./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label08.c --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_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/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_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label08.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/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_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/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 9e8eccafd5332366d591fd0f563128386bcd6073a7941113bfddd094bb357fdc --- 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 11:12:18,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:12:18,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:12:18,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:12:18,185 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:12:18,187 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:12:18,188 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:12:18,190 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:12:18,192 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:12:18,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:12:18,194 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:12:18,195 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:12:18,196 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:12:18,197 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:12:18,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:12:18,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:12:18,200 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:12:18,201 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:12:18,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:12:18,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:12:18,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:12:18,209 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:12:18,210 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:12:18,211 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:12:18,215 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:12:18,215 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:12:18,216 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:12:18,217 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:12:18,217 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:12:18,219 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:12:18,219 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:12:18,220 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:12:18,221 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:12:18,222 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:12:18,223 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:12:18,224 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:12:18,225 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:12:18,225 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:12:18,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:12:18,227 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:12:18,228 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:12:18,229 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:12:18,264 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:12:18,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:12:18,270 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:12:18,270 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:12:18,271 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:12:18,271 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:12:18,272 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:12:18,273 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:12:18,273 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:12:18,273 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:12:18,274 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:12:18,274 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:12:18,274 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:12:18,274 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:12:18,275 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:12:18,275 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:12:18,275 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:12:18,276 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:12:18,276 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:12:18,276 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:12:18,277 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:12:18,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:12:18,277 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:12:18,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:12:18,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:12:18,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:12:18,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:12:18,279 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:12:18,279 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:12:18,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:12:18,280 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:12:18,280 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:12:18,280 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:12:18,281 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_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e8eccafd5332366d591fd0f563128386bcd6073a7941113bfddd094bb357fdc [2022-11-20 11:12:18,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:12:18,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:12:18,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:12:18,668 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:12:18,669 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:12:18,670 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/eca-rers2012/Problem17_label08.c [2022-11-20 11:12:21,918 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:12:22,374 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:12:22,374 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/sv-benchmarks/c/eca-rers2012/Problem17_label08.c [2022-11-20 11:12:22,399 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/bin/uautomizer-ug76WZFUDN/data/a2542406e/339d60129f7b4b9ea5d505ff616bce2a/FLAGb7f05ea35 [2022-11-20 11:12:22,414 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/bin/uautomizer-ug76WZFUDN/data/a2542406e/339d60129f7b4b9ea5d505ff616bce2a [2022-11-20 11:12:22,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:12:22,418 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:12:22,422 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:12:22,423 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:12:22,426 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:12:22,427 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:12:22" (1/1) ... [2022-11-20 11:12:22,428 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@109839d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:22, skipping insertion in model container [2022-11-20 11:12:22,429 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:12:22" (1/1) ... [2022-11-20 11:12:22,436 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:12:22,540 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:12:22,813 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_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/sv-benchmarks/c/eca-rers2012/Problem17_label08.c[8572,8585] [2022-11-20 11:12:23,561 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:12:23,576 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:12:23,615 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_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/sv-benchmarks/c/eca-rers2012/Problem17_label08.c[8572,8585] [2022-11-20 11:12:23,997 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:12:24,020 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:12:24,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:24 WrapperNode [2022-11-20 11:12:24,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:12:24,023 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:12:24,023 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:12:24,023 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:12:24,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:24" (1/1) ... [2022-11-20 11:12:24,113 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:24" (1/1) ... [2022-11-20 11:12:24,477 INFO L138 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2022-11-20 11:12:24,478 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:12:24,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:12:24,479 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:12:24,479 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:12:24,489 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:24" (1/1) ... [2022-11-20 11:12:24,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:24" (1/1) ... [2022-11-20 11:12:24,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:24" (1/1) ... [2022-11-20 11:12:24,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:24" (1/1) ... [2022-11-20 11:12:24,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:24" (1/1) ... [2022-11-20 11:12:24,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:24" (1/1) ... [2022-11-20 11:12:24,801 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:24" (1/1) ... [2022-11-20 11:12:24,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:24" (1/1) ... [2022-11-20 11:12:24,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:12:24,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:12:24,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:12:24,873 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:12:24,874 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:24" (1/1) ... [2022-11-20 11:12:24,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:12:24,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:12:24,911 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:12:24,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:12:24,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:12:24,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:12:24,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:12:24,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:12:25,044 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:12:25,046 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:12:30,002 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:12:30,024 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:12:30,035 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 11:12:30,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:12:30 BoogieIcfgContainer [2022-11-20 11:12:30,038 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:12:30,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:12:30,042 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:12:30,048 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:12:30,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:12:22" (1/3) ... [2022-11-20 11:12:30,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42c6276c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:12:30, skipping insertion in model container [2022-11-20 11:12:30,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:24" (2/3) ... [2022-11-20 11:12:30,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42c6276c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:12:30, skipping insertion in model container [2022-11-20 11:12:30,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:12:30" (3/3) ... [2022-11-20 11:12:30,058 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label08.c [2022-11-20 11:12:30,078 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:12:30,079 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:12:30,166 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:12:30,174 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;@12d63446, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:12:30,174 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 11:12:30,182 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:30,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-20 11:12:30,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:30,196 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:30,197 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:12:30,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:30,206 INFO L85 PathProgramCache]: Analyzing trace with hash -2074400678, now seen corresponding path program 1 times [2022-11-20 