:55:59,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:55:59,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 70 [2022-12-13 17:55:59,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379537354] [2022-12-13 17:55:59,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:55:59,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-12-13 17:55:59,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:55:59,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-12-13 17:55:59,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=829, Invalid=4001, Unknown=0, NotChecked=0, Total=4830 [2022-12-13 17:55:59,909 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 70 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:10,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:56:10,876 INFO L93 Difference]: Finished difference Result 695 states and 722 transitions. [2022-12-13 17:56:10,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-12-13 17:56:10,876 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 70 states have internal predecessors, (146), 0 states have call successors, (0), 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 75 [2022-12-13 17:56:10,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:56:10,877 INFO L225 Difference]: With dead ends: 695 [2022-12-13 17:56:10,877 INFO L226 Difference]: Without dead ends: 640 [2022-12-13 17:56:10,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 84 SyntacticMatches, 35 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13152 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5300, Invalid=25500, Unknown=0, NotChecked=0, Total=30800 [2022-12-13 17:56:10,879 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 513 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:56:10,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 388 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:56:10,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-12-13 17:56:12,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 109. [2022-12-13 17:56:12,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:12,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2022-12-13 17:56:12,043 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2022-12-13 17:56:12,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:56:12,043 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2022-12-13 17:56:12,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 70 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:12,044 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2022-12-13 17:56:12,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-13 17:56:12,044 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:56:12,044 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:56:12,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2022-12-13 17:56:12,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2022-12-13 17:56:12,245 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:56:12,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:56:12,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1149354461, now seen corresponding path program 113 times [2022-12-13 17:56:12,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:56:12,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316446277] [2022-12-13 17:56:12,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:56:12,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:56:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:56:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 346 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:12,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:56:12,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316446277] [2022-12-13 17:56:12,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316446277] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:56:12,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270531693] [2022-12-13 17:56:12,766 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:56:12,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:56:12,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:56:12,767 INFO L229 MonitoredProcess]: Starting monitored process 161 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:56:12,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-12-13 17:56:12,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-12-13 17:56:12,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:56:12,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 17:56:12,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:56:13,596 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 392 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:13,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:56:13,946 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 392 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:13,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270531693] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:56:13,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:56:13,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 69 [2022-12-13 17:56:13,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278795776] [2022-12-13 17:56:13,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:56:13,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-12-13 17:56:13,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:56:13,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-12-13 17:56:13,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=805, Invalid=3887, Unknown=0, NotChecked=0, Total=4692 [2022-12-13 17:56:13,947 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:26,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:56:26,279 INFO L93 Difference]: Finished difference Result 757 states and 785 transitions. [2022-12-13 17:56:26,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-12-13 17:56:26,279 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 0 states have call successors, (0), 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 75 [2022-12-13 17:56:26,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:56:26,280 INFO L225 Difference]: With dead ends: 757 [2022-12-13 17:56:26,280 INFO L226 Difference]: Without dead ends: 702 [2022-12-13 17:56:26,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 85 SyntacticMatches, 35 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13247 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5363, Invalid=25789, Unknown=0, NotChecked=0, Total=31152 [2022-12-13 17:56:26,281 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 425 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:56:26,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 393 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:56:26,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-12-13 17:56:27,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 109. [2022-12-13 17:56:27,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:27,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2022-12-13 17:56:27,460 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2022-12-13 17:56:27,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:56:27,460 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2022-12-13 17:56:27,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:27,460 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2022-12-13 17:56:27,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-13 17:56:27,461 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:56:27,461 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:56:27,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-12-13 17:56:27,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,161 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:56:27,662 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:56:27,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:56:27,662 INFO L85 PathProgramCache]: Analyzing trace with hash 604473372, now seen corresponding path program 114 times [2022-12-13 17:56:27,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:56:27,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753753001] [2022-12-13 17:56:27,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:56:27,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:56:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:56:28,088 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 346 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:28,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:56:28,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753753001] [2022-12-13 17:56:28,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753753001] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:56:28,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901276749] [2022-12-13 17:56:28,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:56:28,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:56:28,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:56:28,089 INFO L229 MonitoredProcess]: Starting monitored process 162 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:56:28,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-12-13 17:56:28,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-12-13 17:56:28,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:56:28,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 17:56:28,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:56:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 