./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/avg20-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/avg20-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN --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 61bc8e70ac867c6ac52806e5ae8f7e7cefd73775be941aab831dd9bf86f7dc88 --- 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-6b4ec56 [2022-11-20 11:45:20,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:45:20,230 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:45:20,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:45:20,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:45:20,259 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:45:20,261 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:45:20,263 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:45:20,266 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:45:20,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:45:20,268 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:45:20,270 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:45:20,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:45:20,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:45:20,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:45:20,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:45:20,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:45:20,278 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:45:20,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:45:20,283 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:45:20,285 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:45:20,287 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:45:20,289 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:45:20,290 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:45:20,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:45:20,296 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:45:20,296 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:45:20,298 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:45:20,298 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:45:20,300 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:45:20,300 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:45:20,301 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:45:20,302 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:45:20,303 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:45:20,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:45:20,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:45:20,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:45:20,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:45:20,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:45:20,308 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:45:20,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:45:20,311 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:45:20,340 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:45:20,340 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:45:20,341 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:45:20,341 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:45:20,342 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:45:20,343 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:45:20,344 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:45:20,344 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:45:20,344 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:45:20,345 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:45:20,345 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:45:20,346 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:45:20,346 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:45:20,346 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:45:20,347 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:45:20,347 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:45:20,347 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:45:20,348 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:45:20,348 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:45:20,348 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:45:20,349 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:45:20,349 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:45:20,349 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:45:20,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:45:20,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:45:20,350 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:45:20,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:45:20,351 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:45:20,351 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:45:20,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:45:20,352 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:45:20,352 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:45:20,353 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:45:20,353 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61bc8e70ac867c6ac52806e5ae8f7e7cefd73775be941aab831dd9bf86f7dc88 [2022-11-20 11:45:20,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:45:20,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:45:20,715 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:45:20,716 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:45:20,717 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:45:20,718 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/reducercommutativity/avg20-2.i [2022-11-20 11:45:24,571 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:45:24,866 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:45:24,867 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/sv-benchmarks/c/reducercommutativity/avg20-2.i [2022-11-20 11:45:24,875 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/data/95216e522/b687b146b4b84a5fa7d805202964ce23/FLAG232a89330 [2022-11-20 11:45:24,894 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/data/95216e522/b687b146b4b84a5fa7d805202964ce23 [2022-11-20 11:45:24,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:45:24,900 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:45:24,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:45:24,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:45:24,907 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:45:24,908 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:45:24" (1/1) ... [2022-11-20 11:45:24,909 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66060d21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:24, skipping insertion in model container [2022-11-20 11:45:24,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:45:24" (1/1) ... [2022-11-20 11:45:24,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:45:24,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:45:25,226 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_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/sv-benchmarks/c/reducercommutativity/avg20-2.i[1282,1295] [2022-11-20 11:45:25,232 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:45:25,245 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:45:25,289 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_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/sv-benchmarks/c/reducercommutativity/avg20-2.i[1282,1295] [2022-11-20 11:45:25,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:45:25,308 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:45:25,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:25 WrapperNode [2022-11-20 11:45:25,309 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:45:25,311 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:45:25,311 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:45:25,312 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:45:25,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:25" (1/1) ... [2022-11-20 11:45:25,343 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:25" (1/1) ... [2022-11-20 11:45:25,365 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-11-20 11:45:25,366 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:45:25,366 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:45:25,367 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:45:25,367 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:45:25,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:25" (1/1) ... [2022-11-20 11:45:25,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:25" (1/1) ... [2022-11-20 11:45:25,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:25" (1/1) ... [2022-11-20 11:45:25,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:25" (1/1) ... [2022-11-20 11:45:25,388 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:25" (1/1) ... [2022-11-20 11:45:25,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:25" (1/1) ... [2022-11-20 11:45:25,394 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:25" (1/1) ... [2022-11-20 11:45:25,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:25" (1/1) ... [2022-11-20 11:45:25,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:45:25,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:45:25,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:45:25,399 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:45:25,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:25" (1/1) ... [2022-11-20 11:45:25,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:45:25,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:25,439 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:45:25,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:45:25,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:45:25,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:45:25,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:45:25,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:45:25,497 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2022-11-20 11:45:25,497 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2022-11-20 11:45:25,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:45:25,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:45:25,498 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:45:25,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:45:25,593 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:45:25,595 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:45:25,936 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:45:25,944 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:45:25,945 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 11:45:25,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:45:25 BoogieIcfgContainer [2022-11-20 11:45:25,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:45:25,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:45:25,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:45:25,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:45:25,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:45:24" (1/3) ... [2022-11-20 11:45:25,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1053bdef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:45:25, skipping