11:12:30,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:30,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418733432] [2022-11-20 11:12:30,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:30,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:30,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:12:30,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:30,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418733432] [2022-11-20 11:12:30,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418733432] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:30,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:30,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:12:30,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579779468] [2022-11-20 11:12:30,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:30,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:12:30,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:30,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:12:30,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:12:30,777 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:34,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:34,870 INFO L93 Difference]: Finished difference Result 1642 states and 3024 transitions. [2022-11-20 11:12:34,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:12:34,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-11-20 11:12:34,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:34,890 INFO L225 Difference]: With dead ends: 1642 [2022-11-20 11:12:34,890 INFO L226 Difference]: Without dead ends: 975 [2022-11-20 11:12:34,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:12:34,898 INFO L413 NwaCegarLoop]: 474 mSDtfsCounter, 432 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:34,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 550 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-20 11:12:34,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-11-20 11:12:34,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 972. [2022-11-20 11:12:34,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 1.5077239958805355) internal successors, (1464), 971 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:34,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1464 transitions. [2022-11-20 11:12:34,979 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1464 transitions. Word has length 58 [2022-11-20 11:12:34,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:34,979 INFO L495 AbstractCegarLoop]: Abstraction has 972 states and 1464 transitions. [2022-11-20 11:12:34,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:34,980 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1464 transitions. [2022-11-20 11:12:34,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-20 11:12:34,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:34,984 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:34,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:12:34,984 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:12:34,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:34,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1002261606, now seen corresponding path program 1 times [2022-11-20 11:12:34,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:34,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433696914] [2022-11-20 11:12:34,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:34,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:35,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:35,440 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:12:35,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:35,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433696914] [2022-11-20 11:12:35,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433696914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:35,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:35,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:12:35,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047551304] [2022-11-20 11:12:35,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:35,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:12:35,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:35,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:12:35,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:12:35,447 INFO L87 Difference]: Start difference. First operand 972 states and 1464 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:39,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:39,012 INFO L93 Difference]: Finished difference Result 2814 states and 4242 transitions. [2022-11-20 11:12:39,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:12:39,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2022-11-20 11:12:39,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:39,020 INFO L225 Difference]: With dead ends: 2814 [2022-11-20 11:12:39,021 INFO L226 Difference]: Without dead ends: 1844 [2022-11-20 11:12:39,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:12:39,024 INFO L413 NwaCegarLoop]: 853 mSDtfsCounter, 433 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:39,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 921 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-20 11:12:39,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2022-11-20 11:12:39,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1842. [2022-11-20 11:12:39,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1841 states have (on average 1.3601303639326452) internal successors, (2504), 1841 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:39,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 2504 transitions. [2022-11-20 11:12:39,077 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 2504 transitions. Word has length 128 [2022-11-20 11:12:39,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:39,078 INFO L495 AbstractCegarLoop]: Abstraction has 1842 states and 2504 transitions. [2022-11-20 11:12:39,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:39,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 2504 transitions. [2022-11-20 11:12:39,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-20 11:12:39,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:39,083 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:39,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:12:39,084 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:12:39,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:39,085 INFO L85 PathProgramCache]: Analyzing trace with hash -433901431, now seen corresponding path program 1 times [2022-11-20 11:12:39,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:39,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809832097] [2022-11-20 11:12:39,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:39,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:39,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:39,328 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:12:39,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:39,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809832097] [2022-11-20 11:12:39,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809832097] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:39,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:39,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:12:39,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524328679] [2022-11-20 11:12:39,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:39,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:12:39,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:39,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:12:39,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:12:39,332 INFO L87 Difference]: Start difference. First operand 1842 states and 2504 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:42,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:42,495 INFO L93 Difference]: Finished difference Result 5395 states and 7326 transitions. [2022-11-20 11:12:42,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:12:42,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2022-11-20 11:12:42,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:42,505 INFO L225 Difference]: With dead ends: 5395 [2022-11-20 11:12:42,506 INFO L226 Difference]: Without dead ends: 2701 [2022-11-20 11:12:42,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:12:42,510 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 368 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:42,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-20 11:12:42,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2022-11-20 11:12:42,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2701. [2022-11-20 11:12:42,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2701 states, 2700 states have (on average 1.191851851851852) internal successors, (3218), 2700 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:42,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2701 states to 2701 states and 3218 transitions. [2022-11-20 11:12:42,572 INFO L78 Accepts]: Start accepts. Automaton has 2701 states and 3218 transitions. Word has length 150 [2022-11-20 11:12:42,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:42,573 INFO L495 AbstractCegarLoop]: Abstraction has 2701 states and 3218 transitions. [2022-11-20 11:12:42,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:42,573 INFO L276 IsEmpty]: Start isEmpty. Operand 2701 states and 3218 transitions. [2022-11-20 11:12:42,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-11-20 11:12:42,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:42,577 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:42,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:12:42,578 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:12:42,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:42,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1641598275, now seen corresponding path program 1 times [2022-11-20 11:12:42,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:42,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794774094] [2022-11-20 11:12:42,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:42,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:42,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:12:42,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:42,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794774094] [2022-11-20 11:12:42,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794774094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:42,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:42,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:12:42,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882121045] [2022-11-20 11:12:42,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:42,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:12:42,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:42,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:12:42,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:12:42,854 INFO L87 Difference]: Start difference. First operand 2701 states and 3218 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:45,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:45,389 INFO L93 Difference]: Finished difference Result 7108 states and 8598 transitions. [2022-11-20 11:12:45,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:12:45,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 210 [2022-11-20 11:12:45,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:45,420 INFO L225 Difference]: With dead ends: 7108 [2022-11-20 11:12:45,420 INFO L226 Difference]: Without dead ends: 4409 [2022-11-20 11:12:45,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:12:45,424 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:45,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 784 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-20 11:12:45,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4409 states. [2022-11-20 11:12:45,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4409 to 4409. [2022-11-20 11:12:45,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4408 states have (on average 1.1705989110707804) internal successors, (5160), 4408 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:45,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 5160 transitions. [2022-11-20 11:12:45,531 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 5160 transitions. Word has length 210 [2022-11-20 11:12:45,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:45,532 INFO L495 AbstractCegarLoop]: Abstraction has 4409 states and 5160 transitions. [2022-11-20 11:12:45,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:45,533 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 5160 transitions. [2022-11-20 11:12:45,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-11-20 11:12:45,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:45,541 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:45,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:12:45,541 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:12:45,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:45,542 INFO L85 PathProgramCache]: Analyzing trace with hash 734182776, now seen corresponding path program 1 times [2022-11-20 11:12:45,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:45,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832489106] [2022-11-20 11:12:45,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:45,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:45,837 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-20 11:12:45,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:45,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832489106] [2022-11-20 11:12:45,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832489106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:45,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:45,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:12:45,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870563951] [2022-11-20 11:12:45,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:45,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:12:45,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:45,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:12:45,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:12:45,843 INFO L87 Difference]: Start difference. First operand 4409 states and 5160 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:48,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:48,873 INFO L93 Difference]: Finished difference Result 10936 states and 12970 transitions. [2022-11-20 11:12:48,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:12:48,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 212 [2022-11-20 11:12:48,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:48,904 INFO L225 Difference]: With dead ends: 10936 [2022-11-20 11:12:48,904 INFO L226 Difference]: Without dead ends: 6528 [2022-11-20 11:12:48,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:12:48,912 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 393 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:48,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 444 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-20 11:12:48,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6528 states. [2022-11-20 11:12:49,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6528 to 4382. [2022-11-20 11:12:49,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4382 states, 4381 states have (on average 1.1684546907098836) internal successors, (5119), 4381 states have internal predecessors, (5119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:49,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 5119 transitions. [2022-11-20 11:12:49,024 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 5119 transitions. Word has length 212 [2022-11-20 11:12:49,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:49,025 INFO L495 AbstractCegarLoop]: Abstraction has 4382 states and 5119 transitions. [2022-11-20 11:12:49,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:49,025 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 5119 transitions. [2022-11-20 11:12:49,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-20 11:12:49,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:49,031 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:49,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:12:49,031 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:12:49,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:49,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1597642430, now seen corresponding path program 1 times [2022-11-20 11:12:49,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:49,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145049451] [2022-11-20 11:12:49,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:49,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:49,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:49,407 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-20 11:12:49,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:49,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145049451] [2022-11-20 11:12:49,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145049451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:49,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:49,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:12:49,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823331885] [2022-11-20 11:12:49,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:49,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:12:49,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:49,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:12:49,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:12:49,412 INFO L87 Difference]: Start difference. First operand 4382 states and 5119 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:52,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:52,400 INFO L93 Difference]: Finished difference Result 10045 states and 11706 transitions. [2022-11-20 11:12:52,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:12:52,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 278 [2022-11-20 11:12:52,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:52,422 INFO L225 Difference]: With dead ends: 10045 [2022-11-20 11:12:52,423 INFO L226 Difference]: Without dead ends: 5665 [2022-11-20 11:12:52,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:12:52,429 INFO L413 NwaCegarLoop]: 833 mSDtfsCounter, 378 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:52,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 894 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-20 11:12:52,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5665 states. [2022-11-20 11:12:52,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5665 to 5234. [2022-11-20 11:12:52,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5234 states, 5233 states have (on average 1.1587999235620103) internal successors, (6064), 5233 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:52,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 6064 transitions. [2022-11-20 11:12:52,536 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 6064 transitions. Word has length 278 [2022-11-20 11:12:52,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:52,537 INFO L495 AbstractCegarLoop]: Abstraction has 5234 states and 6064 transitions. [2022-11-20 11:12:52,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:52,538 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 6064 transitions. [2022-11-20 11:12:52,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-11-20 11:12:52,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:52,544 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:52,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 11:12:52,544 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:12:52,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:52,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1503094523, now seen corresponding path program 1 times [2022-11-20 11:12:52,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:52,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957293523] [2022-11-20 11:12:52,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:52,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:53,000 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 300 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-20 11:12:53,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:53,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957293523] [2022-11-20 11:12:53,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957293523] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:53,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:53,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:12:53,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863710386] [2022-11-20 11:12:53,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:53,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:12:53,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:53,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:12:53,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:12:53,004 INFO L87 Difference]: Start difference. First operand 5234 states and 6064 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:56,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:56,103 INFO L93 Difference]: Finished difference Result 13051 states and 15223 transitions. [2022-11-20 11:12:56,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:12:56,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 290 [2022-11-20 11:12:56,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:56,129 INFO L225 Difference]: With dead ends: 13051 [2022-11-20 11:12:56,129 INFO L226 Difference]: Without dead ends: 7391 [2022-11-20 11:12:56,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:12:56,136 INFO L413 NwaCegarLoop]: 585 mSDtfsCounter, 495 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:56,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 629 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 1239 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-20 11:12:56,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7391 states. [2022-11-20 11:12:56,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7391 to 6959. [2022-11-20 11:12:56,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6959 states, 6958 states have (on average 1.1636964645012935) internal successors, (8097), 6958 states have internal predecessors, (8097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:56,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6959 states to 6959 states and 8097 transitions. [2022-11-20 11:12:56,274 INFO L78 Accepts]: Start accepts. Automaton has 6959 states and 8097 transitions. Word has length 290 [2022-11-20 11:12:56,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:56,275 INFO L495 AbstractCegarLoop]: Abstraction has 6959 states and 8097 transitions. [2022-11-20 11:12:56,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:56,276 INFO L276 IsEmpty]: Start isEmpty. Operand 6959 states and 8097 transitions. [2022-11-20 11:12:56,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-11-20 11:12:56,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:56,282 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:56,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 11:12:56,283 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:12:56,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:56,284 INFO L85 PathProgramCache]: Analyzing trace with hash 9506808, now seen corresponding path program 1 times [2022-11-20 11:12:56,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:56,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873651427] [2022-11-20 11:12:56,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:56,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:56,593 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-20 11:12:56,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:56,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873651427] [2022-11-20 11:12:56,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873651427] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:56,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:56,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:12:56,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279037576] [2022-11-20 11:12:56,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:56,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:12:56,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:56,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:12:56,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:12:56,597 INFO L87 Difference]: Start difference. First operand 6959 states and 8097 transitions. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:59,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:59,424 INFO L93 Difference]: Finished difference Result 17316 states and 20393 transitions. [2022-11-20 11:12:59,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:12:59,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 295 [2022-11-20 11:12:59,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:59,469 INFO L225 Difference]: With dead ends: 17316 [2022-11-20 11:12:59,469 INFO L226 Difference]: Without dead ends: 10359 [2022-11-20 11:12:59,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:12:59,479 INFO L413 NwaCegarLoop]: 774 mSDtfsCounter, 379 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:59,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 841 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-20 11:12:59,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10359 states. [2022-11-20 11:12:59,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10359 to 9509. [2022-11-20 11:12:59,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9509 states, 9508 states have (on average 1.141459823306689) internal successors, (10853), 9508 states have internal predecessors, (10853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:59,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9509 states to 9509 states and 10853 transitions. [2022-11-20 11:12:59,669 INFO L78 Accepts]: Start accepts. Automaton has 9509 states and 10853 transitions. Word has length 295 [2022-11-20 11:12:59,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:59,671 INFO L495 AbstractCegarLoop]: Abstraction has 9509 states and 10853 transitions. [2022-11-20 11:12:59,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:59,672 INFO L276 IsEmpty]: Start isEmpty. Operand 9509 states and 10853 transitions. [2022-11-20 11:12:59,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-11-20 11:12:59,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:59,679 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:59,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 11:12:59,680 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:12:59,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:59,681 INFO L85 PathProgramCache]: Analyzing trace with hash -881276880, now seen corresponding path program 1 times [2022-11-20 11:12:59,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:59,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549109941] [2022-11-20 11:12:59,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:59,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:59,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:00,167 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 300 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-20 11:13:00,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:13:00,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549109941] [2022-11-20 11:13:00,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549109941] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:13:00,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:13:00,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:13:00,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713924704] [2022-11-20 11:13:00,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:13:00,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:13:00,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:13:00,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:13:00,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:13:00,171 INFO L87 Difference]: Start difference. First operand 9509 states and 10853 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:03,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:13:03,248 INFO L93 Difference]: Finished difference Result 22432 states and 25678 transitions. [2022-11-20 11:13:03,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:13:03,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 313 [2022-11-20 11:13:03,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:13:03,281 INFO L225 Difference]: With dead ends: 22432 [2022-11-20 11:13:03,281 INFO L226 Difference]: Without dead ends: 12493 [2022-11-20 11:13:03,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:13:03,294 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 444 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:13:03,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 294 Invalid, 1506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-20 11:13:03,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12493 states. [2022-11-20 11:13:03,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12493 to 11637. [2022-11-20 11:13:03,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11637 states, 11636 states have (on average 1.1473014781711928) internal successors, (13350), 11636 states have internal predecessors, (13350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:03,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11637 states to 11637 states and 13350 transitions. [2022-11-20 11:13:03,493 INFO L78 Accepts]: Start accepts. Automaton has 11637 states and 13350 transitions. Word has length 313 [2022-11-20 11:13:03,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:13:03,498 INFO L495 AbstractCegarLoop]: Abstraction has 11637 states and 13350 transitions. [2022-11-20 11:13:03,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:03,498 INFO L276 IsEmpty]: Start isEmpty. Operand 11637 states and 13350 transitions. [2022-11-20 11:13:03,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-11-20 11:13:03,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:13:03,507 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:13:03,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 11:13:03,509 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:13:03,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:03,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1943349219, now seen corresponding path program 1 times [2022-11-20 11:13:03,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:13:03,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369541730] [2022-11-20 11:13:03,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:03,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:13:03,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:04,151 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-20 11:13:04,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:13:04,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369541730] [2022-11-20 11:13:04,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369541730] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:13:04,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:13:04,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:13:04,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841038500] [2022-11-20 11:13:04,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:13:04,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:13:04,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:13:04,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:13:04,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:13:04,154 INFO L87 Difference]: Start difference. First operand 11637 states and 13350 transitions. Second operand has 4 states, 4 states have (on average 59.25) internal successors, (237), 4 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:08,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:13:08,767 INFO L93 Difference]: Finished difference Result 41232 states and 47494 transitions. [2022-11-20 11:13:08,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:13:08,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.25) internal successors, (237), 4 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 318 [2022-11-20 11:13:08,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:13:08,824 INFO L225 Difference]: With dead ends: 41232 [2022-11-20 11:13:08,824 INFO L226 Difference]: Without dead ends: 28316 [2022-11-20 11:13:08,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:13:08,833 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 867 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 2613 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 3103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 2613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:13:08,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [867 Valid, 302 Invalid, 3103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 2613 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-20 11:13:08,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28316 states. [2022-11-20 11:13:09,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28316 to 27841. [2022-11-20 11:13:09,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27841 states, 27840 states have (on average 1.135308908045977) internal successors, (31607), 27840 states have internal predecessors, (31607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:09,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27841 states to 27841 states and 31607 transitions. [2022-11-20 11:13:09,244 INFO L78 Accepts]: Start accepts. Automaton has 27841 states and 31607 transitions. Word has length 318 [2022-11-20 11:13:09,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:13:09,244 INFO L495 AbstractCegarLoop]: Abstraction has 27841 states and 31607 transitions. [2022-11-20 11:13:09,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.25) internal successors, (237), 4 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:09,245 INFO L276 IsEmpty]: Start isEmpty. Operand 27841 states and 31607 transitions. [2022-11-20 11:13:09,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-11-20 11:13:09,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:13:09,255 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:13:09,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 11:13:09,256 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:13:09,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:09,257 INFO L85 PathProgramCache]: Analyzing trace with hash 2094585251, now seen corresponding path program 1 times [2022-11-20 11:13:09,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:13:09,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676342577] [2022-11-20 11:13:09,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:09,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:13:09,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:09,750 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-20 11:13:09,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:13:09,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676342577] [2022-11-20 11:13:09,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676342577] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:13:09,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:13:09,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:13:09,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237533878] [2022-11-20 11:13:09,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:13:09,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:13:09,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:13:09,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:13:09,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:13:09,753 INFO L87 Difference]: Start difference. First operand 27841 states and 31607 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:12,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:13:12,709 INFO L93 Difference]: Finished difference Result 71054 states and 80878 transitions. [2022-11-20 11:13:12,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:13:12,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 347 [2022-11-20 11:13:12,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:13:12,795 INFO L225 Difference]: With dead ends: 71054 [2022-11-20 11:13:12,795 INFO L226 Difference]: Without dead ends: 42777 [2022-11-20 11:13:12,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:13:12,822 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 449 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:13:12,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 704 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-20 11:13:12,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42777 states. [2022-11-20 11:13:13,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42777 to 41033. [2022-11-20 11:13:13,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41033 states, 41032 states have (on average 1.122514135309027) internal successors, (46059), 