392 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:28,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:56:29,082 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 392 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:29,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901276749] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:56:29,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:56:29,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 68 [2022-12-13 17:56:29,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589134467] [2022-12-13 17:56:29,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:56:29,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-13 17:56:29,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:56:29,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-13 17:56:29,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=3771, Unknown=0, NotChecked=0, Total=4556 [2022-12-13 17:56:29,084 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 68 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) [2022-12-13 17:56:41,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:56:41,929 INFO L93 Difference]: Finished difference Result 818 states and 847 transitions. [2022-12-13 17:56:41,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-12-13 17:56:41,929 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 68 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 75 [2022-12-13 17:56:41,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:56:41,930 INFO L225 Difference]: With dead ends: 818 [2022-12-13 17:56:41,930 INFO L226 Difference]: Without dead ends: 763 [2022-12-13 17:56:41,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 86 SyntacticMatches, 35 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13060 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5298, Invalid=25502, Unknown=0, NotChecked=0, Total=30800 [2022-12-13 17:56:41,931 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 517 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:56:41,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 345 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:56:41,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-12-13 17:56:43,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 109. [2022-12-13 17:56:43,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:43,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2022-12-13 17:56:43,118 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2022-12-13 17:56:43,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:56:43,118 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2022-12-13 17:56:43,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 68 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) [2022-12-13 17:56:43,118 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2022-12-13 17:56:43,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-13 17:56:43,118 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:56:43,119 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:56:43,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-12-13 17:56:43,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,162 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:56:43,320 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:56:43,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:56:43,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1214218755, now seen corresponding path program 115 times [2022-12-13 17:56:43,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:56:43,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779705283] [2022-12-13 17:56:43,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:56:43,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:56:43,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:56:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 346 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:43,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:56:43,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779705283] [2022-12-13 17:56:43,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779705283] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:56:43,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064894513] [2022-12-13 17:56:43,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:56:43,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:56:43,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:56:43,747 INFO L229 MonitoredProcess]: Starting monitored process 163 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:56:43,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-12-13 17:56:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:56:43,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 17:56:43,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:56:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 392 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:44,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:56:44,819 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 392 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:44,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064894513] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:56:44,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:56:44,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 67 [2022-12-13 17:56:44,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909232226] [2022-12-13 17:56:44,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:56:44,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-12-13 17:56:44,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:56:44,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-12-13 17:56:44,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=769, Invalid=3653, Unknown=0, NotChecked=0, Total=4422 [2022-12-13 17:56:44,821 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 67 states, 67 states have (on average 2.1343283582089554) internal successors, (143), 67 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:58,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:56:58,558 INFO L93 Difference]: Finished difference Result 878 states and 908 transitions. [2022-12-13 17:56:58,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-12-13 17:56:58,559 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1343283582089554) internal successors, (143), 67 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-12-13 17:56:58,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:56:58,559 INFO L225 Difference]: With dead ends: 878 [2022-12-13 17:56:58,559 INFO L226 Difference]: Without dead ends: 823 [2022-12-13 17:56:58,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 87 SyntacticMatches, 35 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12588 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5108, Invalid=24648, Unknown=0, NotChecked=0, Total=29756 [2022-12-13 17:56:58,561 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 528 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 17:56:58,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [528 Valid, 402 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 17:56:58,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-12-13 17:56:59,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 109. [2022-12-13 17:56:59,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:59,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2022-12-13 17:56:59,772 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2022-12-13 17:56:59,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:56:59,772 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2022-12-13 17:56:59,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.1343283582089554) internal successors, (143), 67 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:59,772 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2022-12-13 17:56:59,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-13 17:56:59,772 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:56:59,772 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:56:59,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-12-13 17:56:59,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,163 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:56:59,973 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:56:59,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:56:59,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1913702396, now seen corresponding path program 116 times [2022-12-13 17:56:59,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:56:59,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582363263] [2022-12-13 17:56:59,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:56:59,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:56:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:57:00,387 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 346 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:57:00,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:57:00,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582363263] [2022-12-13 17:57:00,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582363263] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:57:00,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970845705] [2022-12-13 17:57:00,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:57:00,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:57:00,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:57:00,389 