insertion in model container [2022-11-20 11:45:25,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:25" (2/3) ... [2022-11-20 11:45:25,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1053bdef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:45:25, skipping insertion in model container [2022-11-20 11:45:25,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:45:25" (3/3) ... [2022-11-20 11:45:25,960 INFO L112 eAbstractionObserver]: Analyzing ICFG avg20-2.i [2022-11-20 11:45:25,987 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:45:25,988 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:45:26,064 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:45:26,073 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;@2028a1a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:45:26,074 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 11:45:26,079 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:45:26,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 11:45:26,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:26,097 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:26,098 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:45:26,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:26,110 INFO L85 PathProgramCache]: Analyzing trace with hash -2001158789, now seen corresponding path program 1 times [2022-11-20 11:45:26,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:26,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184158728] [2022-11-20 11:45:26,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:26,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:26,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:45:26,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:26,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 11:45:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:26,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:45:26,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:26,710 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 11:45:26,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:26,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184158728] [2022-11-20 11:45:26,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184158728] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:26,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65150244] [2022-11-20 11:45:26,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:26,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:26,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:26,718 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:26,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:45:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:26,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:45:26,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:26,942 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 11:45:26,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:45:26,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65150244] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:45:26,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:45:26,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-20 11:45:26,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93868356] [2022-11-20 11:45:26,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:45:26,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:45:26,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:26,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:45:26,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:45:26,993 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 11:45:27,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:27,054 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2022-11-20 11:45:27,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:45:27,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-11-20 11:45:27,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:27,069 INFO L225 Difference]: With dead ends: 50 [2022-11-20 11:45:27,069 INFO L226 Difference]: Without dead ends: 24 [2022-11-20 11:45:27,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:45:27,077 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:27,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:45:27,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-20 11:45:27,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-11-20 11:45:27,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:45:27,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-20 11:45:27,120 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2022-11-20 11:45:27,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:27,121 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-20 11:45:27,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 11:45:27,122 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-20 11:45:27,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 11:45:27,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:27,124 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:27,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:45:27,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-20 11:45:27,332 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:45:27,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:27,334 INFO L85 PathProgramCache]: Analyzing trace with hash 202333565, now seen corresponding path program 1 times [2022-11-20 11:45:27,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:27,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064569812] [2022-11-20 11:45:27,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:27,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:27,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:27,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 11:45:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:27,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 11:45:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:27,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-20 11:45:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:27,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 11:45:27,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:27,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064569812] [2022-11-20 11:45:27,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064569812] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:27,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505765504] [2022-11-20 11:45:27,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:27,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:27,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:27,606 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:27,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:45:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:27,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:45:27,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 11:45:27,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:45:27,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505765504] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:45:27,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:45:27,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-20 11:45:27,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643349624] [2022-11-20 11:45:27,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:45:27,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:45:27,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:27,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:45:27,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:45:27,758 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 11:45:27,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:27,784 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-11-20 11:45:27,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:45:27,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-11-20 11:45:27,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:27,787 INFO L225 Difference]: With dead ends: 42 [2022-11-20 11:45:27,787 INFO L226 Difference]: Without dead ends: 25 [2022-11-20 11:45:27,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:45:27,790 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:27,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:45:27,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-20 11:45:27,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-11-20 11:45:27,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:45:27,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-20 11:45:27,802 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2022-11-20 11:45:27,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:27,804 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-20 11:45:27,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 11:45:27,805 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-20 11:45:27,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 11:45:27,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:27,807 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:27,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:45:28,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:28,014 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:45:28,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:28,015 INFO L85 PathProgramCache]: Analyzing trace with hash -796008709, now seen corresponding path program 1 times [2022-11-20 11:45:28,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:28,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074870929] [2022-11-20 11:45:28,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:28,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:28,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 11:45:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:28,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 11:45:28,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:28,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:45:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 11:45:28,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:28,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074870929] [2022-11-20 11:45:28,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074870929] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:28,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293448459] [2022-11-20 11:45:28,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:28,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:28,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:28,295 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:28,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:45:28,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:28,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:45:28,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 11:45:28,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:45:28,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293448459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:45:28,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:45:28,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-20 