41032 states have internal predecessors, (46059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:13,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41033 states to 41033 states and 46059 transitions. [2022-11-20 11:13:13,591 INFO L78 Accepts]: Start accepts. Automaton has 41033 states and 46059 transitions. Word has length 347 [2022-11-20 11:13:13,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:13:13,592 INFO L495 AbstractCegarLoop]: Abstraction has 41033 states and 46059 transitions. [2022-11-20 11:13:13,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:13,593 INFO L276 IsEmpty]: Start isEmpty. Operand 41033 states and 46059 transitions. [2022-11-20 11:13:13,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2022-11-20 11:13:13,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:13:13,606 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:13:13,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 11:13:13,607 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:13:13,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:13,607 INFO L85 PathProgramCache]: Analyzing trace with hash 886548778, now seen corresponding path program 1 times [2022-11-20 11:13:13,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:13:13,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920218580] [2022-11-20 11:13:13,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:13,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:13:13,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:13,912 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-11-20 11:13:13,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:13:13,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920218580] [2022-11-20 11:13:13,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920218580] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:13:13,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:13:13,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:13:13,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476894498] [2022-11-20 11:13:13,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:13:13,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:13:13,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:13:13,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:13:13,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:13:13,915 INFO L87 Difference]: Start difference. First operand 41033 states and 46059 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:16,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:13:16,576 INFO L93 Difference]: Finished difference Result 91426 states and 102896 transitions. [2022-11-20 11:13:16,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:13:16,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 391 [2022-11-20 11:13:16,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:13:16,651 INFO L225 Difference]: With dead ends: 91426 [2022-11-20 11:13:16,652 INFO L226 Difference]: Without dead ends: 49966 [2022-11-20 11:13:16,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:13:16,678 INFO L413 NwaCegarLoop]: 676 mSDtfsCounter, 440 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:13:16,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 727 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-20 11:13:16,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49966 states. [2022-11-20 11:13:17,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49966 to 49959. [2022-11-20 11:13:17,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49959 states, 49958 states have (on average 1.1129548821009647) internal successors, (55601), 49958 states have internal predecessors, (55601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:17,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49959 states to 49959 states and 55601 transitions. [2022-11-20 11:13:17,584 INFO L78 Accepts]: Start accepts. Automaton has 49959 states and 55601 transitions. Word has length 391 [2022-11-20 11:13:17,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:13:17,585 INFO L495 AbstractCegarLoop]: Abstraction has 49959 states and 55601 transitions. [2022-11-20 11:13:17,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:17,586 INFO L276 IsEmpty]: Start isEmpty. Operand 49959 states and 55601 transitions. [2022-11-20 11:13:17,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2022-11-20 11:13:17,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:13:17,599 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:13:17,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 11:13:17,600 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:13:17,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:17,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1094283383, now seen corresponding path program 1 times [2022-11-20 11:13:17,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:13:17,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190979075] [2022-11-20 11:13:17,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:17,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:13:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:18,574 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 244 proven. 82 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-20 11:13:18,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:13:18,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190979075] [2022-11-20 11:13:18,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190979075] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:13:18,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152809709] [2022-11-20 11:13:18,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:18,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:13:18,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:13:18,580 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:13:18,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:13:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:18,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:13:18,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:13:19,768 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 244 proven. 82 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-20 11:13:19,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:13:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 326 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-20 11:13:20,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152809709] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:13:20,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:13:20,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2022-11-20 11:13:20,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063418198] [2022-11-20 11:13:20,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:13:20,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:13:20,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:13:20,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:13:20,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:13:20,352 INFO L87 Difference]: Start difference. First operand 49959 states and 55601 transitions. Second operand has 4 states, 4 states have (on average 84.75) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:24,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:13:24,895 INFO L93 Difference]: Finished difference Result 120772 states and 134197 transitions. [2022-11-20 11:13:24,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:13:24,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 84.75) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 394 [2022-11-20 11:13:24,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:13:24,963 INFO L225 Difference]: With dead ends: 120772 [2022-11-20 11:13:24,963 INFO L226 Difference]: Without dead ends: 69946 [2022-11-20 11:13:24,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 783 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:13:24,992 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 860 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 2111 mSolverCounterSat, 692 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 692 IncrementalHoareTripleChecker+Valid, 2111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:13:24,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [860 Valid, 144 Invalid, 2803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [692 Valid, 2111 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-20 11:13:25,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69946 states. [2022-11-20 11:13:25,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69946 to 67818. [2022-11-20 11:13:25,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67818 states, 67817 states have (on average 1.0979105534010647) internal successors, (74457), 67817 states have internal predecessors, (74457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:26,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67818 states to 67818 states and 74457 transitions. [2022-11-20 11:13:26,047 INFO L78 Accepts]: Start accepts. Automaton has 67818 states and 74457 transitions. Word has length 394 [2022-11-20 11:13:26,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:13:26,048 INFO L495 AbstractCegarLoop]: Abstraction has 67818 states and 74457 transitions. [2022-11-20 11:13:26,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.75) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:26,049 INFO L276 IsEmpty]: Start isEmpty. Operand 67818 states and 74457 transitions. [2022-11-20 11:13:26,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2022-11-20 11:13:26,058 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:13:26,059 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:13:26,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:13:26,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 11:13:26,265 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:13:26,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:26,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1101543085, now seen corresponding path program 1 times [2022-11-20 11:13:26,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:13:26,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867630051] [2022-11-20 11:13:26,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:26,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:13:26,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 356 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-20 11:13:27,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:13:27,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867630051] [2022-11-20 11:13:27,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867630051] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:13:27,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:13:27,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:13:27,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664698] [2022-11-20 11:13:27,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:13:27,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:13:27,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:13:27,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:13:27,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:13:27,468 INFO L87 Difference]: Start difference. First operand 67818 states and 74457 transitions. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:30,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:13:30,059 INFO L93 Difference]: Finished difference Result 139463 states and 153018 transitions. [2022-11-20 11:13:30,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:13:30,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 424 [2022-11-20 11:13:30,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:13:30,137 INFO L225 Difference]: With dead ends: 139463 [2022-11-20 11:13:30,137 INFO L226 Difference]: Without dead ends: 71647 [2022-11-20 11:13:30,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:13:30,160 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 358 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:13:30,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 349 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1162 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-20 11:13:30,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71647 states. [2022-11-20 11:13:31,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71647 to 70791. [2022-11-20 11:13:31,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70791 states, 70790 states have (on average 1.09598813391722) internal successors, (77585), 70790 states have internal predecessors, (77585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:31,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70791 states to 70791 states and 77585 transitions. [2022-11-20 11:13:31,375 INFO L78 Accepts]: Start accepts. Automaton has 70791 states and 77585 transitions. Word has length 424 [2022-11-20 11:13:31,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:13:31,376 INFO L495 AbstractCegarLoop]: Abstraction has 70791 states and 77585 transitions. [2022-11-20 11:13:31,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:31,377 INFO L276 IsEmpty]: Start isEmpty. Operand 70791 states and 77585 transitions. [2022-11-20 11:13:31,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2022-11-20 11:13:31,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:13:31,386 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:13:31,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 11:13:31,386 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:13:31,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:31,387 INFO L85 PathProgramCache]: Analyzing trace with hash 186174739, now seen corresponding path program 1 times [2022-11-20 11:13:31,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:13:31,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306621995] [2022-11-20 11:13:31,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:31,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:13:31,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 423 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-11-20 11:13:31,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:13:31,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306621995] [2022-11-20 11:13:31,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306621995] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:13:31,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:13:31,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:13:31,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916411239] [2022-11-20 11:13:31,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:13:31,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:13:31,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:13:31,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:13:31,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:13:31,937 INFO L87 Difference]: Start difference. First operand 70791 states and 77585 transitions. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:34,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:13:34,887 INFO L93 Difference]: Finished difference Result 148384 states and 162924 transitions. [2022-11-20 11:13:34,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:13:34,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 433 [2022-11-20 11:13:34,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:13:35,009 INFO L225 Difference]: With dead ends: 148384 [2022-11-20 11:13:35,010 INFO L226 Difference]: Without dead ends: 76741 [2022-11-20 11:13:35,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:13:35,052 INFO L413 NwaCegarLoop]: 586 mSDtfsCounter, 448 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:13:35,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 611 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-20 11:13:35,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76741 states. [2022-11-20 11:13:35,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76741 to 66506. [2022-11-20 11:13:35,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66506 states, 66505 states have (on average 1.0966694233516276) internal successors, (72934), 66505 states have internal predecessors, (72934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:36,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66506 states to 66506 states and 72934 transitions. [2022-11-20 11:13:36,051 INFO L78 Accepts]: Start accepts. Automaton has 66506 states and 72934 transitions. Word has length 433 [2022-11-20 11:13:36,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:13:36,051 INFO L495 AbstractCegarLoop]: Abstraction has 66506 states and 72934 transitions. [2022-11-20 11:13:36,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:36,051 INFO L276 IsEmpty]: Start isEmpty. Operand 66506 states and 72934 transitions. [2022-11-20 11:13:36,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-11-20 11:13:36,058 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:13:36,058 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:13:36,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 11:13:36,059 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:13:36,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:36,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1324595424, now seen corresponding path program 1 times [2022-11-20 11:13:36,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:13:36,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166076830] [2022-11-20 11:13:36,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:36,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:13:36,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 382 proven. 56 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-11-20 11:13:37,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:13:37,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166076830] [2022-11-20 11:13:37,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166076830] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:13:37,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196588535] [2022-11-20 11:13:37,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:37,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:13:37,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:13:37,703 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:13:37,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:13:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:37,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:13:37,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:13:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 441 proven. 82 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-11-20 11:13:38,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:13:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 441 proven. 82 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-11-20 11:13:39,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196588535] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:13:39,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:13:39,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2022-11-20 11:13:39,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607476248] [2022-11-20 11:13:39,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:13:39,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:13:39,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:13:39,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:13:39,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:13:39,887 INFO L87 Difference]: Start difference. First operand 66506 states and 72934 transitions. Second operand has 9 states, 9 states have (on average 83.66666666666667) internal successors, (753), 9 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:00,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:00,842 INFO L93 Difference]: Finished difference Result 180301 states and 197151 transitions. [2022-11-20 11:14:00,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 11:14:00,843 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 83.66666666666667) internal successors, (753), 9 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 438 [2022-11-20 11:14:00,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:00,974 INFO L225 Difference]: With dead ends: 180301 [2022-11-20 11:14:00,974 INFO L226 Difference]: Without dead ends: 112947 [2022-11-20 11:14:01,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 909 GetRequests, 887 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:14:01,008 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 9598 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 15722 mSolverCounterSat, 1904 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9598 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 17626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1904 IncrementalHoareTripleChecker+Valid, 15722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:01,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9598 Valid, 490 Invalid, 17626 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1904 Valid, 15722 Invalid, 0 Unknown, 0 Unchecked, 19.5s Time] [2022-11-20 11:14:01,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112947 states. [2022-11-20 11:14:02,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112947 to 97577. [2022-11-20 11:14:02,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97577 states, 97576 states have (on average 1.08705009428548) internal successors, (106070), 97576 states have internal predecessors, (106070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:02,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97577 states to 97577 states and 106070 transitions. [2022-11-20 11:14:02,477 INFO L78 Accepts]: Start accepts. Automaton has 97577 states and 106070 transitions. Word has length 438 [2022-11-20 11:14:02,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:02,478 INFO L495 AbstractCegarLoop]: Abstraction has 97577 states and 106070 transitions. [2022-11-20 11:14:02,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 83.66666666666667) internal successors, (753), 9 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:02,478 INFO L276 IsEmpty]: Start isEmpty. Operand 97577 states and 106070 transitions. [2022-11-20 11:14:02,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2022-11-20 11:14:02,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:02,485 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:02,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:02,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 11:14:02,699 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:02,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:02,699 INFO L85 PathProgramCache]: Analyzing trace with hash 515143898, now seen corresponding path program 1 times [2022-11-20 11:14:02,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:02,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100568777] [2022-11-20 11:14:02,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:02,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:02,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:04,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:04,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100568777] [2022-11-20 11:14:04,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100568777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:14:04,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:14:04,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:14:04,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323038937] [2022-11-20 11:14:04,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:14:04,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:14:04,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:04,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:14:04,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:14:04,073 INFO L87 Difference]: Start difference. First operand 97577 states and 106070 transitions. Second operand has 4 states, 4 states have (on average 117.75) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:08,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:08,551 INFO L93 Difference]: Finished difference Result 107819 states and 116831 transitions. [2022-11-20 11:14:08,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:14:08,551 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 117.75) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 471 [2022-11-20 11:14:08,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:08,654 INFO L225 Difference]: With dead ends: 107819 [2022-11-20 11:14:08,654 INFO L226 Difference]: Without dead ends: 107392 [2022-11-20 11:14:08,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:14:08,662 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 428 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 2303 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 2428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 2303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:08,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 