INFO L229 MonitoredProcess]: Starting monitored process 164 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:57:00,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-12-13 17:57:00,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:57:00,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:57:00,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 17:57:00,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:57:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 392 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:57:01,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:57:01,396 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 392 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:57:01,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970845705] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:57:01,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:57:01,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 66 [2022-12-13 17:57:01,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533668372] [2022-12-13 17:57:01,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:57:01,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-12-13 17:57:01,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:57:01,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-12-13 17:57:01,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=3533, Unknown=0, NotChecked=0, Total=4290 [2022-12-13 17:57:01,398 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 66 states, 66 states have (on average 2.1515151515151514) internal successors, (142), 66 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:57:15,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:57:15,594 INFO L93 Difference]: Finished difference Result 937 states and 968 transitions. [2022-12-13 17:57:15,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-12-13 17:57:15,594 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.1515151515151514) internal successors, (142), 66 states have internal predecessors, (142), 0 states have call successors, (0), 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 75 [2022-12-13 17:57:15,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:57:15,595 INFO L225 Difference]: With dead ends: 937 [2022-12-13 17:57:15,595 INFO L226 Difference]: Without dead ends: 882 [2022-12-13 17:57:15,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 88 SyntacticMatches, 35 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11839 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4802, Invalid=23254, Unknown=0, NotChecked=0, Total=28056 [2022-12-13 17:57:15,596 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 465 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 17:57:15,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 470 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 17:57:15,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2022-12-13 17:57:16,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 109. [2022-12-13 17:57:16,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:57:16,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2022-12-13 17:57:16,806 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2022-12-13 17:57:16,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:57:16,806 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2022-12-13 17:57:16,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.1515151515151514) internal successors, (142), 66 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:57:16,807 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2022-12-13 17:57:16,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-13 17:57:16,807 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:57:16,807 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:57:16,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-12-13 17:57:17,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,164 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:57:17,008 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:57:17,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:57:17,009 INFO L85 PathProgramCache]: Analyzing trace with hash 629129757, now seen corresponding path program 117 times [2022-12-13 17:57:17,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:57:17,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117212102] [2022-12-13 17:57:17,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:57:17,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:57:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:57:17,461 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 346 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:57:17,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:57:17,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117212102] [2022-12-13 17:57:17,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117212102] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:57:17,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370672684] [2022-12-13 17:57:17,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:57:17,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:57:17,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:57:17,463 INFO L229 MonitoredProcess]: Starting monitored process 165 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:57:17,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-12-13 17:57:17,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-12-13 17:57:17,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:57:17,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 17:57:17,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:57:18,056 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 392 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:57:18,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:57:18,391 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 392 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:57:18,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370672684] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:57:18,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:57:18,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 65 [2022-12-13 17:57:18,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767402220] [2022-12-13 17:57:18,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:57:18,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-12-13 17:57:18,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:57:18,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-12-13 17:57:18,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=3411, Unknown=0, NotChecked=0, Total=4160 [2022-12-13 17:57:18,393 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 65 states, 65 states have (on average 2.169230769230769) internal successors, (141), 65 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:57:32,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:57:32,631 INFO L93 Difference]: Finished difference Result 995 states and 1027 transitions. [2022-12-13 17:57:32,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-12-13 17:57:32,632 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.169230769230769) internal successors, (141), 65 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-12-13 17:57:32,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:57:32,632 INFO L225 Difference]: With dead ends: 995 [2022-12-13 17:57:32,632 INFO L226 Difference]: Without dead ends: 940 [2022-12-13 17:57:32,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 89 SyntacticMatches, 35 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10833 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4395, Invalid=21365, Unknown=0, NotChecked=0, Total=25760 [2022-12-13 17:57:32,634 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 490 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:57:32,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 423 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:57:32,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2022-12-13 17:57:33,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 109. [2022-12-13 17:57:33,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:57:33,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2022-12-13 17:57:33,849 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2022-12-13 17:57:33,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:57:33,849 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2022-12-13 17:57:33,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.169230769230769) internal successors, (141), 65 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:57:33,849 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2022-12-13 17:57:33,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-13 17:57:33,850 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:57:33,850 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:57:33,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-12-13 17:57:34,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,165 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:57:34,051 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:57:34,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:57:34,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1490518052, now seen corresponding path program 118 times [2022-12-13 17:57:34,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:57:34,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652674320] [2022-12-13 