11:45:28,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930956248] [2022-11-20 11:45:28,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:45:28,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:45:28,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:28,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:45:28,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:45:28,451 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 11:45:28,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:28,468 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-11-20 11:45:28,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:45:28,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-11-20 11:45:28,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:28,470 INFO L225 Difference]: With dead ends: 39 [2022-11-20 11:45:28,471 INFO L226 Difference]: Without dead ends: 26 [2022-11-20 11:45:28,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:45:28,473 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:28,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:45:28,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-20 11:45:28,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-11-20 11:45:28,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:45:28,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-11-20 11:45:28,481 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 36 [2022-11-20 11:45:28,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:28,483 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-11-20 11:45:28,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 11:45:28,483 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-11-20 11:45:28,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 11:45:28,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:28,485 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:28,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:45:28,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:28,692 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:45:28,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:28,693 INFO L85 PathProgramCache]: Analyzing trace with hash 165229081, now seen corresponding path program 1 times [2022-11-20 11:45:28,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:28,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739266169] [2022-11-20 11:45:28,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:28,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:28,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:28,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 11:45:28,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:28,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 11:45:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:28,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:45:28,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:28,887 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:45:28,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:28,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739266169] [2022-11-20 11:45:28,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739266169] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:28,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929406289] [2022-11-20 11:45:28,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:28,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:28,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:28,891 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:28,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:45:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:29,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:45:29,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:29,124 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 11:45:29,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:29,184 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 11:45:29,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929406289] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:29,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:29,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-11-20 11:45:29,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024982078] [2022-11-20 11:45:29,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:29,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:45:29,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:29,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:45:29,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:45:29,189 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-20 11:45:29,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:29,246 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-11-20 11:45:29,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:45:29,247 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2022-11-20 11:45:29,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:29,248 INFO L225 Difference]: With dead ends: 54 [2022-11-20 11:45:29,248 INFO L226 Difference]: Without dead ends: 34 [2022-11-20 11:45:29,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:45:29,251 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:29,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 102 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:45:29,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-20 11:45:29,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-11-20 11:45:29,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:45:29,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-11-20 11:45:29,260 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 38 [2022-11-20 11:45:29,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:29,260 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-11-20 11:45:29,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-20 11:45:29,261 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-11-20 11:45:29,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-20 11:45:29,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:29,263 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:29,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:45:29,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:29,470 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:45:29,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:29,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1299679203, now seen corresponding path program 2 times [2022-11-20 11:45:29,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:29,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886361039] [2022-11-20 11:45:29,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:29,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:29,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:29,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-20 11:45:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:29,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-20 11:45:29,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:29,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-20 11:45:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:29,664 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-20 11:45:29,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:29,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886361039] [2022-11-20 11:45:29,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886361039] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:29,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913715651] [2022-11-20 11:45:29,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:45:29,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:29,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:29,668 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:29,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:45:29,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:45:29,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:45:29,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:45:29,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:29,899 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-20 11:45:29,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:30,040 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-20 11:45:30,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913715651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:30,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:30,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-11-20 11:45:30,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325176915] [2022-11-20 11:45:30,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:30,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:45:30,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:30,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:45:30,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:45:30,048 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 11:45:30,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:30,163 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2022-11-20 11:45:30,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:45:30,164 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2022-11-20 11:45:30,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:30,168 INFO L225 Difference]: With dead ends: 70 [2022-11-20 11:45:30,169 INFO L226 Difference]: Without dead ends: 48 [2022-11-20 11:45:30,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:45:30,177 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:30,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 80 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:45:30,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-20 11:45:30,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-11-20 11:45:30,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:45:30,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-11-20 11:45:30,195 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 50 [2022-11-20 11:45:30,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:30,195 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-11-20 11:45:30,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 11:45:30,196 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-11-20 11:45:30,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-20 11:45:30,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:30,198 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:30,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:45:30,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:30,399 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:45:30,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:30,399 INFO L85 PathProgramCache]: Analyzing trace with hash 936210247, now seen corresponding path program 3 times [2022-11-20 11:45:30,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:30,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648674156] [2022-11-20 