301 Invalid, 2428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 2303 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-20 11:14:08,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107392 states. [2022-11-20 11:14:09,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107392 to 97577. [2022-11-20 11:14:09,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97577 states, 97576 states have (on average 1.087039845863737) internal successors, (106069), 97576 states have internal predecessors, (106069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:10,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97577 states to 97577 states and 106069 transitions. [2022-11-20 11:14:10,099 INFO L78 Accepts]: Start accepts. Automaton has 97577 states and 106069 transitions. Word has length 471 [2022-11-20 11:14:10,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:10,100 INFO L495 AbstractCegarLoop]: Abstraction has 97577 states and 106069 transitions. [2022-11-20 11:14:10,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.75) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:10,100 INFO L276 IsEmpty]: Start isEmpty. Operand 97577 states and 106069 transitions. [2022-11-20 11:14:10,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2022-11-20 11:14:10,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:10,107 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:10,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 11:14:10,107 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:10,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:10,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1587292591, now seen corresponding path program 1 times [2022-11-20 11:14:10,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:10,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053112975] [2022-11-20 11:14:10,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:10,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:10,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:10,605 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 367 proven. 0 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2022-11-20 11:14:10,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:10,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053112975] [2022-11-20 11:14:10,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053112975] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:14:10,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:14:10,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:14:10,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110961808] [2022-11-20 11:14:10,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:14:10,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:14:10,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:10,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:14:10,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:14:10,609 INFO L87 Difference]: Start difference. First operand 97577 states and 106069 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:12,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:12,878 INFO L93 Difference]: Finished difference Result 188335 states and 204404 transitions. [2022-11-20 11:14:12,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:14:12,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 487 [2022-11-20 11:14:12,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:12,978 INFO L225 Difference]: With dead ends: 188335 [2022-11-20 11:14:12,978 INFO L226 Difference]: Without dead ends: 91609 [2022-11-20 11:14:13,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:14:13,018 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 588 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:13,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 94 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-20 11:14:13,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91609 states. [2022-11-20 11:14:14,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91609 to 91592. [2022-11-20 11:14:14,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91592 states, 91591 states have (on average 1.0825299428983197) internal successors, (99150), 91591 states have internal predecessors, (99150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:14,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91592 states to 91592 states and 99150 transitions. [2022-11-20 11:14:14,467 INFO L78 Accepts]: Start accepts. Automaton has 91592 states and 99150 transitions. Word has length 487 [2022-11-20 11:14:14,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:14,468 INFO L495 AbstractCegarLoop]: Abstraction has 91592 states and 99150 transitions. [2022-11-20 11:14:14,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:14,468 INFO L276 IsEmpty]: Start isEmpty. Operand 91592 states and 99150 transitions. [2022-11-20 11:14:14,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2022-11-20 11:14:14,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:14,476 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:14,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 11:14:14,477 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:14,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:14,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1062405964, now seen corresponding path program 1 times [2022-11-20 11:14:14,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:14,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845054158] [2022-11-20 11:14:14,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:14,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:15,335 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-11-20 11:14:15,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:15,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845054158] [2022-11-20 11:14:15,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845054158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:14:15,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:14:15,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:14:15,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046955525] [2022-11-20 11:14:15,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:14:15,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:14:15,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:15,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:14:15,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:14:15,340 INFO L87 Difference]: Start difference. First operand 91592 states and 99150 transitions. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:18,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:18,386 INFO L93 Difference]: Finished difference Result 181052 states and 196042 transitions. [2022-11-20 11:14:18,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:14:18,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 501 [2022-11-20 11:14:18,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:18,471 INFO L225 Difference]: With dead ends: 181052 [2022-11-20 11:14:18,471 INFO L226 Difference]: Without dead ends: 90311 [2022-11-20 11:14:18,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:14:18,502 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 431 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:18,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 686 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-20 11:14:18,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90311 states. [2022-11-20 11:14:20,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90311 to 88609. [2022-11-20 11:14:20,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88609 states, 88608 states have (on average 1.0687861141206212) internal successors, (94703), 88608 states have internal predecessors, (94703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:20,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88609 states to 88609 states and 94703 transitions. [2022-11-20 11:14:20,177 INFO L78 Accepts]: Start accepts. Automaton has 88609 states and 94703 transitions. Word has length 501 [2022-11-20 11:14:20,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:20,177 INFO L495 AbstractCegarLoop]: Abstraction has 88609 states and 94703 transitions. [2022-11-20 11:14:20,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:20,177 INFO L276 IsEmpty]: Start isEmpty. Operand 88609 states and 94703 transitions. [2022-11-20 11:14:20,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2022-11-20 11:14:20,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:20,186 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:20,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-20 11:14:20,187 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:20,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:20,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1384033671, now seen corresponding path program 1 times [2022-11-20 11:14:20,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:20,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103460930] [2022-11-20 11:14:20,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:20,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:20,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:20,510 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 223 proven. 0 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2022-11-20 11:14:20,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:20,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103460930] [2022-11-20 11:14:20,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103460930] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:14:20,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:14:20,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:14:20,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734240205] [2022-11-20 11:14:20,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:14:20,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:14:20,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:20,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:14:20,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:14:20,513 INFO L87 Difference]: Start difference. First operand 88609 states and 94703 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:23,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:23,816 INFO L93 Difference]: Finished difference Result 184892 states and 197657 transitions. [2022-11-20 11:14:23,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:14:23,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 507 [2022-11-20 11:14:23,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:23,924 INFO L225 Difference]: With dead ends: 184892 [2022-11-20 11:14:23,924 INFO L226 Difference]: Without dead ends: 95429 [2022-11-20 11:14:23,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:14:23,969 INFO L413 NwaCegarLoop]: 717 mSDtfsCounter, 390 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:23,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 764 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1231 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-20 11:14:24,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95429 states. [2022-11-20 11:14:25,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95429 to 91153. [2022-11-20 11:14:25,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91153 states, 91152 states have (on average 1.066449447077409) internal successors, (97209), 91152 states have internal predecessors, (97209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:25,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91153 states to 91153 states and 97209 transitions. [2022-11-20 11:14:25,760 INFO L78 Accepts]: Start accepts. Automaton has 91153 states and 97209 transitions. Word has length 507 [2022-11-20 11:14:25,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:25,761 INFO L495 AbstractCegarLoop]: Abstraction has 91153 states and 97209 transitions. [2022-11-20 11:14:25,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:25,761 INFO L276 IsEmpty]: Start isEmpty. Operand 91153 states and 97209 transitions. [2022-11-20 11:14:25,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2022-11-20 11:14:25,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:25,774 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:25,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-20 11:14:25,774 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:25,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:25,775 INFO L85 PathProgramCache]: Analyzing trace with hash 18735335, now seen corresponding path program 1 times [2022-11-20 11:14:25,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:25,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901078985] [2022-11-20 11:14:25,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:25,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:26,828 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 488 proven. 