17:57:34,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:57:34,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:57:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:57:34,522 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 346 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:57:34,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:57:34,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652674320] [2022-12-13 17:57:34,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652674320] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:57:34,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653945511] [2022-12-13 17:57:34,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:57:34,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:57:34,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:57:34,523 INFO L229 MonitoredProcess]: Starting monitored process 166 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:57:34,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-12-13 17:57:34,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:57:34,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:57:34,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 17:57:34,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:57:35,182 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 392 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:57:35,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:57:35,538 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 392 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:57:35,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653945511] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:57:35,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:57:35,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 64 [2022-12-13 17:57:35,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764155261] [2022-12-13 17:57:35,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:57:35,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-13 17:57:35,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:57:35,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-13 17:57:35,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=3287, Unknown=0, NotChecked=0, Total=4032 [2022-12-13 17:57:35,539 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 64 states, 64 states have (on average 2.1875) internal successors, (140), 64 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:57:50,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:57:50,524 INFO L93 Difference]: Finished difference Result 1052 states and 1085 transitions. [2022-12-13 17:57:50,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-12-13 17:57:50,524 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.1875) internal successors, (140), 64 states have internal predecessors, (140), 0 states have call successors, (0), 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 75 [2022-12-13 17:57:50,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:57:50,525 INFO L225 Difference]: With dead ends: 1052 [2022-12-13 17:57:50,525 INFO L226 Difference]: Without dead ends: 997 [2022-12-13 17:57:50,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 90 SyntacticMatches, 35 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9602 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3908, Invalid=19044, Unknown=0, NotChecked=0, Total=22952 [2022-12-13 17:57:50,526 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 539 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 17:57:50,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 444 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 17:57:50,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2022-12-13 17:57:51,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 109. [2022-12-13 17:57:51,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:57:51,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2022-12-13 17:57:51,754 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2022-12-13 17:57:51,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:57:51,754 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2022-12-13 17:57:51,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.1875) internal successors, (140), 64 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:57:51,754 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2022-12-13 17:57:51,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-13 17:57:51,754 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:57:51,754 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:57:51,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-12-13 17:57:51,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,166 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:57:51,955 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:57:51,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:57:51,956 INFO L85 PathProgramCache]: Analyzing trace with hash -727609795, now seen corresponding path program 119 times [2022-12-13 17:57:51,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:57:51,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952980946] [2022-12-13 17:57:51,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:57:51,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:57:51,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:57:52,427 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 346 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:57:52,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:57:52,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952980946] [2022-12-13 17:57:52,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952980946] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:57:52,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399790097] [2022-12-13 17:57:52,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:57:52,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:57:52,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:57:52,428 INFO L229 MonitoredProcess]: Starting monitored process 167 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:57:52,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-12-13 17:57:52,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-12-13 17:57:52,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:57:52,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 17:57:52,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:57:53,161 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 392 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:57:53,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:57:53,582 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 392 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:57:53,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399790097] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:57:53,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:57:53,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 63 [2022-12-13 17:57:53,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137120438] [2022-12-13 17:57:53,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:57:53,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-13 17:57:53,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:57:53,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-13 17:57:53,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=3161, Unknown=0, NotChecked=0, Total=3906 [2022-12-13 17:57:53,584 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 63 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:58:09,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:58:09,546 INFO L93 Difference]: Finished difference Result 1108 states and 1142 transitions. [2022-12-13 17:58:09,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-12-13 17:58:09,546 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 63 states have internal predecessors, (139), 0 states have call successors, (0), 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 75 [2022-12-13 17:58:09,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:58:09,547 INFO L225 Difference]: With dead ends: 1108 [2022-12-13 17:58:09,547 INFO L226 Difference]: Without dead ends: 1053 [2022-12-13 17:58:09,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 91 SyntacticMatches, 35 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8190 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3368, Invalid=16372, Unknown=0, NotChecked=0, Total=19740 [2022-12-13 17:58:09,548 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 520 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:58:09,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 404 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:58:09,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2022-12-13 17:58:10,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 109. [2022-12-13 17:58:10,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:58:10,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2022-12-13 17:58:10,814 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2022-12-13 17:58:10,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:58:10,814 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2022-12-13 17:58:10,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 63 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:58:10,814 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2022-12-13 