11:45:30,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:30,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:30,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:30,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:45:30,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:30,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-20 11:45:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:30,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 11:45:30,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:30,912 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-20 11:45:30,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:30,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648674156] [2022-11-20 11:45:30,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648674156] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:30,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216932322] [2022-11-20 11:45:30,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:45:30,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:30,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:30,915 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:30,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:45:31,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 11:45:31,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:45:31,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:45:31,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:31,133 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-11-20 11:45:31,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:31,227 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-11-20 11:45:31,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216932322] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:31,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:31,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-11-20 11:45:31,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047817821] [2022-11-20 11:45:31,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:31,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 11:45:31,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:31,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 11:45:31,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:45:31,231 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 11:45:31,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:31,321 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2022-11-20 11:45:31,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 11:45:31,322 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2022-11-20 11:45:31,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:31,323 INFO L225 Difference]: With dead ends: 82 [2022-11-20 11:45:31,324 INFO L226 Difference]: Without dead ends: 58 [2022-11-20 11:45:31,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:45:31,326 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:31,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 102 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:45:31,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-20 11:45:31,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-11-20 11:45:31,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:45:31,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-11-20 11:45:31,346 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 64 [2022-11-20 11:45:31,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:31,347 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-11-20 11:45:31,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 11:45:31,349 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-11-20 11:45:31,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-20 11:45:31,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:31,352 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:31,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:45:31,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 11:45:31,558 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:45:31,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:31,562 INFO L85 PathProgramCache]: Analyzing trace with hash 161581377, now seen corresponding path program 4 times [2022-11-20 11:45:31,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:31,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978394082] [2022-11-20 11:45:31,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:31,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:31,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:32,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:45:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:32,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-20 11:45:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:32,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-20 11:45:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:32,047 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-11-20 11:45:32,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:32,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978394082] [2022-11-20 11:45:32,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978394082] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:32,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197495778] [2022-11-20 11:45:32,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:45:32,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:32,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:32,050 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:32,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:45:32,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:45:32,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:45:32,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:45:32,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:32,323 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 178 proven. 4 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-11-20 11:45:32,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-11-20 11:45:32,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197495778] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:32,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:32,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2022-11-20 11:45:32,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376623211] [2022-11-20 11:45:32,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:32,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 11:45:32,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:32,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 11:45:32,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:45:32,416 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 11:45:32,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:32,510 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2022-11-20 11:45:32,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 11:45:32,511 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 90 [2022-11-20 11:45:32,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:32,512 INFO L225 Difference]: With dead ends: 100 [2022-11-20 11:45:32,513 INFO L226 Difference]: Without dead ends: 68 [2022-11-20 11:45:32,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:45:32,515 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:32,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 81 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:45:32,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-20 11:45:32,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-11-20 11:45:32,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:45:32,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2022-11-20 11:45:32,526 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 90 [2022-11-20 11:45:32,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:32,526 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2022-11-20 11:45:32,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 11:45:32,527 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2022-11-20 11:45:32,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-20 11:45:32,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:32,529 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 12, 12, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:32,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:45:32,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:32,739 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:45:32,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:32,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1010910917, now seen corresponding path program 5 times [2022-11-20 11:45:32,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:32,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655550225] [2022-11-20 11:45:32,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:32,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:32,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:33,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:45:33,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:33,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-20 11:45:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:33,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-20 11:45:33,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:33,242 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2022-11-20 11:45:33,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:33,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655550225] [2022-11-20 11:45:33,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655550225] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:33,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481784573] [2022-11-20 11:45:33,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:45:33,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:33,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:33,253 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:33,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:45:34,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-11-20 11:45:34,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:45:34,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:45:34,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:34,524 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2022-11-20 11:45:34,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:34,748 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-11-20 11:45:34,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481784573] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:34,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:34,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2022-11-20 11:45:34,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746650223] [2022-11-20 11:45:34,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:34,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-20 11:45:34,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:34,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-20 