56 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-11-20 11:14:26,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:26,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901078985] [2022-11-20 11:14:26,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901078985] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:26,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405460485] [2022-11-20 11:14:26,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:26,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:26,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:26,831 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:26,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:14:27,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:27,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:14:27,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:27,197 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 223 proven. 0 refuted. 0 times theorem prover too weak. 566 trivial. 0 not checked. [2022-11-20 11:14:27,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:14:27,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405460485] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:14:27,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:14:27,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-20 11:14:27,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551288566] [2022-11-20 11:14:27,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:14:27,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:14:27,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:27,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:14:27,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:14:27,200 INFO L87 Difference]: Start difference. First operand 91153 states and 97209 transitions. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:29,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:29,892 INFO L93 Difference]: Finished difference Result 92438 states and 98531 transitions. [2022-11-20 11:14:29,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:14:29,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 574 [2022-11-20 11:14:29,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:29,983 INFO L225 Difference]: With dead ends: 92438 [2022-11-20 11:14:29,983 INFO L226 Difference]: Without dead ends: 92011 [2022-11-20 11:14:29,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 574 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:14:29,995 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 416 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:29,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 287 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-20 11:14:30,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92011 states. [2022-11-20 11:14:31,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92011 to 91153. [2022-11-20 11:14:31,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91153 states, 91152 states have (on average 1.0659338248200807) internal successors, (97162), 91152 states have internal predecessors, (97162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:31,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91153 states to 91153 states and 97162 transitions. [2022-11-20 11:14:31,467 INFO L78 Accepts]: Start accepts. Automaton has 91153 states and 97162 transitions. Word has length 574 [2022-11-20 11:14:31,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:31,468 INFO L495 AbstractCegarLoop]: Abstraction has 91153 states and 97162 transitions. [2022-11-20 11:14:31,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:31,468 INFO L276 IsEmpty]: Start isEmpty. Operand 91153 states and 97162 transitions. [2022-11-20 11:14:31,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2022-11-20 11:14:31,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:31,483 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:31,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:31,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-20 11:14:31,685 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:31,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:31,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1727057822, now seen corresponding path program 1 times [2022-11-20 11:14:31,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:31,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527303797] [2022-11-20 11:14:31,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:31,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:31,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 847 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-11-20 11:14:32,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:32,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527303797] [2022-11-20 11:14:32,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527303797] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:14:32,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:14:32,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:14:32,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766278615] [2022-11-20 11:14:32,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:14:32,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:14:32,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:32,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:14:32,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:14:32,187 INFO L87 Difference]: Start difference. First operand 91153 states and 97162 transitions. Second operand has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:37,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:37,454 INFO L93 Difference]: Finished difference Result 205288 states and 218825 transitions. [2022-11-20 11:14:37,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:14:37,455 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 598 [2022-11-20 11:14:37,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:37,573 INFO L225 Difference]: With dead ends: 205288 [2022-11-20 11:14:37,574 INFO L226 Difference]: Without dead ends: 114987 [2022-11-20 11:14:37,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:14:37,596 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 728 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 2260 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 2702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 2260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:37,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 183 Invalid, 2702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 2260 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-20 11:14:37,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114987 states. [2022-11-20 11:14:39,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114987 to 107754. [2022-11-20 11:14:39,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107754 states, 107753 states have (on average 1.0635620353957662) internal successors, (114602), 107753 states have internal predecessors, (114602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:39,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107754 states to 107754 states and 114602 transitions. [2022-11-20 11:14:39,378 INFO L78 Accepts]: Start accepts. Automaton has 107754 states and 114602 transitions. Word has length 598 [2022-11-20 11:14:39,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:39,379 INFO L495 AbstractCegarLoop]: Abstraction has 107754 states and 114602 transitions. [2022-11-20 11:14:39,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:39,379 INFO L276 IsEmpty]: Start isEmpty. Operand 107754 states and 114602 transitions. [2022-11-20 11:14:39,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 626 [2022-11-20 11:14:39,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:39,405 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:39,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-20 11:14:39,406 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:39,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:39,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1593823497, now seen corresponding path program 1 times [2022-11-20 11:14:39,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:39,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351756754] [2022-11-20 11:14:39,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:39,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:39,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 530 proven. 72 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-20 11:14:40,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:40,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351756754] [2022-11-20 11:14:40,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351756754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:40,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614275389] [2022-11-20 11:14:40,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:40,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:40,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:40,879 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:40,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39c3c1f1-99d7-4fef-95a3-ddf8d31f349f/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:14:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:41,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:14:41,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:41,662 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 382 proven. 56 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-11-20 11:14:41,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:42,149 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 438 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-11-20 11:14:42,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614275389] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:42,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:14:42,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 8 [2022-11-20 11:14:42,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362287800] [2022-11-20 11:14:42,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:14:42,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:14:42,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:42,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:14:42,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:14:42,153 INFO L87 Difference]: Start difference. First operand 107754 states and 114602 transitions. Second operand has 4 states, 4 states have (on average 115.75) internal successors, (463), 4 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:47,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:47,353 INFO L93 Difference]: Finished difference Result 232964 states and 248245 transitions. [2022-11-20 11:14:47,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:14:47,354 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 115.75) internal successors, (463), 4 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 625 [2022-11-20 11:14:47,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:47,498 INFO L225 Difference]: With dead ends: 232964 [2022-11-20 11:14:47,498 INFO L226 Difference]: Without dead ends: 125212 [2022-11-20 11:14:47,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1253 GetRequests, 1246 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:14:47,540 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 944 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 2118 mSolverCounterSat, 610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 944 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 2728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 610 IncrementalHoareTripleChecker+Valid, 2118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:47,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [944 Valid, 116 Invalid, 2728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [610 Valid, 2118 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-20 11:14:47,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125212 states.