17:58:10,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-13 17:58:10,815 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:58:10,815 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:58:10,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2022-12-13 17:58:11,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,167 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:58:11,015 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:58:11,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:58:11,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1534283844, now seen corresponding path program 120 times [2022-12-13 17:58:11,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:58:11,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204288357] [2022-12-13 17:58:11,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:58:11,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:58:11,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:58:11,541 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 346 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:58:11,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:58:11,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204288357] [2022-12-13 17:58:11,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204288357] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:58:11,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729631589] [2022-12-13 17:58:11,542 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:58:11,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:58:11,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:58:11,543 INFO L229 MonitoredProcess]: Starting monitored process 168 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:58:11,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-12-13 17:58:11,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-12-13 17:58:11,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:58:11,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 17:58:11,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:58:12,182 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 392 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:58:12,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:58:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 392 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:58:12,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729631589] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:58:12,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:58:12,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 62 [2022-12-13 17:58:12,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476258897] [2022-12-13 17:58:12,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:58:12,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-12-13 17:58:12,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:58:12,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-12-13 17:58:12,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=3033, Unknown=0, NotChecked=0, Total=3782 [2022-12-13 17:58:12,594 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 62 states, 62 states have (on average 2.225806451612903) internal successors, (138), 62 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:58:30,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:58:30,415 INFO L93 Difference]: Finished difference Result 1163 states and 1198 transitions. [2022-12-13 17:58:30,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-12-13 17:58:30,415 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.225806451612903) internal successors, (138), 62 states have internal predecessors, (138), 0 states have call successors, (0), 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 75 [2022-12-13 17:58:30,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:58:30,415 INFO L225 Difference]: With dead ends: 1163 [2022-12-13 17:58:30,416 INFO L226 Difference]: Without dead ends: 1108 [2022-12-13 17:58:30,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 92 SyntacticMatches, 35 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6617 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2808, Invalid=13448, Unknown=0, NotChecked=0, Total=16256 [2022-12-13 17:58:30,416 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 945 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:58:30,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [945 Valid, 374 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:58:30,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2022-12-13 17:58:31,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 109. [2022-12-13 17:58:31,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:58:31,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2022-12-13 17:58:31,669 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2022-12-13 17:58:31,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:58:31,669 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2022-12-13 17:58:31,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.225806451612903) internal successors, (138), 62 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:58:31,669 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2022-12-13 17:58:31,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-13 17:58:31,669 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:58:31,669 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:58:31,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2022-12-13 17:58:31,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-12-13 17:58:31,870 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:58:31,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:58:31,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1006116259, now seen corresponding path program 16 times [2022-12-13 17:58:31,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:58:31,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518612540] [2022-12-13 17:58:31,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:58:31,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:58:31,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:58:32,314 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 346 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:58:32,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:58:32,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518612540] [2022-12-13 17:58:32,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518612540] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:58:32,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119546470] [2022-12-13 17:58:32,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:58:32,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:58:32,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:58:32,315 INFO L229 MonitoredProcess]: Starting monitored process 169 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:58:32,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-12-13 17:58:32,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:58:32,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:58:32,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 17:58:32,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:58:32,882 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:58:32,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:58:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:58:33,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119546470] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:58:33,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:58:33,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 61 [2022-12-13 17:58:33,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528603290] [2022-12-13 17:58:33,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:58:33,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-12-13 17:58:33,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:58:33,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-12-13 17:58:33,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=2903, Unknown=0, NotChecked=0, Total=3660 [2022-12-13 17:58:33,252 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 61 states, 61 states have (on average 2.2459016393442623) internal successors, (137), 61 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:58:50,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:58:50,218 INFO L93 Difference]: Finished difference Result 1220 states and 1257 transitions. [2022-12-13 17:58:50,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-12-13 17:58:50,218 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.2459016393442623) internal successors, (137), 61 states have internal predecessors, (137), 0 states have call successors, (0), 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 75 [2022-12-13 17:58:50,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:58:50,219 INFO L225 Difference]: With dead ends: 1220 [2022-12-13 17:58:50,219 INFO L226 Difference]: Without dead ends: 1165 [2022-12-13 17:58:50,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 93 SyntacticMatches, 35 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5028 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2285, Invalid=10371, Unknown=0, NotChecked=0, Total=12656 [2022-12-13 17:58:50,219 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 581 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:58:50,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 338 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:58:50,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2022-12-13 17:58:51,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 111. [2022-12-13 17:58:51,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1818181818181819) internal successors, (130), 110 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:58:51,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 130 transitions. [2022-12-13 17:58:51,489 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 130 transitions. Word has length 75 [2022-12-13 17:58:51,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:58:51,489 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 130 transitions. [2022-12-13 17:58:51,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.2459016393442623) internal successors, (137), 61 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:58:51,489 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 130 transitions. [2022-12-13 17:58:51,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-13 17:58:51,489 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:58:51,489 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:58:51,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-12-13 17:58:51,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-12-13 17:58:51,690 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:58:51,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:58:51,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1801237463, now seen corresponding path program 32 times [2022-12-13 17:58:51,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:58:51,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645790397] [2022-12-13 17:58:51,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:58:51,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:58:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:58:51,993 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 136 proven. 409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:58:51,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:58:51,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645790397] [2022-12-13 17:58:51,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645790397] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:58:51,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230322319] [2022-12-13 17:58:51,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:58:51,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:58:51,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:58:51,995 INFO L229 MonitoredProcess]: Starting monitored process 170 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:58:51,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-12-13 17:58:52,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:58:52,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:58:52,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 17:58:52,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:58:52,129 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 153 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:58:52,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:58:52,355 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 153 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:58:52,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230322319] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:58:52,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:58:52,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 23 [2022-12-13 17:58:52,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682943208] [2022-12-13 17:58:52,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:58:52,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 17:58:52,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:58:52,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 17:58:52,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-12-13 17:58:52,356 INFO L87 Difference]: Start difference. First operand 111 states and 130 transitions. Second operand has 23 states, 23 states have (on average 3.652173913043478) internal successors, (84), 23 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:58:53,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:58:53,983 INFO L93 Difference]: Finished difference Result 122 states and 141 transitions. [2022-12-13 17:58:53,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-13 17:58:53,983 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.652173913043478) internal successors, (84), 23 states have internal predecessors, (84), 0 states have call successors, (0), 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 76 [2022-12-13 17:58:53,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:58:53,984 INFO L225 Difference]: With dead ends: 122 [2022-12-13 17:58:53,984 INFO L226 Difference]: Without dead ends: 120 [2022-12-13 17:58:53,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 132 SyntacticMatches, 34 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=616, Invalid=1106, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 17:58:53,984 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 112 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:58:53,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 242 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:58:53,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-12-13 17:58:55,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 114. [2022-12-13 17:58:55,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.176991150442478) internal successors, (133), 113 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:58:55,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 133 transitions. [2022-12-13 17:58:55,297 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 133 transitions. Word has length 76 [2022-12-13 17:58:55,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:58:55,297 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 133 transitions. [2022-12-13 17:58:55,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.652173913043478) internal successors, (84), 23 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:58:55,297 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 133 transitions. [2022-12-13 17:58:55,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-13 17:58:55,297 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:58:55,297 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:58:55,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-12-13 17:58:55,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-12-13 17:58:55,498 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:58:55,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:58:55,499 INFO L85 PathProgramCache]: Analyzing trace with hash -651292871, now seen corresponding path program 33 times [2022-12-13 17:58:55,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:58:55,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482127363] [2022-12-13 17:58:55,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:58:55,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:58:55,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:58:56,086 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 393 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:58:56,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:58:56,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482127363] [2022-12-13 17:58:56,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482127363] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:58:56,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200221044] [2022-12-13 17:58:56,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:58:56,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:58:56,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:58:56,088 INFO L229 MonitoredProcess]: Starting monitored process 171 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:58:56,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_817f1d14-c09a-417f-b625-b25928c4a425/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-12-13 17:58:56,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-12-13 17:58:56,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:58:56,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 17:58:56,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:58:57,020 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:58:57,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:58:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:58:57,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200221044] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:58:57,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:58:57,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 81 [2022-12-13 17:58:57,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311732966] [2022-12-13 17:58:57,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:58:57,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-12-13 17:58:57,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:58:57,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-12-13 17:58:57,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=5253, Unknown=0, NotChecked=0, Total=6480 [2022-12-13 17:58:57,414 INFO L87 Difference]: Start difference. First operand 114 states and 133 transitions. Second operand has 81 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 81 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)