11:45:34,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-20 11:45:34,757 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 11:45:34,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:34,935 INFO L93 Difference]: Finished difference Result 126 states and 145 transitions. [2022-11-20 11:45:34,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 11:45:34,936 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 100 [2022-11-20 11:45:34,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:34,939 INFO L225 Difference]: With dead ends: 126 [2022-11-20 11:45:34,939 INFO L226 Difference]: Without dead ends: 86 [2022-11-20 11:45:34,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-20 11:45:34,945 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:34,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 142 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:45:34,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-20 11:45:34,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-11-20 11:45:34,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:45:34,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2022-11-20 11:45:34,976 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 100 [2022-11-20 11:45:34,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:34,978 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2022-11-20 11:45:34,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 11:45:34,979 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2022-11-20 11:45:34,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-20 11:45:34,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:34,991 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 13, 13, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:34,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-20 11:45:35,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 11:45:35,200 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:45:35,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:35,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1009519917, now seen corresponding path program 6 times [2022-11-20 11:45:35,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:35,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938282520] [2022-11-20 11:45:35,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:35,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:35,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-20 11:45:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:35,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-20 11:45:35,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:35,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-11-20 11:45:35,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:35,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-11-20 11:45:35,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:35,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938282520] [2022-11-20 11:45:35,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938282520] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:35,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833463212] [2022-11-20 11:45:35,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:45:35,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:35,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:35,932 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:35,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:45:36,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-11-20 11:45:36,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:45:36,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:45:36,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:37,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 931 proven. 36 refuted. 0 times theorem prover too weak. 1101 trivial. 0 not checked. [2022-11-20 11:45:37,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:37,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2022-11-20 11:45:37,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833463212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:37,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:37,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 9] total 34 [2022-11-20 11:45:37,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095593443] [2022-11-20 11:45:37,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:37,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:45:37,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:37,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:45:37,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=845, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:45:37,372 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 34 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 34 states have internal predecessors, (89), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 11:45:37,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:37,956 INFO L93 Difference]: Finished difference Result 161 states and 178 transitions. [2022-11-20 11:45:37,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 11:45:37,957 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 34 states have internal predecessors, (89), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 150 [2022-11-20 11:45:37,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:37,958 INFO L225 Difference]: With dead ends: 161 [2022-11-20 11:45:37,958 INFO L226 Difference]: Without dead ends: 105 [2022-11-20 11:45:37,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=515, Invalid=1741, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 11:45:37,961 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 72 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:37,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 166 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:45:37,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-20 11:45:37,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-20 11:45:37,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.03) internal successors, (103), 100 states have internal predecessors, (103), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:45:37,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2022-11-20 11:45:37,985 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 150 [2022-11-20 11:45:37,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:37,985 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2022-11-20 11:45:37,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 34 states have internal predecessors, (89), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 11:45:37,986 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2022-11-20 11:45:37,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-11-20 11:45:37,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:37,988 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 15, 15, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:38,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:45:38,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:38,189 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:45:38,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:38,190 INFO L85 PathProgramCache]: Analyzing trace with hash -741965151, now seen corresponding path program 7 times [2022-11-20 11:45:38,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:38,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486179524] [2022-11-20 11:45:38,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:38,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:38,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:39,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 11:45:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:39,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-20 11:45:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:39,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-11-20 11:45:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:39,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2284 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-11-20 11:45:39,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:39,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486179524] [2022-11-20 11:45:39,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486179524] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:39,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506298652] [2022-11-20 11:45:39,076 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:45:39,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:39,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:39,078 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:39,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:45:39,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:39,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:45:39,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2284 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-11-20 11:45:39,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:39,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2284 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-11-20 11:45:39,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506298652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:39,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:39,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 23 [2022-11-20 11:45:39,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633674334] [2022-11-20 11:45:39,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:39,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 11:45:39,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:39,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 11:45:39,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-11-20 11:45:39,789 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-20 11:45:39,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:39,903 INFO L93 Difference]: Finished difference Result 187 states and 199 transitions. [2022-11-20 11:45:39,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 11:45:39,904 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 170 [2022-11-20 11:45:39,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:39,904 INFO L225 Difference]: With dead ends: 187 [2022-11-20 11:45:39,904 INFO L226 Difference]: Without dead ends: 115 [2022-11-20 11:45:39,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 329 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-11-20 11:45:39,905 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 20 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:39,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 134 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:45:39,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-20 11:45:39,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-11-20 11:45:39,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:45:39,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2022-11-20 11:45:39,936 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 170 [2022-11-20 11:45:39,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:39,937 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2022-11-20 11:45:39,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-20 11:45:39,938 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2022-11-20 11:45:39,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-11-20 11:45:39,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:39,940 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 20, 20, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:39,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:45:40,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:40,148 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:45:40,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:40,148 INFO L85 PathProgramCache]: Analyzing trace with hash -784239573, now seen corresponding path program 8 times [2022-11-20 11:45:40,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:40,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110056189] [2022-11-20 11:45:40,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:40,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:40,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:40,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 11:45:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:41,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-20 11:45:41,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:41,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-11-20 11:45:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2459 backedges. 0 proven. 1044 refuted. 0 times theorem prover too weak. 1415 trivial. 0 not checked. [2022-11-20 11:45:41,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:41,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110056189] [2022-11-20 11:45:41,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110056189] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:41,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077854101] [2022-11-20 11:45:41,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:45:41,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:41,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:41,104 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:41,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 11:45:41,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:45:41,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:45:41,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:45:41,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:41,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2459 backedges. 844 proven. 196 refuted. 0 times theorem prover too weak. 1419 trivial. 0 not checked. [2022-11-20 11:45:41,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:41,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2459 backedges. 0 proven. 1044 refuted. 0 times theorem prover too weak. 1415 trivial. 0 not checked. [2022-11-20 11:45:41,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077854101] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:41,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:41,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2022-11-20 11:45:41,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795257256] [2022-11-20 11:45:41,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:41,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 11:45:41,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:41,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 11:45:41,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:45:41,824 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 11:45:41,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:41,911 INFO L93 Difference]: Finished difference Result 198 states and 213 transitions. [2022-11-20 11:45:41,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 11:45:41,912 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 180 [2022-11-20 11:45:41,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:41,917 INFO L225 Difference]: With dead ends: 198 [2022-11-20 11:45:41,917 INFO L226 Difference]: Without dead ends: 127 [2022-11-20 11:45:41,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 351 SyntacticMatches, 10 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:45:41,919 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 20 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:41,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 46 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:45:41,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-20 11:45:41,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-11-20 11:45:41,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:45:41,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2022-11-20 11:45:41,951 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 180 [2022-11-20 11:45:41,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:41,952 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2022-11-20 11:45:41,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 11:45:41,952 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2022-11-20 11:45:41,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-11-20 11:45:41,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:41,965 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 20, 20, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:41,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 11:45:42,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:42,173 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:45:42,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:42,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1743923041, now seen corresponding path program 9 times [2022-11-20 11:45:42,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:42,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082237944] [2022-11-20 11:45:42,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:42,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:42,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:42,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 11:45:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:43,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-11-20 11:45:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:43,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-11-20 11:45:43,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4331 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4135 trivial. 0 not checked. [2022-11-20 11:45:43,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:43,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082237944] [2022-11-20 11:45:43,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082237944] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:45:43,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002949299] [2022-11-20 11:45:43,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:45:43,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:45:43,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:43,065 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:45:43,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 11:45:49,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-20 11:45:49,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:45:49,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 11:45:49,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:45:49,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4331 backedges. 1690 proven. 196 refuted. 0 times theorem prover too weak. 2445 trivial. 0 not checked. [2022-11-20 11:45:49,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:45:50,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4331 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4135 trivial. 0 not checked. [2022-11-20 11:45:50,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002949299] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:45:50,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:45:50,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2022-11-20 11:45:50,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673710515] [2022-11-20 11:45:50,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:45:50,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 11:45:50,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:50,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 11:45:50,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:45:50,100 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 11:45:50,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:50,195 INFO L93 Difference]: Finished difference Result 188 states and 197 transitions. [2022-11-20 11:45:50,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:45:50,196 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 216 [2022-11-20 11:45:50,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:50,197 INFO L225 Difference]: With dead ends: 188 [2022-11-20 11:45:50,197 INFO L226 Difference]: Without dead ends: 137 [2022-11-20 11:45:50,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 422 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:45:50,199 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 19 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:50,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 87 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:45:50,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-20 11:45:50,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-11-20 11:45:50,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0227272727272727) internal successors, (135), 132 states have internal predecessors, (135), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:45:50,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 141 transitions. [2022-11-20 11:45:50,217 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 141 transitions. Word has length 216 [2022-11-20 11:45:50,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:50,218 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 141 transitions. [2022-11-20 11:45:50,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 11:45:50,219 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 141 transitions. [2022-11-20 11:45:50,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-11-20 11:45:50,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:50,223 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:50,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 11:45:50,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eb30dad-31e0-4fa1-ad58-0edfaeb28bb7/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 11:45:50,435 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:45:50,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:50,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1352255541, now seen corresponding path program 10 times [2022-11-20 11:45:50,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:50,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880803321] [2022-11-20 11:45:50,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:50,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat